CINXE.COM

<!DOCTYPE html> <html class="client-nojs vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-enabled vector-feature-custom-font-size-clientpref-1 vector-feature-appearance-pinned-clientpref-1 vector-feature-night-mode-enabled skin-theme-clientpref-day vector-sticky-header-enabled vector-toc-available" lang="it" dir="ltr"> <head> <meta charset="UTF-8"> <title>Compressione dell'immagine - Wikipedia</title> <script>(function(){var className="client-js vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-enabled vector-feature-custom-font-size-clientpref-1 vector-feature-appearance-pinned-clientpref-1 vector-feature-night-mode-enabled skin-theme-clientpref-day vector-sticky-header-enabled vector-toc-available";var cookie=document.cookie.match(/(?:^|; )itwikimwclientpreferences=([^;]+)/);if(cookie){cookie[1].split('%2C').forEach(function(pref){className=className.replace(new RegExp('(^| )'+pref.replace(/-clientpref-\w+$|[^\w-]+/g,'')+'-clientpref-\\w+( |$)'),'$1'+pref+'$2');});}document.documentElement.className=className;}());RLCONF={"wgBreakFrames":false,"wgSeparatorTransformTable":[",\t."," \t,"],"wgDigitTransformTable":["",""],"wgDefaultDateFormat":"dmy","wgMonthNames":["","gennaio","febbraio","marzo","aprile","maggio","giugno","luglio","agosto","settembre","ottobre","novembre","dicembre"],"wgRequestId":"bf2e4d85-8e76-480e-918c-48c6dd83ef5d","wgCanonicalNamespace":"","wgCanonicalSpecialPageName":false,"wgNamespaceNumber":0,"wgPageName":"Compressione_dell'immagine","wgTitle":"Compressione dell'immagine","wgCurRevisionId":139907753,"wgRevisionId":139907753,"wgArticleId":1162158,"wgIsArticle":true,"wgIsRedirect":false,"wgAction":"view","wgUserName":null,"wgUserGroups":["*"],"wgCategories":["P3847 letta da Wikidata","Compressione dei dati","Elaborazione digitale delle immagini"],"wgPageViewLanguage":"it","wgPageContentLanguage":"it","wgPageContentModel":"wikitext","wgRelevantPageName":"Compressione_dell'immagine","wgRelevantArticleId":1162158,"wgIsProbablyEditable":true,"wgRelevantPageIsProbablyEditable":true,"wgRestrictionEdit":[],"wgRestrictionMove":[],"wgNoticeProject":"wikipedia","wgCiteReferencePreviewsActive":false,"wgMediaViewerOnClick":true,"wgMediaViewerEnabledByDefault":true,"wgPopupsFlags":0,"wgVisualEditor":{"pageLanguageCode":"it","pageLanguageDir":"ltr","pageVariantFallbacks":"it"},"wgMFDisplayWikibaseDescriptions":{"search":true,"watchlist":true,"tagline":true,"nearby":true},"wgWMESchemaEditAttemptStepOversample":false,"wgWMEPageLength":7000,"wgEditSubmitButtonLabelPublish":true,"wgULSPosition":"interlanguage","wgULSisCompactLinksEnabled":false,"wgVector2022LanguageInHeader":true,"wgULSisLanguageSelectorEmpty":false,"wgWikibaseItemId":"Q412438","wgCheckUserClientHintsHeadersJsApi":["brands","architecture","bitness","fullVersionList","mobile","model","platform","platformVersion"],"GEHomepageSuggestedEditsEnableTopics":true,"wgGETopicsMatchModeEnabled":false,"wgGELevelingUpEnabledForUser":false}; RLSTATE={"ext.globalCssJs.user.styles":"ready","site.styles":"ready","user.styles":"ready","ext.globalCssJs.user":"ready","user":"ready","user.options":"loading","ext.cite.styles":"ready","mediawiki.page.gallery.styles":"ready","skins.vector.search.codex.styles":"ready","skins.vector.styles":"ready","skins.vector.icons":"ready","jquery.makeCollapsible.styles":"ready","ext.wikimediamessages.styles":"ready","ext.visualEditor.desktopArticleTarget.noscript":"ready","ext.uls.interlanguage":"ready","wikibase.client.init":"ready"};RLPAGEMODULES=["ext.cite.ux-enhancements","mediawiki.page.media","site","mediawiki.page.ready","jquery.makeCollapsible","mediawiki.toc","skins.vector.js","ext.centralNotice.geoIP","ext.centralNotice.startUp","ext.gadget.MainPageWikiList","ext.gadget.stru-commonsupload","ext.gadget.HiddenCat","ext.gadget.ReferenceTooltips","ext.gadget.TitoloErrato","ext.gadget.NewSection","ext.gadget.RichiediRevisioneBozza","ext.urlShortener.toolbar","ext.centralauth.centralautologin","mmv.bootstrap","ext.popups","ext.visualEditor.desktopArticleTarget.init","ext.visualEditor.targetLoader","ext.echo.centralauth","ext.eventLogging","ext.wikimediaEvents","ext.navigationTiming","ext.uls.interface","ext.cx.eventlogging.campaigns","ext.cx.uls.quick.actions","wikibase.client.vector-2022","ext.checkUser.clientHints","ext.growthExperiments.SuggestedEditSession"];</script> <script>(RLQ=window.RLQ||[]).push(function(){mw.loader.impl(function(){return["user.options@12s5i",function($,jQuery,require,module){mw.user.tokens.set({"patrolToken":"+\\","watchToken":"+\\","csrfToken":"+\\"}); }];});});</script> <link rel="stylesheet" href="/w/load.php?lang=it&modules=ext.cite.styles%7Cext.uls.interlanguage%7Cext.visualEditor.desktopArticleTarget.noscript%7Cext.wikimediamessages.styles%7Cjquery.makeCollapsible.styles%7Cmediawiki.page.gallery.styles%7Cskins.vector.icons%2Cstyles%7Cskins.vector.search.codex.styles%7Cwikibase.client.init&only=styles&skin=vector-2022"> <script async="" src="/w/load.php?lang=it&modules=startup&only=scripts&raw=1&skin=vector-2022"></script> <meta name="ResourceLoaderDynamicStyles" content=""> <link rel="stylesheet" href="/w/load.php?lang=it&modules=site.styles&only=styles&skin=vector-2022"> <meta name="generator" content="MediaWiki 1.44.0-wmf.22"> <meta name="referrer" content="origin"> <meta name="referrer" content="origin-when-cross-origin"> <meta name="robots" content="max-image-preview:standard"> <meta name="format-detection" content="telephone=no"> <meta property="og:image" content="https://upload.wikimedia.org/wikipedia/commons/thumb/c/ce/Quality_comparison_jpg_vs_saveforweb.jpg/1200px-Quality_comparison_jpg_vs_saveforweb.jpg"> <meta property="og:image:width" content="1200"> <meta property="og:image:height" content="1000"> <meta property="og:image" content="https://upload.wikimedia.org/wikipedia/commons/thumb/c/ce/Quality_comparison_jpg_vs_saveforweb.jpg/800px-Quality_comparison_jpg_vs_saveforweb.jpg"> <meta property="og:image:width" content="800"> <meta property="og:image:height" content="667"> <meta property="og:image" content="https://upload.wikimedia.org/wikipedia/commons/thumb/c/ce/Quality_comparison_jpg_vs_saveforweb.jpg/640px-Quality_comparison_jpg_vs_saveforweb.jpg"> <meta property="og:image:width" content="640"> <meta property="og:image:height" content="533"> <meta name="viewport" content="width=1120"> <meta property="og:title" content="Compressione dell'immagine - Wikipedia"> <meta property="og:type" content="website"> <link rel="preconnect" href="//upload.wikimedia.org"> <link rel="alternate" media="only screen and (max-width: 640px)" href="//it.m.wikipedia.org/wiki/Compressione_dell%27immagine"> <link rel="alternate" type="application/x-wiki" title="Modifica" href="/w/index.php?title=Compressione_dell%27immagine&action=edit"> <link rel="apple-touch-icon" href="/static/apple-touch/wikipedia.png"> <link rel="icon" href="/static/favicon/wikipedia.ico"> <link rel="search" type="application/opensearchdescription+xml" href="/w/rest.php/v1/search" title="Wikipedia (it)"> <link rel="EditURI" type="application/rsd+xml" href="//it.wikipedia.org/w/api.php?action=rsd"> <link rel="canonical" href="https://it.wikipedia.org/wiki/Compressione_dell%27immagine"> <link rel="license" href="https://creativecommons.org/licenses/by-sa/4.0/deed.it"> <link rel="alternate" type="application/atom+xml" title="Feed Atom di Wikipedia" href="/w/index.php?title=Speciale:UltimeModifiche&feed=atom"> <link rel="dns-prefetch" href="//meta.wikimedia.org" /> <link rel="dns-prefetch" href="auth.wikimedia.org"> </head> <body class="skin--responsive skin-vector skin-vector-search-vue mediawiki ltr sitedir-ltr mw-hide-empty-elt ns-0 ns-subject mw-editable page-Compressione_dell_immagine rootpage-Compressione_dell_immagine skin-vector-2022 action-view"><a class="mw-jump-link" href="#bodyContent">Vai al contenuto</a> <div class="vector-header-container"> <header class="vector-header mw-header"> <div class="vector-header-start"> <nav class="vector-main-menu-landmark" aria-label="Sito"> <div id="vector-main-menu-dropdown" class="vector-dropdown vector-main-menu-dropdown vector-button-flush-left vector-button-flush-right" title="Menu principale" > <input type="checkbox" id="vector-main-menu-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-main-menu-dropdown" class="vector-dropdown-checkbox " aria-label="Menu principale" > <label id="vector-main-menu-dropdown-label" for="vector-main-menu-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-menu mw-ui-icon-wikimedia-menu"></span> <span class="vector-dropdown-label-text">Menu principale</span> </label> <div class="vector-dropdown-content"> <div id="vector-main-menu-unpinned-container" class="vector-unpinned-container"> <div id="vector-main-menu" class="vector-main-menu vector-pinnable-element"> <div class="vector-pinnable-header vector-main-menu-pinnable-header vector-pinnable-header-unpinned" data-feature-name="main-menu-pinned" data-pinnable-element-id="vector-main-menu" data-pinned-container-id="vector-main-menu-pinned-container" data-unpinned-container-id="vector-main-menu-unpinned-container" > <div class="vector-pinnable-header-label">Menu principale</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-main-menu.pin">sposta nella barra laterale</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-main-menu.unpin">nascondi</button> </div> <div id="p-navigation" class="vector-menu mw-portlet mw-portlet-navigation" > <div class="vector-menu-heading"> Navigazione </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-mainpage-description" class="mw-list-item"><a href="/wiki/Pagina_principale" title="Visita la pagina principale [z]" accesskey="z"><span>Pagina principale</span></a></li><li id="n-recentchanges" class="mw-list-item"><a href="/wiki/Speciale:UltimeModifiche" title="Elenco delle ultime modifiche del sito [r]" accesskey="r"><span>Ultime modifiche</span></a></li><li id="n-randompage" class="mw-list-item"><a href="/wiki/Speciale:PaginaCasuale" title="Mostra una pagina a caso [x]" accesskey="x"><span>Una voce a caso</span></a></li><li id="n-nearby-pages-title" class="mw-list-item"><a href="/wiki/Speciale:NelleVicinanze"><span>Nelle vicinanze</span></a></li><li id="n-vetrina" class="mw-list-item"><a href="/wiki/Wikipedia:Vetrina"><span>Vetrina</span></a></li><li id="n-help" class="mw-list-item"><a href="/wiki/Aiuto:Aiuto" title="Pagine di aiuto"><span>Aiuto</span></a></li><li id="n-Sportello-informazioni" class="mw-list-item"><a href="/wiki/Aiuto:Sportello_informazioni"><span>Sportello informazioni</span></a></li><li id="n-specialpages" class="mw-list-item"><a href="/wiki/Speciale:PagineSpeciali"><span>Pagine speciali</span></a></li> </ul> </div> </div> <div id="p-Comunità" class="vector-menu mw-portlet mw-portlet-Comunità" > <div class="vector-menu-heading"> Comunità </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-portal" class="mw-list-item"><a href="/wiki/Portale:Comunit%C3%A0" title="Descrizione del progetto, cosa puoi fare, dove trovare le cose"><span>Portale Comunità</span></a></li><li id="n-villagepump" class="mw-list-item"><a href="/wiki/Wikipedia:Bar"><span>Bar</span></a></li><li id="n-wikipediano" class="mw-list-item"><a href="/wiki/Wikipedia:Wikipediano"><span>Il Wikipediano</span></a></li><li id="n-contactpage" class="mw-list-item"><a href="/wiki/Wikipedia:Contatti"><span>Contatti</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> <a href="/wiki/Pagina_principale" class="mw-logo"> <img class="mw-logo-icon" src="/static/images/icons/wikipedia.png" alt="" aria-hidden="true" height="50" width="50"> <span class="mw-logo-container skin-invert"> <img class="mw-logo-wordmark" alt="Wikipedia" src="/static/images/mobile/copyright/wikipedia-wordmark-en.svg" style="width: 7.5em; height: 1.125em;"> <img class="mw-logo-tagline" alt="L'enciclopedia libera" src="/static/images/mobile/copyright/wikipedia-tagline-it.svg" width="120" height="13" style="width: 7.5em; height: 0.8125em;"> </span> </a> </div> <div class="vector-header-end"> <div id="p-search" role="search" class="vector-search-box-vue vector-search-box-collapses vector-search-box-show-thumbnail vector-search-box-auto-expand-width vector-search-box"> <a href="/wiki/Speciale:Ricerca" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only search-toggle" title="Cerca in Wikipedia [f]" accesskey="f"><span class="vector-icon mw-ui-icon-search mw-ui-icon-wikimedia-search"></span> <span>Ricerca</span> </a> <div class="vector-typeahead-search-container"> <div class="cdx-typeahead-search cdx-typeahead-search--show-thumbnail cdx-typeahead-search--auto-expand-width"> <form action="/w/index.php" id="searchform" class="cdx-search-input cdx-search-input--has-end-button"> <div id="simpleSearch" class="cdx-search-input__input-wrapper" data-search-loc="header-moved"> <div class="cdx-text-input cdx-text-input--has-start-icon"> <input class="cdx-text-input__input" type="search" name="search" placeholder="Cerca in Wikipedia" aria-label="Cerca in Wikipedia" autocapitalize="sentences" title="Cerca in Wikipedia [f]" accesskey="f" id="searchInput" > <span class="cdx-text-input__icon cdx-text-input__start-icon"></span> </div> <input type="hidden" name="title" value="Speciale:Ricerca"> </div> <button class="cdx-button cdx-search-input__end-button">Ricerca</button> </form> </div> </div> </div> <nav class="vector-user-links vector-user-links-wide" aria-label="Strumenti personali"> <div class="vector-user-links-main"> <div id="p-vector-user-menu-preferences" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-userpage" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <nav class="vector-appearance-landmark" aria-label="Aspetto"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Modifica la dimensione, la larghezza e il colore del testo" > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" class="vector-dropdown-checkbox " aria-label="Aspetto" > <label id="vector-appearance-dropdown-label" for="vector-appearance-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-appearance mw-ui-icon-wikimedia-appearance"></span> <span class="vector-dropdown-label-text">Aspetto</span> </label> <div class="vector-dropdown-content"> <div id="vector-appearance-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div id="p-vector-user-menu-notifications" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="https://donate.wikimedia.org/?wmf_source=donate&wmf_medium=sidebar&wmf_campaign=it.wikipedia.org&uselang=it" class=""><span>Fai una donazione</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Speciale:CreaUtenza&returnto=Compressione+dell%27immagine" title="Si consiglia di registrarsi e di effettuare l'accesso, anche se non è obbligatorio" class=""><span>registrati</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Speciale:Entra&returnto=Compressione+dell%27immagine" title="Si consiglia di effettuare l'accesso, anche se non è obbligatorio [o]" accesskey="o" class=""><span>entra</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Altre opzioni" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Strumenti personali" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Strumenti personali</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="Menu utente" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="https://donate.wikimedia.org/?wmf_source=donate&wmf_medium=sidebar&wmf_campaign=it.wikipedia.org&uselang=it"><span>Fai una donazione</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Speciale:CreaUtenza&returnto=Compressione+dell%27immagine" title="Si consiglia di registrarsi e di effettuare l'accesso, anche se non è obbligatorio"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>registrati</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Speciale:Entra&returnto=Compressione+dell%27immagine" title="Si consiglia di effettuare l'accesso, anche se non è obbligatorio [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>entra</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Pagine per utenti anonimi <a href="/wiki/Aiuto:Benvenuto" aria-label="Ulteriori informazioni sulla contribuzione"><span>ulteriori informazioni</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Speciale:MieiContributi" title="Un elenco delle modifiche fatte da questo indirizzo IP [y]" accesskey="y"><span>contributi</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Speciale:MieDiscussioni" title="Discussioni sulle modifiche fatte da questo indirizzo IP [n]" accesskey="n"><span>discussioni</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Sito"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Indice" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Indice</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">sposta nella barra laterale</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">nascondi</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Inizio</div> </a> </li> <li id="toc-Descrizione" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Descrizione"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Descrizione</span> </div> </a> <button aria-controls="toc-Descrizione-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Attiva/disattiva la sottosezione Descrizione</span> </button> <ul id="toc-Descrizione-sublist" class="vector-toc-list"> <li id="toc-Senza_perdita" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Senza_perdita"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.1</span> <span>Senza perdita</span> </div> </a> <ul id="toc-Senza_perdita-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Con_perdita" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Con_perdita"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.2</span> <span>Con perdita</span> </div> </a> <ul id="toc-Con_perdita-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Esempi" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Esempi"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Esempi</span> </div> </a> <ul id="toc-Esempi-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Note" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Note"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Note</span> </div> </a> <ul id="toc-Note-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Voci_correlate" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Voci_correlate"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Voci correlate</span> </div> </a> <ul id="toc-Voci_correlate-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Altri_progetti" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Altri_progetti"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Altri progetti</span> </div> </a> <ul id="toc-Altri_progetti-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Collegamenti_esterni" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Collegamenti_esterni"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Collegamenti esterni</span> </div> </a> <ul id="toc-Collegamenti_esterni-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Indice" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Indice" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Mostra/Nascondi l'indice" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Mostra/Nascondi l'indice</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Compressione dell'immagine</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Vai a una voce in un'altra lingua. Disponibile in 27 lingue" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-27" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">27 lingue</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%B6%D8%BA%D8%B7_%D8%B5%D9%88%D8%B1%D8%A9" title="ضغط صورة - arabo" lang="ar" hreflang="ar" data-title="ضغط صورة" data-language-autonym="العربية" data-language-local-name="arabo" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-bar mw-list-item"><a href="https://bar.wikipedia.org/wiki/Buidlkompression" title="Buidlkompression - bavarese" lang="bar" hreflang="bar" data-title="Buidlkompression" data-language-autonym="Boarisch" data-language-local-name="bavarese" class="interlanguage-link-target"><span>Boarisch</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%9A%D0%BE%D0%BC%D0%BF%D1%80%D0%B5%D1%81%D0%B8%D1%80%D0%B0%D0%BD%D0%B5_%D0%BD%D0%B0_%D0%B8%D0%B7%D0%BE%D0%B1%D1%80%D0%B0%D0%B6%D0%B5%D0%BD%D0%B8%D1%8F" title="Компресиране на изображения - bulgaro" lang="bg" hreflang="bg" data-title="Компресиране на изображения" data-language-autonym="Български" data-language-local-name="bulgaro" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Compressi%C3%B3_d%27imatge" title="Compressió d'imatge - catalano" lang="ca" hreflang="ca" data-title="Compressió d'imatge" data-language-autonym="Català" data-language-local-name="catalano" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Bildkompression" title="Bildkompression - tedesco" lang="de" hreflang="de" data-title="Bildkompression" data-language-autonym="Deutsch" data-language-local-name="tedesco" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Image_compression" title="Image compression - inglese" lang="en" hreflang="en" data-title="Image compression" data-language-autonym="English" data-language-local-name="inglese" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Compresi%C3%B3n_de_imagen" title="Compresión de imagen - spagnolo" lang="es" hreflang="es" data-title="Compresión de imagen" data-language-autonym="Español" data-language-local-name="spagnolo" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Irudien_konpresio" title="Irudien konpresio - basco" lang="eu" hreflang="eu" data-title="Irudien konpresio" data-language-autonym="Euskara" data-language-local-name="basco" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%81%D8%B4%D8%B1%D8%AF%D9%87%E2%80%8C%D8%B3%D8%A7%D8%B2%DB%8C_%D8%AA%D8%B5%D9%88%DB%8C%D8%B1" title="فشرده‌سازی تصویر - persiano" lang="fa" hreflang="fa" data-title="فشرده‌سازی تصویر" data-language-autonym="فارسی" data-language-local-name="persiano" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Kuvanpakkaus" title="Kuvanpakkaus - finlandese" lang="fi" hreflang="fi" data-title="Kuvanpakkaus" data-language-autonym="Suomi" data-language-local-name="finlandese" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Compression_d%27image" title="Compression d'image - francese" lang="fr" hreflang="fr" data-title="Compression d'image" data-language-autonym="Français" data-language-local-name="francese" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%93%D7%97%D7%99%D7%A1%D7%AA_%D7%AA%D7%9E%D7%95%D7%A0%D7%94" title="דחיסת תמונה - ebraico" lang="he" hreflang="he" data-title="דחיסת תמונה" data-language-autonym="עברית" data-language-local-name="ebraico" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/K%C3%A9pt%C3%B6m%C3%B6r%C3%ADt%C3%A9s" title="Képtömörítés - ungherese" lang="hu" hreflang="hu" data-title="Képtömörítés" data-language-autonym="Magyar" data-language-local-name="ungherese" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Pemampatan_citra" title="Pemampatan citra - indonesiano" lang="id" hreflang="id" data-title="Pemampatan citra" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesiano" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/%C3%9Ej%C3%B6ppun_mynda" title="Þjöppun mynda - islandese" lang="is" hreflang="is" data-title="Þjöppun mynda" data-language-autonym="Íslenska" data-language-local-name="islandese" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E7%94%BB%E5%83%8F%E5%9C%A7%E7%B8%AE" title="画像圧縮 - giapponese" lang="ja" hreflang="ja" data-title="画像圧縮" data-language-autonym="日本語" data-language-local-name="giapponese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%9D%B4%EB%AF%B8%EC%A7%80_%EC%95%95%EC%B6%95" title="이미지 압축 - coreano" lang="ko" hreflang="ko" data-title="이미지 압축" data-language-autonym="한국어" data-language-local-name="coreano" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%97%D0%B1%D0%B8%D0%B2%D0%B0%D1%9A%D0%B5_%D0%BD%D0%B0_%D1%81%D0%BB%D0%B8%D0%BA%D0%B8" title="Збивање на слики - macedone" lang="mk" hreflang="mk" data-title="Збивање на слики" data-language-autonym="Македонски" data-language-local-name="macedone" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Pemampatan_imej" title="Pemampatan imej - malese" lang="ms" hreflang="ms" data-title="Pemampatan imej" data-language-autonym="Bahasa Melayu" data-language-local-name="malese" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Beeldcompressie" title="Beeldcompressie - olandese" lang="nl" hreflang="nl" data-title="Beeldcompressie" data-language-autonym="Nederlands" data-language-local-name="olandese" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Compress%C3%A3o_de_imagens" title="Compressão de imagens - portoghese" lang="pt" hreflang="pt" data-title="Compressão de imagens" data-language-autonym="Português" data-language-local-name="portoghese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Compresia_imaginilor" title="Compresia imaginilor - rumeno" lang="ro" hreflang="ro" data-title="Compresia imaginilor" data-language-autonym="Română" data-language-local-name="rumeno" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%A1%D0%B6%D0%B0%D1%82%D0%B8%D0%B5_%D0%B8%D0%B7%D0%BE%D0%B1%D1%80%D0%B0%D0%B6%D0%B5%D0%BD%D0%B8%D0%B9" title="Сжатие изображений - russo" lang="ru" hreflang="ru" data-title="Сжатие изображений" data-language-autonym="Русский" data-language-local-name="russo" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Bildkompression" title="Bildkompression - svedese" lang="sv" hreflang="sv" data-title="Bildkompression" data-language-autonym="Svenska" data-language-local-name="svedese" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%A1%D1%82%D0%B8%D1%81%D0%BD%D0%B5%D0%BD%D0%BD%D1%8F_%D0%B7%D0%BE%D0%B1%D1%80%D0%B0%D0%B6%D0%B5%D0%BD%D1%8C" title="Стиснення зображень - ucraino" lang="uk" hreflang="uk" data-title="Стиснення зображень" data-language-autonym="Українська" data-language-local-name="ucraino" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/N%C3%A9n_%E1%BA%A3nh" title="Nén ảnh - vietnamita" lang="vi" hreflang="vi" data-title="Nén ảnh" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamita" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E5%9B%BE%E5%83%8F%E5%8E%8B%E7%BC%A9" title="图像压缩 - cinese" lang="zh" hreflang="zh" data-title="图像压缩" data-language-autonym="中文" data-language-local-name="cinese" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q412438#sitelinks-wikipedia" title="Modifica collegamenti interlinguistici" class="wbc-editpage">Modifica collegamenti</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespace"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Compressione_dell%27immagine" title="Vedi la voce [c]" accesskey="c"><span>Voce</span></a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Discussione:Compressione_dell%27immagine&action=edit&redlink=1" rel="discussion" class="new" title="Vedi le discussioni relative a questa pagina (la pagina non esiste) [t]" accesskey="t"><span>Discussione</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Cambia versione linguistica" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">italiano</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Visite"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Compressione_dell%27immagine"><span>Leggi</span></a></li><li id="ca-ve-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Compressione_dell%27immagine&veaction=edit" title="Modifica questa pagina [v]" accesskey="v"><span>Modifica</span></a></li><li id="ca-edit" class="collapsible vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Compressione_dell%27immagine&action=edit" title="Modifica il wikitesto di questa pagina [e]" accesskey="e"><span>Modifica wikitesto</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Compressione_dell%27immagine&action=history" title="Versioni precedenti di questa pagina [h]" accesskey="h"><span>Cronologia</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Strumenti pagine"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Strumenti" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Strumenti</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Strumenti</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">sposta nella barra laterale</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">nascondi</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Altre opzioni" > <div class="vector-menu-heading"> Azioni </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Compressione_dell%27immagine"><span>Leggi</span></a></li><li id="ca-more-ve-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Compressione_dell%27immagine&veaction=edit" title="Modifica questa pagina [v]" accesskey="v"><span>Modifica</span></a></li><li id="ca-more-edit" class="collapsible vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Compressione_dell%27immagine&action=edit" title="Modifica il wikitesto di questa pagina [e]" accesskey="e"><span>Modifica wikitesto</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Compressione_dell%27immagine&action=history"><span>Cronologia</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> Generale </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Speciale:PuntanoQui/Compressione_dell%27immagine" title="Elenco di tutte le pagine che sono collegate a questa [j]" accesskey="j"><span>Puntano qui</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Speciale:ModificheCorrelate/Compressione_dell%27immagine" rel="nofollow" title="Elenco delle ultime modifiche alle pagine collegate a questa [k]" accesskey="k"><span>Modifiche correlate</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Compressione_dell%27immagine&oldid=139907753" title="Collegamento permanente a questa versione di questa pagina"><span>Link permanente</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Compressione_dell%27immagine&action=info" title="Ulteriori informazioni su questa pagina"><span>Informazioni pagina</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Speciale:Cita&page=Compressione_dell%27immagine&id=139907753&wpFormIdentifier=titleform" title="Informazioni su come citare questa pagina"><span>Cita questa voce</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Speciale:UrlShortener&url=https%3A%2F%2Fit.wikipedia.org%2Fwiki%2FCompressione_dell%2527immagine"><span>Ottieni URL breve</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Speciale:QrCode&url=https%3A%2F%2Fit.wikipedia.org%2Fwiki%2FCompressione_dell%2527immagine"><span>Scarica codice QR</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Stampa/esporta </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=Speciale:Libro&bookcmd=book_creator&referer=Compressione+dell%27immagine"><span>Crea un libro</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Speciale:DownloadAsPdf&page=Compressione_dell%27immagine&action=show-download-screen"><span>Scarica come PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Compressione_dell%27immagine&printable=yes" title="Versione stampabile di questa pagina [p]" accesskey="p"><span>Versione stampabile</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> In altri progetti </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Category:Image_compression" hreflang="en"><span>Wikimedia Commons</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q412438" title="Collegamento all'elemento connesso dell'archivio dati [g]" accesskey="g"><span>Elemento Wikidata</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Strumenti pagine"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Aspetto"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Aspetto</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">sposta nella barra laterale</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">nascondi</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Da Wikipedia, l'enciclopedia libera.</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="it" dir="ltr"><figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Quality_comparison_jpg_vs_saveforweb.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/ce/Quality_comparison_jpg_vs_saveforweb.jpg/220px-Quality_comparison_jpg_vs_saveforweb.jpg" decoding="async" width="220" height="183" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/ce/Quality_comparison_jpg_vs_saveforweb.jpg/330px-Quality_comparison_jpg_vs_saveforweb.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/ce/Quality_comparison_jpg_vs_saveforweb.jpg/440px-Quality_comparison_jpg_vs_saveforweb.jpg 2x" data-file-width="6000" data-file-height="5000" /></a><figcaption>Grafico che mostra il variare della dimensione del file a seconda della qualità del jpg.</figcaption></figure> <p>La <b>compressione dell'immagine</b>, in <a href="/wiki/Elettronica" title="Elettronica">elettronica</a>, <a href="/wiki/Informatica" title="Informatica">informatica</a> e nelle <a href="/wiki/Telecomunicazioni" class="mw-redirect" title="Telecomunicazioni">telecomunicazioni</a>, è il nome generico sotto il quale si raggruppano gli <a href="/wiki/Algoritmo" title="Algoritmo">algoritmi</a> e le tecniche di <a href="/wiki/Elaborazione_digitale_delle_immagini" title="Elaborazione digitale delle immagini">elaborazione digitale delle immagini</a> appartenenti alle tecniche di <a href="/wiki/Compressione_dati" class="mw-redirect" title="Compressione dati">compressione dati</a>, che si utilizzano per ridurre le dimensioni in <a href="/wiki/Byte" title="Byte">byte</a> delle <a href="/wiki/Immagine_digitale" title="Immagine digitale">immagini digitali</a><sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-:0_2-0" class="reference"><a href="#cite_note-:0-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Descrizione">Descrizione</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Compressione_dell%27immagine&veaction=edit&section=1" title="Modifica la sezione Descrizione" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Compressione_dell%27immagine&action=edit&section=1" title="Edit section's source code: Descrizione"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Un'immagine è rappresentata in formato digitale come una serie di punti (<a href="/wiki/Pixel" title="Pixel">pixel</a>) disposti come una scacchiera o matrice (<a href="/wiki/Grafica_raster" title="Grafica raster">grafica raster</a> o <i>bitmap</i>). Ogni punto può utilizzare uno o più bit per definire il colore del punto: maggiore è il numero di colori, maggiore sarà il numero di bit necessari per codificare tutti i colori dell'immagine. Le tecniche di compressione utilizzano le peculiarità delle immagini per ridurre l'<a href="/wiki/Entropia_(teoria_dell%27informazione)" title="Entropia (teoria dell'informazione)">entropia</a> locale del file in modo da renderlo più piccolo<sup id="cite_ref-:0_2-1" class="reference"><a href="#cite_note-:0-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>. </p> <div class="mw-heading mw-heading3"><h3 id="Senza_perdita">Senza perdita</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Compressione_dell%27immagine&veaction=edit&section=2" title="Modifica la sezione Senza perdita" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Compressione_dell%27immagine&action=edit&section=2" title="Edit section's source code: Senza perdita"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Le prime tecniche di compressione erano molto semplici anche perché la potenza dei primi <a href="/wiki/Computer" title="Computer">computer</a> era limitata e quindi per ottenere tempi di decompressione accettabili queste dovevano essere necessariamente semplici. Una tecnica molto diffusa ma semplice era la <a href="/wiki/Run-length_encoding" title="Run-length encoding">Run-length encoding</a>. Questa prevedeva la memorizzazione di zone di colore uniforme tramite stringhe speciali. Per esempio se in un'immagine si trovavano mille punti dello stesso colore il programma di compressione salvava il colore in un carattere speciale e in seguito memorizzava il numero di punti da colorare con lo stesso colore; le immagini di tipo <a href="/wiki/Interchange_File_Format" title="Interchange File Format">IFF</a> venivano salvate con questo metodo. Inizialmente le immagini avevano un numero limitato di colori e quindi si utilizzavano tecniche che si avvantaggiavano di questo. Molti formati utilizzavano tecniche di compressione a dizionario come la <a href="/wiki/Lempel-Ziv-Welch" title="Lempel-Ziv-Welch">LZW</a>. Questi algoritmi costruivano dei dizionari contenenti gruppi di punti che si ripetevano frequentemente e poi memorizzavano l'immagine utilizzando il dizionario creato. Il formato <a href="/wiki/Graphics_Interchange_Format" title="Graphics Interchange Format">GIF</a> utilizza questa tecnica. È da notare che queste tecniche di compressione sono tutte <a href="/wiki/Compressione_dati_lossless" class="mw-redirect" title="Compressione dati lossless">senza perdita di informazione</a><sup id="cite_ref-:1_4-0" class="reference"><a href="#cite_note-:1-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-:2_5-0" class="reference"><a href="#cite_note-:2-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup>. </p><p>Tra i formati lossless si ricordano<sup id="cite_ref-:3_6-0" class="reference"><a href="#cite_note-:3-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup>: </p> <ul><li><a href="/wiki/Portable_Network_Graphics" title="Portable Network Graphics">png</a> (certe applicazioni permettono anche la scrittura di file png non compressi);</li> <li><a href="/wiki/TGA_(formato_di_file)" class="mw-redirect" title="TGA (formato di file)">tga</a>;</li> <li><a href="/wiki/Tagged_Image_File_Format" class="mw-redirect" title="Tagged Image File Format">tiff</a> (sebbene questo sia l'uso più comune, questo formato permette diversi tipi di compressione);</li> <li><a href="/wiki/Graphics_Interchange_Format" title="Graphics Interchange Format">gif</a> (per immagini fino a 256 colori).</li></ul> <div class="mw-heading mw-heading3"><h3 id="Con_perdita">Con perdita</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Compressione_dell%27immagine&veaction=edit&section=3" title="Modifica la sezione Con perdita" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Compressione_dell%27immagine&action=edit&section=3" title="Edit section's source code: Con perdita"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Con il crescere della potenza di calcolo dei <a href="/wiki/Computer" title="Computer">computer</a> questi sono stati in grado di gestire immagini con migliaia o milioni di colori. Immagini con così tanti colori erano gestite male dai classici metodi di compressione dato che l'assunto del ridotto numero di colori falliva. Vennero sviluppate nuove tecniche di compressione, principalmente a <a href="/wiki/Compressione_dati_lossy" title="Compressione dati lossy">perdita di informazione</a>. Queste nuove tecniche permettevano compressioni anche del 50% con il mantenimento di una qualità accettabile. </p><p>Tra i vari metodi il più diffuso divenne il <a href="/wiki/JPEG" title="JPEG">JPEG</a> che utilizza varie tecniche di compressione combinandole tra loro per ottenere compressioni molto elevate. Tra le tecniche utilizzate quella responsabile della maggior compressione (e della perdita di qualità) è la <a href="/wiki/Trasformata_discreta_del_coseno" title="Trasformata discreta del coseno">trasformata discreta del coseno</a> la quale converte i punti dello schermo nella loro equivalente rappresentazione nel <a href="/wiki/Dominio_della_frequenza" title="Dominio della frequenza">dominio della frequenza</a>. Il segnale risultante è formato da segnali a bassa frequenza e segnali ad alta frequenza: i segnali a bassa frequenza rappresentano le zone di colore uniformi dell'immagine mentre le componenti ad alta frequenza rappresentano i particolari dell'immagine e i disturbi di <a href="/wiki/Quantizzazione_(elettronica)" title="Quantizzazione (elettronica)">quantizzazione</a>. La compressione JPEG provvede a salvare le componenti a bassa frequenza e una parte delle componenti ad alta frequenza. Più si incrementa la qualità più componenti vengono salvate e nel contempo più il file diventa grande. </p><p>Il successo dello standard JPEG spinse molte società e consorzi a sviluppare soluzioni basate sulla perdita di compressione, ma con fattori di compressione maggiore del JPEG a parità di qualità ottenuta. Questi formati fanno uso di tecniche matematiche molto avanzate come la <a href="/wiki/Compressione_frattale" title="Compressione frattale">compressione frattale</a> o quella basata sulle trasformate <a href="/wiki/Wavelet" title="Wavelet">Wavelet</a> (<a href="/wiki/JPEG_2000" title="JPEG 2000">JPEG 2000</a>)<sup id="cite_ref-:1_4-1" class="reference"><a href="#cite_note-:1-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-:2_5-1" class="reference"><a href="#cite_note-:2-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup>. </p><p>Tra i formati lossy si ricordano<sup id="cite_ref-:3_6-1" class="reference"><a href="#cite_note-:3-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup>: </p> <ul><li><a href="/wiki/Joint_Photographic_Experts_Group" class="mw-redirect" title="Joint Photographic Experts Group">jpeg</a>;</li> <li><a href="/wiki/Graphics_Interchange_Format" title="Graphics Interchange Format">gif</a> (per immagini con più di 256 colori si ottiene una compressione lossy poiché vengono eliminate la maggior parte delle sfumature di colore).</li></ul> <div class="mw-heading mw-heading2"><h2 id="Esempi">Esempi</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Compressione_dell%27immagine&veaction=edit&section=4" title="Modifica la sezione Esempi" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Compressione_dell%27immagine&action=edit&section=4" title="Edit section's source code: Esempi"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul class="gallery mw-gallery-traditional"> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Compression_Ephesos.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/18/Compression_Ephesos.jpg/120px-Compression_Ephesos.jpg" decoding="async" width="120" height="19" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/18/Compression_Ephesos.jpg/180px-Compression_Ephesos.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/18/Compression_Ephesos.jpg/240px-Compression_Ephesos.jpg 2x" data-file-width="2009" data-file-height="310" /></a></span></div> <div class="gallerytext"></div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Compression.artifacts.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/80/Compression.artifacts.jpg/120px-Compression.artifacts.jpg" decoding="async" width="120" height="60" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/80/Compression.artifacts.jpg/180px-Compression.artifacts.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/80/Compression.artifacts.jpg/240px-Compression.artifacts.jpg 2x" data-file-width="1024" data-file-height="512" /></a></span></div> <div class="gallerytext"></div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:JPEG_compression_Example.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b2/JPEG_compression_Example.jpg/120px-JPEG_compression_Example.jpg" decoding="async" width="120" height="90" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b2/JPEG_compression_Example.jpg/180px-JPEG_compression_Example.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b2/JPEG_compression_Example.jpg/240px-JPEG_compression_Example.jpg 2x" data-file-width="1000" data-file-height="750" /></a></span></div> <div class="gallerytext"></div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Quadtree_compression_of_an_image.gif" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d7/Quadtree_compression_of_an_image.gif/120px-Quadtree_compression_of_an_image.gif" decoding="async" width="120" height="60" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d7/Quadtree_compression_of_an_image.gif/250px-Quadtree_compression_of_an_image.gif 1.5x" data-file-width="1050" data-file-height="525" /></a></span></div> <div class="gallerytext"></div> </li> </ul> <div class="mw-heading mw-heading2"><h2 id="Note">Note</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Compressione_dell%27immagine&veaction=edit&section=5" title="Modifica la sezione Note" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Compressione_dell%27immagine&action=edit&section=5" title="Edit section's source code: Note"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><a href="#cite_ref-1"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="https://prever.edu.it/comprever/libanore/compressione-e-formato-delle-immagini/"><span style="font-style:italic;">Compressione e formato delle immagini – Informatica a Osasco</span></a>, su <span style="font-style:italic;">prever.edu.it</span>. <small>URL consultato il 31 ottobre 2021</small>.</cite></span> </li> <li id="cite_note-:0-2"><span class="mw-cite-backlink"><b>^</b> <sup><i><a href="#cite_ref-:0_2-0">a</a></i></sup> <sup><i><a href="#cite_ref-:0_2-1">b</a></i></sup></span> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="http://www.ibneditore.it/wp-content/uploads/_mat_online/elettrotecnica_elettronica/COMPRESSIONE.pdf"><span style="font-style:italic;">ibneditore.it</span></a> (<span style="font-weight: bolder; font-size:80%"><abbr title="documento in formato PDF">PDF</abbr></span>).</cite></span> </li> <li id="cite_note-3"><a href="#cite_ref-3"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="http://user.engineering.uiowa.edu/~dip/lecture/DataCompression.html"><span style="font-style:italic;">Image Data Compression</span></a>, su <span style="font-style:italic;">user.engineering.uiowa.edu</span>.</cite></span> </li> <li id="cite_note-:1-4"><span class="mw-cite-backlink"><b>^</b> <sup><i><a href="#cite_ref-:1_4-0">a</a></i></sup> <sup><i><a href="#cite_ref-:1_4-1">b</a></i></sup></span> <span class="reference-text"><cite class="citation web" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) <a rel="nofollow" class="external text" href="https://www.video-corsi.com/fotografia-online/compressione_e_formato_immagine.htm"><span style="font-style:italic;">Differenze tra Compressione e formato immagine ing. Davide Copelli</span></a>, su <span style="font-style:italic;">Video-Corsi.com</span>. <small>URL consultato il 31 ottobre 2021</small>.</cite></span> </li> <li id="cite_note-:2-5"><span class="mw-cite-backlink"><b>^</b> <sup><i><a href="#cite_ref-:2_5-0">a</a></i></sup> <sup><i><a href="#cite_ref-:2_5-1">b</a></i></sup></span> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="https://tecnologia.libero.it/file-multimediali-lossy-e-lossless-differenze-jpg-e-png-o-mp3-e-flac-14259"><span style="font-style:italic;">File multimediali lossy e lossless: differenze JPG e PNG o MP3 e FLAC</span></a>, su <span style="font-style:italic;">tecnologia.libero.it</span>. <small>URL consultato il 31 ottobre 2021</small>.</cite></span> </li> <li id="cite_note-:3-6"><span class="mw-cite-backlink"><b>^</b> <sup><i><a href="#cite_ref-:3_6-0">a</a></i></sup> <sup><i><a href="#cite_ref-:3_6-1">b</a></i></sup></span> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="http://www.di-srv.unisa.it/~ads/TesineAsd2/Introduzione/testo3.htm"><span style="font-style:italic;">Algoritmi Losseless e Lossy</span></a>, su <span style="font-style:italic;">www.di-srv.unisa.it</span>. <small>URL consultato il 31 ottobre 2021</small>.</cite></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Voci_correlate">Voci correlate</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Compressione_dell%27immagine&veaction=edit&section=6" title="Modifica la sezione Voci correlate" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Compressione_dell%27immagine&action=edit&section=6" title="Edit section's source code: Voci correlate"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Posterizzazione" title="Posterizzazione">Posterizzazione</a></li> <li><a href="/wiki/JPEG2000" class="mw-redirect" title="JPEG2000">JPEG2000</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Altri_progetti">Altri progetti</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Compressione_dell%27immagine&veaction=edit&section=7" title="Modifica la sezione Altri progetti" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Compressione_dell%27immagine&action=edit&section=7" title="Edit section's source code: Altri progetti"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div id="interProject" class="toccolours" style="display: none; clear: both; margin-top: 2em"><p id="sisterProjects" style="background-color: #efefef; color: black; font-weight: bold; margin: 0"><span>Altri progetti</span></p><ul title="Collegamenti verso gli altri progetti Wikimedia"> <li class="" title=""><span class="plainlinks" title="commons:Category:Image compression"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Image_compression?uselang=it">Wikimedia Commons</a></span></li></ul></div> <ul><li><span typeof="mw:File"><a href="https://commons.wikimedia.org/wiki/?uselang=it" title="Collabora a Wikimedia Commons"><img alt="Collabora a Wikimedia Commons" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png" decoding="async" width="18" height="24" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/27px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/36px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span> <span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/?uselang=it">Wikimedia Commons</a></span> contiene immagini o altri file sulla <b><span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Image_compression?uselang=it">compressione dell'immagine</a></span></b></li></ul> <div class="mw-heading mw-heading2"><h2 id="Collegamenti_esterni">Collegamenti esterni</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Compressione_dell%27immagine&veaction=edit&section=8" title="Modifica la sezione Collegamenti esterni" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Compressione_dell%27immagine&action=edit&section=8" title="Edit section's source code: Collegamenti esterni"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li class="mw-empty-elt"></li> <li><cite id="CITEREFOpen_Library" class="citation web" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) <a rel="nofollow" class="external text" href="https://openlibrary.org/subjects/image_compression"><span style="font-style:italic;">Opere riguardanti Image compression</span></a>, su <span style="font-style:italic;"><a href="/wiki/Open_Library" class="mw-redirect" title="Open Library">Open Library</a></span>, <a href="/wiki/Internet_Archive" title="Internet Archive">Internet Archive</a>.</cite> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q412438#P3847" title="Modifica su Wikidata"><img alt="Modifica su Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/15px-Blue_pencil.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/20px-Blue_pencil.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></li> <li><cite class="citation web" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) <a rel="nofollow" class="external text" href="https://videocodecs.blogspot.com/2007/05/image-coding-fundamentals_08.html"><span style="font-style:italic;">Fondamenti sulla codifica delle immagini</span></a>, su <span style="font-style:italic;">videocodecs.blogspot.com</span>.</cite></li> <li>(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) <a rel="nofollow" class="external text" href="http://www.mvnet.fi/index.php?osio=Tutkielmat&luokka=Yliopisto&sivu=Image_compression">Uno studio sulla compressione delle immagini</a> (JPEG2000, JPEG, ...)</li> <li>(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) <a rel="nofollow" class="external text" href="http://dvd-hq.info/data_compression.php">Tecniche base sulla compressione dei dati</a> (PNG, JPEG e JPEG-2000)</li></ul> <style data-mw-deduplicate="TemplateStyles:r141815314">.mw-parser-output .navbox{border:1px solid #aaa;clear:both;margin:auto;padding:2px;width:100%}.mw-parser-output .navbox th{padding-left:1em;padding-right:1em;text-align:center}.mw-parser-output .navbox>tbody>tr:first-child>th{background:#ccf;font-size:90%;width:100%;color:var(--color-base,black)}.mw-parser-output .navbox_navbar{float:left;margin:0;padding:0 10px 0 0;text-align:left;width:6em}.mw-parser-output .navbox_title{font-size:110%}.mw-parser-output .navbox_abovebelow{background:#ddf;font-size:90%;font-weight:normal}.mw-parser-output .navbox_group{background:#ddf;font-size:90%;padding:0 10px;white-space:nowrap}.mw-parser-output .navbox_list{font-size:90%;width:100%}.mw-parser-output .navbox_list a{white-space:nowrap}html:not(.vector-feature-night-mode-enabled) .mw-parser-output .navbox_odd{background:#fdfdfd;color:var(--color-base,black)}html:not(.vector-feature-night-mode-enabled) .mw-parser-output .navbox_even{background:#f7f7f7;color:var(--color-base,black)}.mw-parser-output .navbox a.mw-selflink{color:var(--color-base,black)}.mw-parser-output .navbox_center{text-align:center}.mw-parser-output .navbox .navbox_image{padding-left:7px;vertical-align:middle;width:0}.mw-parser-output .navbox+.navbox{margin-top:-1px}.mw-parser-output .navbox .mw-collapsible-toggle{font-weight:normal;text-align:right;width:7em}body.skin--responsive .mw-parser-output .navbox_image img{max-width:none!important}.mw-parser-output .subnavbox{margin:-3px;width:100%}.mw-parser-output .subnavbox_group{background:#e6e6ff;padding:0 10px}@media screen{html.skin-theme-clientpref-night .mw-parser-output .navbox>tbody>tr:first-child>th{background:var(--background-color-interactive)!important}html.skin-theme-clientpref-night .mw-parser-output .navbox th{color:var(--color-base)!important}html.skin-theme-clientpref-night .mw-parser-output .navbox_abovebelow,html.skin-theme-clientpref-night .mw-parser-output .navbox_group{background:var(--background-color-interactive-subtle)!important}html.skin-theme-clientpref-night .mw-parser-output .subnavbox_group{background:var(--background-color-neutral-subtle)!important}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbox>tbody>tr:first-child>th{background:var(--background-color-interactive)!important}html.skin-theme-clientpref-os .mw-parser-output .navbox th{color:var(--color-base)!important}html.skin-theme-clientpref-os .mw-parser-output .navbox_abovebelow,html.skin-theme-clientpref-os .mw-parser-output .navbox_group{background:var(--background-color-interactive-subtle)!important}html.skin-theme-clientpref-os .mw-parser-output .subnavbox_group{background:var(--background-color-neutral-subtle)!important}}</style><table class="navbox mw-collapsible mw-collapsed noprint metadata" id="navbox-Formati_di_compressione"><tbody><tr><th colspan="2"><div class="navbox_navbar"><div class="noprint plainlinks" style="background-color:transparent; padding:0; font-size:xx-small; color:var(--color-base, #000000); white-space:nowrap;"><a href="/wiki/Template:Formati_di_compressione" title="Template:Formati di compressione"><span title="Vai alla pagina del template">V</span></a> · <a href="/wiki/Discussioni_template:Formati_di_compressione" title="Discussioni template:Formati di compressione"><span title="Discuti del template">D</span></a> · <a class="external text" href="https://it.wikipedia.org/w/index.php?title=Template:Formati_di_compressione&action=edit"><span title="Modifica il template. Usa l'anteprima prima di salvare">M</span></a></div></div><span class="navbox_title">Standard di <a href="/wiki/Compressione_dei_dati" title="Compressione dei dati">compressione dei dati</a> per il <a href="/wiki/Multimedialit%C3%A0" title="Multimedialità">multimedia</a></span></th></tr><tr><th colspan="1" class="navbox_group"><a href="/wiki/Compressione_video_digitale" title="Compressione video digitale">Video</a></th><td colspan="1" class="navbox_list navbox_odd"><table class="subnavbox"><tbody><tr><th class="subnavbox_group" style="width:7em;"><a href="/wiki/Organizzazione_internazionale_per_la_normazione" title="Organizzazione internazionale per la normazione">ISO</a>/<a href="/wiki/Commissione_elettrotecnica_internazionale" title="Commissione elettrotecnica internazionale">IEC</a></th><td colspan="1" style="width:auto; text-align:left;"><a href="/wiki/Motion_JPEG" title="Motion JPEG">Motion JPEG</a><b> ·</b> <a href="/wiki/JPEG_2000#Motion_JPEG_2000" title="JPEG 2000">Motion JPEG 2000</a><b> ·</b> <a href="/wiki/MPEG-1" title="MPEG-1">MPEG-1</a><b> ·</b> <a href="/wiki/MPEG-2" title="MPEG-2">MPEG-2</a><b> ·</b> <a href="/wiki/MPEG-4" title="MPEG-4">MPEG-4 ASP</a><b> ·</b> <a href="/wiki/H.264" title="H.264">MPEG-4 AVC</a><b> ·</b> <a href="/wiki/Multiview_Video_Coding" title="Multiview Video Coding">MVC</a><b> ·</b> <a href="/wiki/High_Efficiency_Video_Coding" title="High Efficiency Video Coding">MPEG-H Part 2 / HEVC</a><b> ·</b> <a href="/w/index.php?title=Versatile_Video_Codec&action=edit&redlink=1" class="new" title="Versatile Video Codec (la pagina non esiste)">MPEG-I Part 3 / VVC</a><b> ·</b> <a href="/w/index.php?title=MPEG-5&action=edit&redlink=1" class="new" title="MPEG-5 (la pagina non esiste)">MPEG-5</a> (<a href="/w/index.php?title=Essential_Video_Coding&action=edit&redlink=1" class="new" title="Essential Video Coding (la pagina non esiste)">Part1/EVC</a><b> ·</b> <a href="/w/index.php?title=LCEVC&action=edit&redlink=1" class="new" title="LCEVC (la pagina non esiste)">Part2/LC EVC</a>)</td></tr><tr><th class="subnavbox_group" style="width:7em;"><a href="/wiki/ITU-T" title="ITU-T">ITU-T</a></th><td colspan="1" style="width:auto; text-align:left;"><a href="/wiki/H.120" title="H.120">H.120</a><b> ·</b> <a href="/wiki/H.261" title="H.261">H.261</a><b> ·</b> <a href="/wiki/H.262" title="H.262">H.262</a><b> ·</b> <a href="/wiki/H.263" title="H.263">H.263</a><b> ·</b> <a href="/wiki/H.264" title="H.264">H.264</a><b> ·</b> <a href="/wiki/High_Efficiency_Video_Coding" title="High Efficiency Video Coding">H.265</a><b> ·</b> <a href="/w/index.php?title=Versatile_Video_Codec&action=edit&redlink=1" class="new" title="Versatile Video Codec (la pagina non esiste)">H.266</a><b> ·</b> <a href="/w/index.php?title=Enhanced_Coding_Model&action=edit&redlink=1" class="new" title="Enhanced Coding Model (la pagina non esiste)">H.267</a></td></tr><tr><th class="subnavbox_group" style="width:7em;">altro</th><td colspan="1" style="width:auto; text-align:left;"><a href="/w/index.php?title=AMV_(formato_video)&action=edit&redlink=1" class="new" title="AMV (formato video) (la pagina non esiste)">AMV</a><b> ·</b> <a href="/wiki/AOMedia_Video_1" title="AOMedia Video 1">AV1</a><b> ·</b> <a href="/wiki/Audio_Video_Standard" title="Audio Video Standard">AVS</a><b> ·</b> <a href="/wiki/Bink_Video" title="Bink Video">Bink</a><b> ·</b> <a href="/w/index.php?title=Daala_(codec_video)&action=edit&redlink=1" class="new" title="Daala (codec video) (la pagina non esiste)">Daala</a><b> ·</b> <a href="/w/index.php?title=Dirac_(codec_video)&action=edit&redlink=1" class="new" title="Dirac (codec video) (la pagina non esiste)">Dirac</a><b> ·</b> <a href="/wiki/DNxHD" title="DNxHD">DNxHD</a><b> ·</b> <a href="/wiki/FFV1" title="FFV1">FFV1</a><b> ·</b> <a href="/wiki/Huffyuv" title="Huffyuv">Huffyuv</a><b> ·</b> <a href="/wiki/Indeo_Video" title="Indeo Video">Indeo</a><b> ·</b> <a href="/wiki/Pixlet" title="Pixlet">Pixlet</a><b> ·</b> <a href="/wiki/ProRes" title="ProRes">ProRes</a><b> ·</b> <a href="/wiki/RealVideo" title="RealVideo">RealVideo</a><b> ·</b> <a href="/w/index.php?title=RTVideo&action=edit&redlink=1" class="new" title="RTVideo (la pagina non esiste)">RTVideo</a><b> ·</b> <a href="/w/index.php?title=SheerVideo&action=edit&redlink=1" class="new" title="SheerVideo (la pagina non esiste)">SheerVideo</a><b> ·</b> <a href="/w/index.php?title=Smacker_video&action=edit&redlink=1" class="new" title="Smacker video (la pagina non esiste)">Smacker</a><b> ·</b> <a href="/w/index.php?title=Snow_(codec)&action=edit&redlink=1" class="new" title="Snow (codec) (la pagina non esiste)">Snow</a><b> ·</b> <a href="/wiki/Codec_Sorenson" title="Codec Sorenson">Sorenson</a><b> ·</b> <a href="/wiki/Theora" title="Theora">Theora</a><b> ·</b> <a href="/wiki/VC-1" title="VC-1">VC-1</a><b> ·</b> <a href="/wiki/VP6" title="VP6">VP6</a><b> ·</b> <a href="/wiki/VP7" title="VP7">VP7</a><b> ·</b> <a href="/wiki/VP8" title="VP8">VP8</a><b> ·</b> <a href="/wiki/VP9" title="VP9">VP9</a><b> ·</b> <a href="/wiki/Windows_Media_Video" title="Windows Media Video">WMV</a></td></tr></tbody></table></td></tr><tr><th colspan="1" class="navbox_group"><a href="/wiki/Compressione_audio_digitale" title="Compressione audio digitale">Audio</a></th><td colspan="1" class="navbox_list navbox_even"><table class="subnavbox"><tbody><tr><th class="subnavbox_group" style="width:7em;"><a href="/wiki/ISO" class="mw-redirect" title="ISO">ISO</a>/<a href="/wiki/Commissione_elettrotecnica_internazionale" title="Commissione elettrotecnica internazionale">IEC</a></th><td colspan="1" style="width:auto; text-align:left;"><a href="/wiki/Advanced_Audio_Coding" title="Advanced Audio Coding">AAC</a><b> ·</b> <a href="/w/index.php?title=HE-AAC&action=edit&redlink=1" class="new" title="HE-AAC (la pagina non esiste)">HE-AAC</a><b> ·</b> <a href="/w/index.php?title=HE-AAC_v2&action=edit&redlink=1" class="new" title="HE-AAC v2 (la pagina non esiste)">HE-AAC v2</a><b> ·</b> <a href="/wiki/MPEG-1_Layer_I" title="MPEG-1 Layer I">MPEG-1 Layer I</a><b> ·</b> <a href="/wiki/MPEG-1_Layer_II" title="MPEG-1 Layer II">MPEG-1 Layer II</a><b> ·</b> <a href="/wiki/MP3" title="MP3">MPEG-1 Layer III (MP3)</a><b> ·</b> <a href="/w/index.php?title=MPEG-2_Layer_I&action=edit&redlink=1" class="new" title="MPEG-2 Layer I (la pagina non esiste)">MPEG-2 Layer I</a><b> ·</b> <a href="/w/index.php?title=MPEG-2_Layer_II&action=edit&redlink=1" class="new" title="MPEG-2 Layer II (la pagina non esiste)">MPEG-2 Layer II</a><b> ·</b> <a href="/wiki/MP3" title="MP3">MPEG-2 Layer III (MP3)</a></td></tr><tr><th class="subnavbox_group" style="width:7em;"><a href="/wiki/ITU-T" title="ITU-T">ITU-T</a></th><td colspan="1" style="width:auto; text-align:left;"><a href="/wiki/G.711" title="G.711">G.711</a><b> ·</b> <a href="/wiki/G.722" title="G.722">G.722</a><b> ·</b> <a href="/w/index.php?title=G.722.1&action=edit&redlink=1" class="new" title="G.722.1 (la pagina non esiste)">G.722.1</a><b> ·</b> <a href="/w/index.php?title=G.722.2&action=edit&redlink=1" class="new" title="G.722.2 (la pagina non esiste)">G.722.2</a><b> ·</b> <a href="/wiki/G.723" title="G.723">G.723</a><b> ·</b> <a href="/w/index.php?title=G.723.1&action=edit&redlink=1" class="new" title="G.723.1 (la pagina non esiste)">G.723.1</a><b> ·</b> <a href="/w/index.php?title=G.726&action=edit&redlink=1" class="new" title="G.726 (la pagina non esiste)">G.726</a><b> ·</b> <a href="/w/index.php?title=G.728&action=edit&redlink=1" class="new" title="G.728 (la pagina non esiste)">G.728</a><b> ·</b> <a href="/wiki/G.729" title="G.729">G.729</a><b> ·</b> <a href="/w/index.php?title=G.729.1&action=edit&redlink=1" class="new" title="G.729.1 (la pagina non esiste)">G.729.1</a><b> ·</b> <a href="/w/index.php?title=G.729a&action=edit&redlink=1" class="new" title="G.729a (la pagina non esiste)">G.729a</a></td></tr><tr><th class="subnavbox_group" style="width:7em;">altro</th><td colspan="1" style="width:auto; text-align:left;"><a href="/wiki/Dolby_Digital" title="Dolby Digital">AC3</a><b> ·</b> <a href="/wiki/Adaptive_Multi-Rate" title="Adaptive Multi-Rate">AMR</a><b> ·</b> <a href="/wiki/Apple_Lossless_Encoding" title="Apple Lossless Encoding">Apple Lossless</a><b> ·</b> <a href="/wiki/AptX" title="AptX">aptX</a><b> ·</b> <a href="/wiki/ATRAC" title="ATRAC">ATRAC</a><b> ·</b> <a href="/w/index.php?title=Constrained_Energy_Lapped_Transform&action=edit&redlink=1" class="new" title="Constrained Energy Lapped Transform (la pagina non esiste)">CELT</a><b> ·</b> <a href="/wiki/Free_Lossless_Audio_Codec" title="Free Lossless Audio Codec">FLAC</a><b> ·</b> <a href="/wiki/Internet_Low_Bit_Rate_Codec" title="Internet Low Bit Rate Codec">iLBC</a><b> ·</b> <a href="/wiki/Monkey%27s_Audio" title="Monkey's Audio">Monkey's Audio</a><b> ·</b> <a href="/w/index.php?title=%CE%9C-law_algorithm&action=edit&redlink=1" class="new" title="Μ-law algorithm (la pagina non esiste)">μ-law</a><b> ·</b> <a href="/wiki/Musepack" title="Musepack">Musepack</a><b> ·</b> <a href="/w/index.php?title=Nellymoser_Asao_Codec_in_Flash&action=edit&redlink=1" class="new" title="Nellymoser Asao Codec in Flash (la pagina non esiste)">Nellymoser</a><b> ·</b> <a href="/w/index.php?title=OptimFROG&action=edit&redlink=1" class="new" title="OptimFROG (la pagina non esiste)">OptimFROG</a><b> ·</b> <a href="/wiki/Opus_(codec_audio)" title="Opus (codec audio)">Opus</a><b> ·</b> <a href="/wiki/RealAudio" title="RealAudio">RealAudio</a><b> ·</b> <a href="/w/index.php?title=RTAudio&action=edit&redlink=1" class="new" title="RTAudio (la pagina non esiste)">RTAudio</a><b> ·</b> <a href="/w/index.php?title=Shorten&action=edit&redlink=1" class="new" title="Shorten (la pagina non esiste)">SHN</a><b> ·</b> <a href="/wiki/SILK" title="SILK">SILK</a><b> ·</b> <a href="/w/index.php?title=Siren_Codec&action=edit&redlink=1" class="new" title="Siren Codec (la pagina non esiste)">Siren</a><b> ·</b> <a href="/wiki/Speex" title="Speex">Speex</a><b> ·</b> <a href="/w/index.php?title=TAK_(audio_codec)&action=edit&redlink=1" class="new" title="TAK (audio codec) (la pagina non esiste)">TAK</a><b> ·</b> <a href="/wiki/Vorbis" title="Vorbis">Vorbis</a><b> ·</b> <a href="/w/index.php?title=WavPack&action=edit&redlink=1" class="new" title="WavPack (la pagina non esiste)">WavPack</a><b> ·</b> <a href="/wiki/Windows_Media_Audio" title="Windows Media Audio">WMA</a></td></tr></tbody></table></td></tr><tr><th colspan="1" class="navbox_group"><a class="mw-selflink selflink">Immagine</a></th><td colspan="1" class="navbox_list navbox_odd"><table class="subnavbox"><tbody><tr><th class="subnavbox_group" style="width:7em;"><a href="/wiki/ISO" class="mw-redirect" title="ISO">ISO</a>/<a href="/wiki/Commissione_elettrotecnica_internazionale" title="Commissione elettrotecnica internazionale">IEC</a>/<a href="/wiki/ITU-T" title="ITU-T">ITU-T</a></th><td colspan="1" style="width:auto; text-align:left;"><a href="/wiki/High_Efficiency_Image_File_Format" title="High Efficiency Image File Format">HEIF</a><b> ·</b> <a href="/wiki/JPEG" title="JPEG">JPEG</a><b> ·</b> <a href="/wiki/JPEG_2000" title="JPEG 2000">JPEG 2000</a><b> ·</b> <a href="/wiki/JPEG_XL" title="JPEG XL">JPEG XL</a><b> ·</b> <a href="/w/index.php?title=JBIG&action=edit&redlink=1" class="new" title="JBIG (la pagina non esiste)">JBIG</a><b> ·</b> <a href="/w/index.php?title=JBIG2&action=edit&redlink=1" class="new" title="JBIG2 (la pagina non esiste)">JBIG2</a><b> ·</b> <a href="/w/index.php?title=Lossless_JPEG&action=edit&redlink=1" class="new" title="Lossless JPEG (la pagina non esiste)">lossless JPEG</a><b> ·</b> <a href="/wiki/Portable_Network_Graphics" title="Portable Network Graphics">PNG</a><b> ·</b> <a href="/w/index.php?title=Multiple_image_Network_Graphics&action=edit&redlink=1" class="new" title="Multiple image Network Graphics (la pagina non esiste)">MNG</a></td></tr><tr><th class="subnavbox_group" style="width:7em;">altro</th><td colspan="1" style="width:auto; text-align:left;"><a href="/wiki/Windows_bitmap" title="Windows bitmap">BMP</a><b> ·</b> <a href="/wiki/FXG" title="FXG">FXG</a><b> ·</b> <a href="/wiki/Graphics_Interchange_Format" title="Graphics Interchange Format">GIF</a><b> ·</b> <a href="/wiki/ICER" title="ICER">ICER</a><b> ·</b> <a href="/w/index.php?title=ILBM&action=edit&redlink=1" class="new" title="ILBM (la pagina non esiste)">ILBM</a><b> ·</b> <a href="/wiki/Truevision_TGA" title="Truevision TGA">TGA</a><b> ·</b> <a href="/wiki/Codec_JPDP" title="Codec JPDP">JPDP</a><b> ·</b> <a href="/wiki/JPEG_XR" title="JPEG XR">JPEG XR/HD Photo</a><b> ·</b> <a href="/wiki/Apple_Icon_Image" title="Apple Icon Image">ICNS</a><b> ·</b> <a href="/wiki/OpenEXR" title="OpenEXR">OpenEXR</a><b> ·</b> <a href="/wiki/OpenRaster" title="OpenRaster">OpenRaster</a><b> ·</b> <a href="/wiki/PCX" title="PCX">PCX</a><b> ·</b> <a href="/w/index.php?title=Progressive_Graphics_File&action=edit&redlink=1" class="new" title="Progressive Graphics File (la pagina non esiste)">PGF</a><b> ·</b> <a href="/wiki/PSD_(formato_di_file)" title="PSD (formato di file)">PSD</a><b> ·</b> <a href="/wiki/Tag_Image_File_Format" title="Tag Image File Format">TIFF</a><b> ·</b> <a href="/w/index.php?title=Wireless_Application_Protocol_Bitmap_Format&action=edit&redlink=1" class="new" title="Wireless Application Protocol Bitmap Format (la pagina non esiste)">WBMP</a><b> ·</b> <a href="/wiki/WebP" title="WebP">WebP</a></td></tr></tbody></table></td></tr><tr><th colspan="1" class="navbox_group"><a href="/wiki/Formato_contenitore" title="Formato contenitore">Contenitore</a></th><td colspan="1" class="navbox_list navbox_even"><table class="subnavbox"><tbody><tr><th class="subnavbox_group" style="width:7em;">generico</th><td colspan="1" style="width:auto; text-align:left;"><a href="/wiki/3gp" title="3gp">3gp</a><b> ·</b> <a href="/wiki/Advanced_Systems_Format" title="Advanced Systems Format">ASF</a><b> ·</b> <a href="/wiki/Audio_Video_Interleave" title="Audio Video Interleave">AVI</a><b> ·</b> <a href="/wiki/Bink_Video" title="Bink Video">Bink</a><b> ·</b> <a href="/w/index.php?title=DivX_Media_Format&action=edit&redlink=1" class="new" title="DivX Media Format (la pagina non esiste)">DMF</a><b> ·</b> <a href="/wiki/Digital_Picture_Exchange" title="Digital Picture Exchange">DPX</a><b> ·</b> <a href="/wiki/Adobe_Flash" title="Adobe Flash">FLV</a><b> ·</b> <a href="/wiki/.m2ts" title=".m2ts">M2TS</a><b> ·</b> <a href="/wiki/Matroska" title="Matroska">Matroska</a><b> ·</b> <a href="/wiki/MOD_e_TOD" title="MOD e TOD">MOD</a><b> ·</b> <a href="/wiki/MPEG-4" title="MPEG-4">MP4</a><b> ·</b> <a href="/w/index.php?title=Media_Exchange_Format&action=edit&redlink=1" class="new" title="Media Exchange Format (la pagina non esiste)">MXF</a><b> ·</b> <a href="/w/index.php?title=NUT_(formato_di_file)&action=edit&redlink=1" class="new" title="NUT (formato di file) (la pagina non esiste)">NUT</a><b> ·</b> <a href="/wiki/Ogg" title="Ogg">Ogg</a><b> ·</b> <a href="/wiki/QuickTime_File_Format" title="QuickTime File Format">QuickTime</a><b> ·</b> <a href="/wiki/RealMedia" title="RealMedia">RealMedia</a><b> ·</b> <a href="/w/index.php?title=Smacker_video&action=edit&redlink=1" class="new" title="Smacker video (la pagina non esiste)">Smacker</a><b> ·</b> <a href="/w/index.php?title=Resource_Interchange_File_Format&action=edit&redlink=1" class="new" title="Resource Interchange File Format (la pagina non esiste)">RIFF</a><b> ·</b> <a href="/wiki/MOD_e_TOD" title="MOD e TOD">TOD</a><b> ·</b> <a href="/wiki/VOB" title="VOB">VOB</a><b> ·</b> <a href="/wiki/WebM" title="WebM">WebM</a></td></tr><tr><th class="subnavbox_group" style="width:7em;">solo audio</th><td colspan="1" style="width:auto; text-align:left;"><a href="/wiki/Audio_Interchange_File_Format" title="Audio Interchange File Format">AIFF</a><b> ·</b> <a href="/wiki/Formato_file_.au" title="Formato file .au">AU</a><b> ·</b> <a href="/wiki/Waveform_Audio_File_Format" title="Waveform Audio File Format">WAV</a><b> ·</b> <a href="/wiki/Broadcast_Wave_Format" title="Broadcast Wave Format">BWF</a><b> ·</b> <a href="/wiki/RF64" title="RF64">RF64</a></td></tr></tbody></table></td></tr></tbody></table> <div class="noprint" style="width:100%; padding: 3px 0; display: flex; flex-wrap: wrap; row-gap: 4px; column-gap: 8px; box-sizing: border-box;"><div style="flex-grow: 1"><style data-mw-deduplicate="TemplateStyles:r140555418">.mw-parser-output .itwiki-template-occhiello{width:100%;line-height:25px;border:1px solid #CCF;background-color:#F0EEFF;box-sizing:border-box}.mw-parser-output .itwiki-template-occhiello-progetto{background-color:#FAFAFA}@media screen{html.skin-theme-clientpref-night .mw-parser-output .itwiki-template-occhiello{background-color:#202122;border-color:#54595D}html.skin-theme-clientpref-night .mw-parser-output .itwiki-template-occhiello-progetto{background-color:#282929}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .itwiki-template-occhiello{background-color:#202122;border-color:#54595D}html.skin-theme-clientpref-os .mw-parser-output .itwiki-template-occhiello-progetto{background-color:#282929}}</style><div class="itwiki-template-occhiello"><span class="noviewer" typeof="mw:File"><a href="/wiki/File:Computer_n_screen.svg" class="mw-file-description" title="Informatica"><img alt=" " src="//upload.wikimedia.org/wikipedia/commons/thumb/7/77/Computer_n_screen.svg/24px-Computer_n_screen.svg.png" decoding="async" width="24" height="25" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/77/Computer_n_screen.svg/37px-Computer_n_screen.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/77/Computer_n_screen.svg/48px-Computer_n_screen.svg.png 2x" data-file-width="119" data-file-height="123" /></a></span> <b><a href="/wiki/Portale:Informatica" title="Portale:Informatica">Portale Informatica</a></b>: accedi alle voci di Wikipedia che trattano di informatica</div></div></div>    </div><noscript><img src="https://auth.wikimedia.org/loginwiki/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Estratto da "<a dir="ltr" href="https://it.wikipedia.org/w/index.php?title=Compressione_dell%27immagine&oldid=139907753">https://it.wikipedia.org/w/index.php?title=Compressione_dell%27immagine&oldid=139907753</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Categoria:Categorie" title="Categoria:Categorie">Categorie</a>: <ul><li><a href="/wiki/Categoria:Compressione_dei_dati" title="Categoria:Compressione dei dati">Compressione dei dati</a></li><li><a href="/wiki/Categoria:Elaborazione_digitale_delle_immagini" title="Categoria:Elaborazione digitale delle immagini">Elaborazione digitale delle immagini</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Categoria nascosta: <ul><li><a href="/wiki/Categoria:P3847_letta_da_Wikidata" title="Categoria:P3847 letta da Wikidata">P3847 letta da Wikidata</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> Questa pagina è stata modificata per l'ultima volta il 25 giu 2024 alle 08:32.</li> <li id="footer-info-copyright">Il testo è disponibile secondo la <a rel="nofollow" class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.it">licenza Creative Commons Attribuzione-Condividi allo stesso modo</a>; possono applicarsi condizioni ulteriori. Vedi le <a class="external text" href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Terms_of_Use/it">condizioni d'uso</a> per i dettagli.</li> </ul> <ul id="footer-places"> <li id="footer-places-privacy"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Privacy_policy/it">Informativa sulla privacy</a></li> <li id="footer-places-about"><a href="/wiki/Wikipedia:Sala_stampa/Wikipedia">Informazioni su Wikipedia</a></li> <li id="footer-places-disclaimers"><a href="/wiki/Wikipedia:Avvertenze_generali">Avvertenze</a></li> <li id="footer-places-wm-codeofconduct"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Universal_Code_of_Conduct">Codice di condotta</a></li> <li id="footer-places-developers"><a href="https://developer.wikimedia.org">Sviluppatori</a></li> <li id="footer-places-statslink"><a href="https://stats.wikimedia.org/#/it.wikipedia.org">Statistiche</a></li> <li id="footer-places-cookiestatement"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Cookie_statement">Dichiarazione sui cookie</a></li> <li id="footer-places-mobileview"><a href="//it.m.wikipedia.org/w/index.php?title=Compressione_dell%27immagine&mobileaction=toggle_view_mobile" class="noprint stopMobileRedirectToggle">Versione mobile</a></li> </ul> <ul id="footer-icons" class="noprint"> <li id="footer-copyrightico"><a href="https://www.wikimedia.org/" class="cdx-button cdx-button--fake-button cdx-button--size-large cdx-button--fake-button--enabled"><picture><source media="(min-width: 500px)" srcset="/static/images/footer/wikimedia-button.svg" width="84" height="29"><img src="/static/images/footer/wikimedia.svg" width="25" height="25" alt="Wikimedia Foundation" lang="en" loading="lazy"></picture></a></li> <li id="footer-poweredbyico"><a href="https://www.mediawiki.org/" class="cdx-button cdx-button--fake-button cdx-button--size-large cdx-button--fake-button--enabled"><picture><source media="(min-width: 500px)" srcset="/w/resources/assets/poweredby_mediawiki.svg" width="88" height="31"><img src="/w/resources/assets/mediawiki_compact.svg" alt="Powered by MediaWiki" lang="en" width="25" height="25" loading="lazy"></picture></a></li> </ul> </footer> </div> </div> </div> <div class="vector-header-container vector-sticky-header-container"> <div id="vector-sticky-header" class="vector-sticky-header"> <div class="vector-sticky-header-start"> <div class="vector-sticky-header-icon-start vector-button-flush-left vector-button-flush-right" aria-hidden="true"> <button class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-sticky-header-search-toggle" tabindex="-1" data-event-name="ui.vector-sticky-search-form.icon"><span class="vector-icon mw-ui-icon-search mw-ui-icon-wikimedia-search"></span> <span>Ricerca</span> </button> </div> <div role="search" class="vector-search-box-vue vector-search-box-show-thumbnail vector-search-box"> <div class="vector-typeahead-search-container"> <div class="cdx-typeahead-search cdx-typeahead-search--show-thumbnail"> <form action="/w/index.php" id="vector-sticky-search-form" class="cdx-search-input cdx-search-input--has-end-button"> <div class="cdx-search-input__input-wrapper" data-search-loc="header-moved"> <div class="cdx-text-input cdx-text-input--has-start-icon"> <input class="cdx-text-input__input" type="search" name="search" placeholder="Cerca in Wikipedia"> <span class="cdx-text-input__icon cdx-text-input__start-icon"></span> </div> <input type="hidden" name="title" value="Speciale:Ricerca"> </div> <button class="cdx-button cdx-search-input__end-button">Ricerca</button> </form> </div> </div> </div> <div class="vector-sticky-header-context-bar"> <nav aria-label="Indice" class="vector-toc-landmark"> <div id="vector-sticky-header-toc" class="vector-dropdown mw-portlet mw-portlet-sticky-header-toc vector-sticky-header-toc vector-button-flush-left" > <input type="checkbox" id="vector-sticky-header-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-sticky-header-toc" class="vector-dropdown-checkbox " aria-label="Mostra/Nascondi l'indice" > <label id="vector-sticky-header-toc-label" for="vector-sticky-header-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Mostra/Nascondi l'indice</span> </label> <div class="vector-dropdown-content"> <div id="vector-sticky-header-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div class="vector-sticky-header-context-bar-primary" aria-hidden="true" ><span class="mw-page-title-main">Compressione dell'immagine</span></div> </div> </div> <div class="vector-sticky-header-end" aria-hidden="true"> <div class="vector-sticky-header-icons"> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-talk-sticky-header" tabindex="-1" data-event-name="talk-sticky-header"><span class="vector-icon mw-ui-icon-speechBubbles mw-ui-icon-wikimedia-speechBubbles"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-subject-sticky-header" tabindex="-1" data-event-name="subject-sticky-header"><span class="vector-icon mw-ui-icon-article mw-ui-icon-wikimedia-article"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-history-sticky-header" tabindex="-1" data-event-name="history-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-history mw-ui-icon-wikimedia-wikimedia-history"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only mw-watchlink" id="ca-watchstar-sticky-header" tabindex="-1" data-event-name="watch-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-star mw-ui-icon-wikimedia-wikimedia-star"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-ve-edit-sticky-header" tabindex="-1" data-event-name="ve-edit-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-edit mw-ui-icon-wikimedia-wikimedia-edit"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-edit-sticky-header" tabindex="-1" data-event-name="wikitext-edit-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-wikiText mw-ui-icon-wikimedia-wikimedia-wikiText"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-viewsource-sticky-header" tabindex="-1" data-event-name="ve-edit-protected-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-editLock mw-ui-icon-wikimedia-wikimedia-editLock"></span> <span></span> </a> </div> <div class="vector-sticky-header-buttons"> <button class="cdx-button cdx-button--weight-quiet mw-interlanguage-selector" id="p-lang-btn-sticky-header" tabindex="-1" data-event-name="ui.dropdown-p-lang-btn-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-language mw-ui-icon-wikimedia-wikimedia-language"></span> <span>27 lingue</span> </button> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive" id="ca-addsection-sticky-header" tabindex="-1" data-event-name="addsection-sticky-header"><span class="vector-icon mw-ui-icon-speechBubbleAdd-progressive mw-ui-icon-wikimedia-speechBubbleAdd-progressive"></span> <span>Aggiungi argomento</span> </a> </div> <div class="vector-sticky-header-icon-end"> <div class="vector-user-links"> </div> </div> </div> </div> </div> <div class="mw-portlet mw-portlet-dock-bottom emptyPortlet" id="p-dock-bottom"> <ul> </ul> </div> <script>(RLQ=window.RLQ||[]).push(function(){mw.config.set({"wgHostname":"mw-web.codfw.main-779c5f569f-vjbg7","wgBackendResponseTime":140,"wgPageParseReport":{"limitreport":{"cputime":"0.234","walltime":"0.612","ppvisitednodes":{"value":1727,"limit":1000000},"postexpandincludesize":{"value":48591,"limit":2097152},"templateargumentsize":{"value":285,"limit":2097152},"expansiondepth":{"value":9,"limit":100},"expensivefunctioncount":{"value":1,"limit":500},"unstrip-depth":{"value":0,"limit":20},"unstrip-size":{"value":11838,"limit":5000000},"entityaccesscount":{"value":1,"limit":400},"timingprofile":["100.00% 274.209 1 -total"," 46.49% 127.481 1 Template:Collegamenti_esterni"," 19.49% 53.447 1 Template:Formati_di_compressione"," 18.44% 50.552 1 Template:Navbox"," 15.17% 41.585 7 Template:Cita_web"," 8.45% 23.172 1 Template:Interprogetto"," 7.76% 21.275 1 Template:Portale"," 5.89% 16.147 4 Template:Navbox_subgroup"," 3.78% 10.365 1 Template:Icona_argomento"," 1.47% 4.031 2 Template:En"]},"scribunto":{"limitreport-timeusage":{"value":"0.141","limit":"10.000"},"limitreport-memusage":{"value":5732739,"limit":52428800}},"cachereport":{"origin":"mw-web.eqiad.main-7fd96bd568-mptrn","timestamp":"20250316181030","ttl":2592000,"transientcontent":false}}});});</script> <script type="application/ld+json">{"@context":"https:\/\/schema.org","@type":"Article","name":"Compressione dell'immagine","url":"https:\/\/it.wikipedia.org\/wiki\/Compressione_dell%27immagine","sameAs":"http:\/\/www.wikidata.org\/entity\/Q412438","mainEntity":"http:\/\/www.wikidata.org\/entity\/Q412438","author":{"@type":"Organization","name":"Contributori ai progetti Wikimedia"},"publisher":{"@type":"Organization","name":"Wikimedia Foundation, Inc.","logo":{"@type":"ImageObject","url":"https:\/\/www.wikimedia.org\/static\/images\/wmf-hor-googpub.png"}},"datePublished":"2007-06-03T13:53:31Z","dateModified":"2024-06-25T07:32:40Z","image":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/c\/ce\/Quality_comparison_jpg_vs_saveforweb.jpg","headline":"riduzione delle dimensioni dell'immagine per farle occupare meno memoria"}</script> </body> </html>