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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 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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=JPEG" 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=JPEG" 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 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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-Storia" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Storia"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Storia</span> </div> </a> <ul id="toc-Storia-sublist" class="vector-toc-list"> </ul> </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">2</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-Caratteristiche_del_formato_jpeg" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Caratteristiche_del_formato_jpeg"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>Caratteristiche del formato jpeg</span> </div> </a> <ul id="toc-Caratteristiche_del_formato_jpeg-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Conversione_immagine_da_bitmap_a_JPEG" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Conversione_immagine_da_bitmap_a_JPEG"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2</span> <span>Conversione immagine da bitmap a JPEG</span> </div> </a> <ul id="toc-Conversione_immagine_da_bitmap_a_JPEG-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Utilizzo" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Utilizzo"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.3</span> <span>Utilizzo</span> </div> </a> <ul id="toc-Utilizzo-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Altri_formati_di_compressione_"lossy"" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Altri_formati_di_compressione_"lossy""> <div class="vector-toc-text"> <span class="vector-toc-numb">2.4</span> <span>Altri formati di compressione "lossy"</span> </div> </a> <ul id="toc-Altri_formati_di_compressione_"lossy"-sublist" class="vector-toc-list"> </ul> </li> </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">JPEG</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 66 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-66" 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">66 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%AC%D9%8A%D9%87_%D8%A8%D9%8A%D9%87_%D8%A5%D9%8A_%D8%AC%D9%8A" title="جيه بيه إي جي - arabo" lang="ar" hreflang="ar" data-title="جيه بيه إي جي" data-language-autonym="العربية" data-language-local-name="arabo" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/JPEG" title="JPEG - asturiano" lang="ast" hreflang="ast" data-title="JPEG" data-language-autonym="Asturianu" data-language-local-name="asturiano" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/JPEG" title="JPEG - azerbaigiano" lang="az" hreflang="az" data-title="JPEG" data-language-autonym="Azərbaycanca" data-language-local-name="azerbaigiano" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/JPEG" title="JPEG - bielorusso" lang="be" hreflang="be" data-title="JPEG" data-language-autonym="Беларуская" data-language-local-name="bielorusso" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/JPEG" title="JPEG - bulgaro" lang="bg" hreflang="bg" data-title="JPEG" data-language-autonym="Български" data-language-local-name="bulgaro" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%9C%E0%A7%87%E0%A6%AA%E0%A6%BF%E0%A6%87%E0%A6%9C%E0%A6%BF" title="জেপিইজি - bengalese" lang="bn" hreflang="bn" data-title="জেপিইজি" data-language-autonym="বাংলা" data-language-local-name="bengalese" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/JPEG" title="JPEG - bosniaco" lang="bs" hreflang="bs" data-title="JPEG" data-language-autonym="Bosanski" data-language-local-name="bosniaco" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/JPEG" title="JPEG - catalano" lang="ca" hreflang="ca" data-title="JPEG" data-language-autonym="Català" data-language-local-name="catalano" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/JPEG" title="JPEG - ceco" lang="cs" hreflang="cs" data-title="JPEG" data-language-autonym="Čeština" data-language-local-name="ceco" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/JPEG" title="JPEG - danese" lang="da" hreflang="da" data-title="JPEG" data-language-autonym="Dansk" data-language-local-name="danese" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/JPEG" title="JPEG - tedesco" lang="de" hreflang="de" data-title="JPEG" data-language-autonym="Deutsch" data-language-local-name="tedesco" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/JPEG" title="JPEG - greco" lang="el" hreflang="el" data-title="JPEG" data-language-autonym="Ελληνικά" data-language-local-name="greco" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/JPEG" title="JPEG - inglese" lang="en" hreflang="en" data-title="JPEG" data-language-autonym="English" data-language-local-name="inglese" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/JPEG" title="JPEG - esperanto" lang="eo" hreflang="eo" data-title="JPEG" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Joint_Photographic_Experts_Group" title="Joint Photographic Experts Group - spagnolo" lang="es" hreflang="es" data-title="Joint Photographic Experts Group" data-language-autonym="Español" data-language-local-name="spagnolo" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/JPEG" title="JPEG - estone" lang="et" hreflang="et" data-title="JPEG" data-language-autonym="Eesti" data-language-local-name="estone" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/JPEG" title="JPEG - basco" lang="eu" hreflang="eu" data-title="JPEG" 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/JPEG" title="JPEG - persiano" lang="fa" hreflang="fa" data-title="JPEG" 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/JPEG" title="JPEG - finlandese" lang="fi" hreflang="fi" data-title="JPEG" 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/JPEG" title="JPEG - francese" lang="fr" hreflang="fr" data-title="JPEG" data-language-autonym="Français" data-language-local-name="francese" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/JPEG" title="JPEG - galiziano" lang="gl" hreflang="gl" data-title="JPEG" data-language-autonym="Galego" data-language-local-name="galiziano" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/JPEG" title="JPEG - ebraico" lang="he" hreflang="he" data-title="JPEG" data-language-autonym="עברית" data-language-local-name="ebraico" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%9C%E0%A5%87%E0%A4%AA%E0%A5%80%E0%A4%88%E0%A4%9C%E0%A5%80" title="जेपीईजी - hindi" lang="hi" hreflang="hi" data-title="जेपीईजी" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/JPEG" title="JPEG - croato" lang="hr" hreflang="hr" data-title="JPEG" data-language-autonym="Hrvatski" data-language-local-name="croato" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/JPEG" title="JPEG - ungherese" lang="hu" hreflang="hu" data-title="JPEG" data-language-autonym="Magyar" data-language-local-name="ungherese" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/JPEG" title="JPEG - armeno" lang="hy" hreflang="hy" data-title="JPEG" data-language-autonym="Հայերեն" data-language-local-name="armeno" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Gugus_Pakar_Fotografi_Gabungan" title="Gugus Pakar Fotografi Gabungan - indonesiano" lang="id" hreflang="id" data-title="Gugus Pakar Fotografi Gabungan" 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/JPEG" title="JPEG - islandese" lang="is" hreflang="is" data-title="JPEG" 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/JPEG" title="JPEG - giapponese" lang="ja" hreflang="ja" data-title="JPEG" 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-jv mw-list-item"><a href="https://jv.wikipedia.org/wiki/JPEG" title="JPEG - giavanese" lang="jv" hreflang="jv" data-title="JPEG" data-language-autonym="Jawa" data-language-local-name="giavanese" class="interlanguage-link-target"><span>Jawa</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/JPEG" title="JPEG - georgiano" lang="ka" hreflang="ka" data-title="JPEG" data-language-autonym="ქართული" data-language-local-name="georgiano" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-km mw-list-item"><a href="https://km.wikipedia.org/wiki/JPEG" title="JPEG - khmer" lang="km" hreflang="km" data-title="JPEG" data-language-autonym="ភាសាខ្មែរ" data-language-local-name="khmer" class="interlanguage-link-target"><span>ភាសាខ្មែរ</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/JPEG" title="JPEG - coreano" lang="ko" hreflang="ko" data-title="JPEG" data-language-autonym="한국어" data-language-local-name="coreano" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/Jpeg" title="Jpeg - kirghiso" lang="ky" hreflang="ky" data-title="Jpeg" data-language-autonym="Кыргызча" data-language-local-name="kirghiso" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-lb mw-list-item"><a href="https://lb.wikipedia.org/wiki/.jpg" title=".jpg - lussemburghese" lang="lb" hreflang="lb" data-title=".jpg" data-language-autonym="Lëtzebuergesch" data-language-local-name="lussemburghese" class="interlanguage-link-target"><span>Lëtzebuergesch</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/JPEG" title="JPEG - lituano" lang="lt" hreflang="lt" data-title="JPEG" data-language-autonym="Lietuvių" data-language-local-name="lituano" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/JPEG" title="JPEG - lettone" lang="lv" hreflang="lv" data-title="JPEG" data-language-autonym="Latviešu" data-language-local-name="lettone" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/JPEG" title="JPEG - macedone" lang="mk" hreflang="mk" data-title="JPEG" data-language-autonym="Македонски" data-language-local-name="macedone" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%9C%E0%B5%86.%E0%B4%AA%E0%B4%BF.%E0%B4%87.%E0%B4%9C%E0%B4%BF." title="ജെ.പി.ഇ.ജി. - malayalam" lang="ml" hreflang="ml" data-title="ജെ.പി.ഇ.ജി." data-language-autonym="മലയാളം" data-language-local-name="malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/JPEG" title="JPEG - malese" lang="ms" hreflang="ms" data-title="JPEG" 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/JPEG" title="JPEG - olandese" lang="nl" hreflang="nl" data-title="JPEG" data-language-autonym="Nederlands" data-language-local-name="olandese" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/JPEG" title="JPEG - norvegese nynorsk" lang="nn" hreflang="nn" data-title="JPEG" data-language-autonym="Norsk nynorsk" data-language-local-name="norvegese nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/JPEG" title="JPEG - norvegese bokmål" lang="nb" hreflang="nb" data-title="JPEG" data-language-autonym="Norsk bokmål" data-language-local-name="norvegese bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pam mw-list-item"><a href="https://pam.wikipedia.org/wiki/JPEG" title="JPEG - pampanga" lang="pam" hreflang="pam" data-title="JPEG" data-language-autonym="Kapampangan" data-language-local-name="pampanga" class="interlanguage-link-target"><span>Kapampangan</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/JPEG" title="JPEG - polacco" lang="pl" hreflang="pl" data-title="JPEG" data-language-autonym="Polski" data-language-local-name="polacco" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/JPEG" title="JPEG - portoghese" lang="pt" hreflang="pt" data-title="JPEG" 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/JPEG" title="JPEG - rumeno" lang="ro" hreflang="ro" data-title="JPEG" 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/JPEG" title="JPEG - russo" lang="ru" hreflang="ru" data-title="JPEG" data-language-autonym="Русский" data-language-local-name="russo" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/JPEG" title="JPEG - serbo-croato" lang="sh" hreflang="sh" data-title="JPEG" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbo-croato" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/JPEG" title="JPEG - Simple English" lang="en-simple" hreflang="en-simple" data-title="JPEG" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/JPEG" title="JPEG - slovacco" lang="sk" hreflang="sk" data-title="JPEG" data-language-autonym="Slovenčina" data-language-local-name="slovacco" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/JPEG" title="JPEG - sloveno" lang="sl" hreflang="sl" data-title="JPEG" data-language-autonym="Slovenščina" data-language-local-name="sloveno" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/JPEG" title="JPEG - albanese" lang="sq" hreflang="sq" data-title="JPEG" data-language-autonym="Shqip" data-language-local-name="albanese" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/JPEG" title="JPEG - serbo" lang="sr" hreflang="sr" data-title="JPEG" data-language-autonym="Српски / srpski" data-language-local-name="serbo" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/JPEG" title="JPEG - svedese" lang="sv" hreflang="sv" data-title="JPEG" data-language-autonym="Svenska" data-language-local-name="svedese" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B9%80%E0%B8%88%E0%B9%80%E0%B8%9E%E0%B9%87%E0%B8%81" title="เจเพ็ก - thailandese" lang="th" hreflang="th" data-title="เจเพ็ก" data-language-autonym="ไทย" data-language-local-name="thailandese" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/JPEG" title="JPEG - turco" lang="tr" hreflang="tr" data-title="JPEG" data-language-autonym="Türkçe" data-language-local-name="turco" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/JPEG" title="JPEG - ucraino" lang="uk" hreflang="uk" data-title="JPEG" data-language-autonym="Українська" data-language-local-name="ucraino" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D8%AC%DB%92_%D9%BE%DB%8C_%D8%A7%DB%8C_%D8%AC%DB%8C" title="جے پی ای جی - urdu" lang="ur" hreflang="ur" data-title="جے پی ای جی" data-language-autonym="اردو" data-language-local-name="urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/JPEG" title="JPEG - uzbeco" lang="uz" hreflang="uz" data-title="JPEG" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="uzbeco" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vec mw-list-item"><a href="https://vec.wikipedia.org/wiki/JPEG" title="JPEG - veneto" lang="vec" hreflang="vec" data-title="JPEG" data-language-autonym="Vèneto" data-language-local-name="veneto" class="interlanguage-link-target"><span>Vèneto</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/JPEG" title="JPEG - vietnamita" lang="vi" hreflang="vi" data-title="JPEG" 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-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/JPEG" title="JPEG - wu" lang="wuu" hreflang="wuu" data-title="JPEG" data-language-autonym="吴语" data-language-local-name="wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-yo mw-list-item"><a href="https://yo.wikipedia.org/wiki/JPEG" title="JPEG - yoruba" lang="yo" hreflang="yo" data-title="JPEG" data-language-autonym="Yorùbá" data-language-local-name="yoruba" class="interlanguage-link-target"><span>Yorùbá</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/JPEG" title="JPEG - cinese" lang="zh" hreflang="zh" data-title="JPEG" data-language-autonym="中文" data-language-local-name="cinese" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/JPEG" title="JPEG - cantonese" lang="yue" hreflang="yue" data-title="JPEG" data-language-autonym="粵語" data-language-local-name="cantonese" class="interlanguage-link-target"><span>粵語</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/Q2195#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/JPEG" title="Vedi la voce [c]" accesskey="c"><span>Voce</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Discussione:JPEG" rel="discussion" title="Vedi le discussioni relative a questa pagina [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/JPEG"><span>Leggi</span></a></li><li id="ca-ve-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=JPEG&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=JPEG&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=JPEG&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/JPEG"><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=JPEG&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=JPEG&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=JPEG&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/JPEG" 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/JPEG" 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=JPEG&oldid=143114528" 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=JPEG&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=JPEG&id=143114528&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%2FJPEG"><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%2FJPEG"><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=JPEG"><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=JPEG&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=JPEG&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:JPEG_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/Q2195" 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"><style data-mw-deduplicate="TemplateStyles:r143074810">.mw-parser-output .sinottico{background-color:#f8f9fa;border:1px solid #c8ccd1;border-spacing:0;clear:right;float:right;font-size:95%;line-height:1.4em;margin:0 0 1em 1.5em;width:280px}.mw-parser-output .sinottico caption{font-weight:bold}.mw-parser-output .sinottico>tbody>tr>th:not(:only-child),.mw-parser-output .sinottico_annidata>tbody>tr>th:not(:only-child){background-color:#f3f3f3;border-right:1px solid #e5e5e8;text-align:left;vertical-align:top}.mw-parser-output .sinottico>tbody>tr:not(:last-child)>td,.mw-parser-output .sinottico>tbody>tr:not(:last-child)>th,.mw-parser-output .sinottico_annidata>tbody>tr>td,.mw-parser-output .sinottico_annidata>tbody>tr>th{border-bottom:1px solid #e0e0e0}.mw-parser-output .sinottico>tbody>tr>td,.mw-parser-output .sinottico>tbody>tr>th:not(:only-child),.mw-parser-output .sinottico_annidata>tbody>tr>td,.mw-parser-output .sinottico_annidata>tbody>tr>th:not(:only-child){padding:.25em .4em}.mw-parser-output .sinottico>tbody>tr>td,.mw-parser-output .sinottico_annidata>tbody>tr>td{vertical-align:middle}.mw-parser-output .sinottico>tbody>tr>td>hr:only-child{margin:0.4em 0.2em}.mw-parser-output .sinottico ul{margin:0 0 0 1em;padding:0}.mw-parser-output .sinottico_annidata{border-spacing:0;margin:0 -.4em;width:calc(100% + calc(.4em*2))}.mw-parser-output .sinottico_annidata:last-child{margin-bottom:-.2em}.mw-parser-output .sinottico_annidata:last-child>tbody>tr:last-child>td,.mw-parser-output .sinottico_annidata:last-child>tbody>tr:last-child>th{border-bottom:none}.mw-parser-output .sinottico_divisione+.sinottico_divisione>th,.mw-parser-output .sinottico_testata+.sinottico_divisione>th{border-top:2px solid #f8f9fa}.mw-parser-output .sinottico_divisione th{background-color:#eeeeee;padding:.15em .4em;text-align:center}.mw-parser-output .sinottico_piede{text-align:center;font-size:90%;background:#EFEFEF}.mw-parser-output .sinottico_piede2{background-color:white;font-size:xx-small;padding-bottom:0;text-align:right}.mw-parser-output .sinottico_sottotitolo{font-size:80%}.mw-parser-output .sinottico_testata th{background-color:#dedede;font-size:116%;padding:.2em .4em;text-align:center}.mw-parser-output .sinottico_testo_centrale{text-align:center}</style><table class="infobox sinottico" summary="Tabella sinottica che riassume i principali dati del soggetto"><tbody><tr class="sinottico_testata"><th colspan="2" style="background:lightblue">Joint Photographic Experts Group (JPEG)</th></tr><tr><td class="sinottico_testo_centrale" colspan="2"><figure class="mw-halign-center" typeof="mw:File/Frameless"><a href="/wiki/File:Joint_Photographic_Experts_Group_logo.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/24/Joint_Photographic_Experts_Group_logo.svg/100px-Joint_Photographic_Experts_Group_logo.svg.png" decoding="async" width="100" height="104" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/24/Joint_Photographic_Experts_Group_logo.svg/150px-Joint_Photographic_Experts_Group_logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/24/Joint_Photographic_Experts_Group_logo.svg/200px-Joint_Photographic_Experts_Group_logo.svg.png 2x" data-file-width="314" data-file-height="325" /></a><figcaption></figcaption></figure> </td></tr><tr><td class="sinottico_testo_centrale" colspan="2"><figure class="mw-halign-center" typeof="mw:File/Frameless"><a href="/wiki/File:Felis_silvestris_silvestris_small_gradual_decrease_of_quality.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e9/Felis_silvestris_silvestris_small_gradual_decrease_of_quality.png/259px-Felis_silvestris_silvestris_small_gradual_decrease_of_quality.png" decoding="async" width="259" height="300" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e9/Felis_silvestris_silvestris_small_gradual_decrease_of_quality.png/389px-Felis_silvestris_silvestris_small_gradual_decrease_of_quality.png 1.5x, //upload.wikimedia.org/wikipedia/commons/e/e9/Felis_silvestris_silvestris_small_gradual_decrease_of_quality.png 2x" data-file-width="519" data-file-height="600" /></a><figcaption></figcaption></figure>Una foto di un gatto selvatico europeo con il tasso di compressione in diminuzione e quindi la qualità in aumento, da sinistra a destra </td></tr><tr><th><a href="/wiki/Estensione_(file)" class="mw-redirect" title="Estensione (file)">Estensione</a></th><td><code>.jpg / .jpeg / .jpe /.jif / .jfif / .jfi</code> </td></tr><tr><th><a href="/wiki/Magic_number" title="Magic number">Magic number</a></th><td><code>ff d8 ff</code> </td></tr><tr><th><a href="/wiki/Tipo_MIME" class="mw-redirect" title="Tipo MIME">Tipo MIME</a></th><td><code>image/jpeg</code> </td></tr><tr><th><a href="/wiki/Uniform_Type_Identifier" title="Uniform Type Identifier">Uniform Type Identifier (UTI)</a></th><td><code>public.jpeg</code> </td></tr><tr><th><a href="/w/index.php?title=Type_code&action=edit&redlink=1" class="new" title="Type code (la pagina non esiste)">Type code</a> (<a href="/wiki/Mac_OS" class="mw-redirect" title="Mac OS">Mac OS</a>)</th><td><code>JPEG</code> </td></tr><tr><th>Sviluppatore</th><td>Joint Photographic Experts Group, IBM, Mitsubishi Electric, AT&T, Canon Inc. </td></tr><tr><th><a href="/wiki/Licenza_(informatica)" title="Licenza (informatica)">Licenza</a></th><td>Royalty free </td></tr><tr><th>1ª pubblicazione</th><td>18 settembre 1992 </td></tr><tr><th>Tipo</th><td><a href="/wiki/Compressione_dell%27immagine" title="Compressione dell'immagine">Compressione dell'immagine</a> </td></tr><tr><th><a href="/wiki/Compressione_dei_dati" title="Compressione dei dati">Compressione</a></th><td><a href="/wiki/Compressione_dati_lossy" title="Compressione dati lossy">lossy</a> (solitamente) e <a href="/wiki/Lossless" class="mw-redirect" title="Lossless">lossless</a> </td></tr><tr><th>Esteso a</th><td><a href="/wiki/JPEG_2000" title="JPEG 2000">JPEG 2000</a> </td></tr><tr><th>Standard</th><td>ISO/IEC 10918, ITU-T T.81, ITU-T T.83, ITU-T T.84, ITU-T T.86 </td></tr><tr><th><a href="/wiki/Sito_web" title="Sito web">Sito web</a></th><td><a rel="nofollow" class="external text" href="http://www.jpeg.org">www.jpeg.org</a> </td></tr><tr><td class="sinottico_piede2 noprint nomobile metadata" colspan="2"><a href="https://www.wikidata.org/wiki/Q2195" class="extiw" title="d:Q2195"><span title="Modifica i dati della voce JPEG su Wikidata">Modifica dati su Wikidata</span></a><b> ·</b> <a href="/wiki/Template:Formato_file/man" title="Template:Formato file/man"><span title="Manuale del template Formato file">Manuale</span></a></td></tr></tbody></table> <p><b>JPEG</b> è l'acronimo di <b>J</b>oint <b>P</b>hotographic <b>E</b>xperts <b>G</b>roup, un comitato di esperti <a href="/wiki/ISO" class="mw-redirect" title="ISO">ISO</a>/<a href="/wiki/CCITT" class="mw-redirect" title="CCITT">CCITT</a> che ha definito il primo <a href="/wiki/Standard_(informatica)" class="mw-redirect" title="Standard (informatica)">standard</a> internazionale di <a href="/wiki/Compressione_dell%27immagine" title="Compressione dell'immagine">compressione</a> dell'<a href="/wiki/Immagine_digitale" title="Immagine digitale">immagine digitale</a> a tono continuo, sia a <a href="/wiki/Livelli_di_grigio" title="Livelli di grigio">livelli di grigio</a> sia a <a href="/wiki/Colore" title="Colore">colori</a>. </p><p>La stessa combinazione di caratteri indica anche il diffusissimo algoritmo di <a href="/wiki/Compressione_dati_lossy" title="Compressione dati lossy">compressione a perdita di informazioni</a>, che è disponibile in <a href="/wiki/Formato_aperto" title="Formato aperto">formato aperto</a> e a implementazione libera. Si noti tuttavia che parlare di "<a href="/wiki/File" title="File">file</a> in formato jpg" è concettualmente errato, in quanto non esiste un "formato di file jpg": il file <i>contenitore</i> può essere di vario tipo (exif, jfif, tiff), ed è solo l'immagine <i>contenuta</i> ad essere effettivamente in formato jpg. Si tratta dello stesso ordine di concetti relativo ad esempio ai file video <a href="/wiki/Audio_Video_Interleave" title="Audio Video Interleave">avi</a> o <a href="/wiki/MKV_(formato_di_file)" class="mw-redirect" title="MKV (formato di file)">mkv</a>, che possono contenere file compressi con una moltitudine di algoritmi estremamente vari. </p><p>JPEG è divenuto il più diffuso standard di compressione delle immagini <a href="/wiki/Fotografia" title="Fotografia">fotografiche</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Storia">Storia</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=JPEG&veaction=edit&section=1" title="Modifica la sezione Storia" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=JPEG&action=edit&section=1" title="Edit section's source code: Storia"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>La specifica JPEG originale pubblicata nel 1992 implementa i processi di vari precedenti documenti di ricerca e brevetti citati dal <a href="/wiki/CCITT" class="mw-redirect" title="CCITT">CCITT</a> (ora ITU-T) e dal Joint <a href="/w/index.php?title=Photographic_Experts_Group&action=edit&redlink=1" class="new" title="Photographic Experts Group (la pagina non esiste)">Photographic Experts Group</a>.<sup id="cite_ref-:0_1-0" class="reference"><a href="#cite_note-:0-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> La base principale per l'algoritmo di compressione con perdita di dati di JPEG è la trasformata discreta di coseno (DCT), proposta per la prima volta da Nasir Ahmed come tecnica di compressione delle immagini nel 1972. Ahmed ha sviluppato un algoritmo DCT pratico con T. Natarajan della Kansas State University e KR Rao della University of <a href="/wiki/Texas" title="Texas">Texas</a> nel 1973.<sup id="cite_ref-:0_1-1" class="reference"><a href="#cite_note-:0-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> Il loro documento fondamentale del 1974 è citato nelle specifiche JPEG, insieme a diversi articoli di ricerca successivi che hanno ulteriormente lavorato su DCT, tra cui un articolo del 1977 di Wen-Hsiung Chen, CH Smith e SC Fralick che descriveva un veloce algoritmo DCT, nonché un articolo del 1978 di NJ Narasinha e SC Fralick, e un articolo del 1984 di BG Lee. La specifica cita anche un articolo del 1984 di Wen-Hsiung Chen e WK Pratt come influenza sul suo algoritmo di <a href="/wiki/Quantizzazione_(elettronica)" title="Quantizzazione (elettronica)">quantizzazione</a>, e l'articolo del 1952 di David A. Huffman per il suo algoritmo di codifica Huffman. </p><p>La specifica JPEG cita brevetti di diverse aziende. I seguenti brevetti hanno fornito le basi per il suo algoritmo di <a href="/wiki/Codifica_aritmetica" title="Codifica aritmetica">codifica aritmetica</a>. </p> <ul><li><a href="/wiki/IBM" title="IBM">IBM</a> <ul><li><a rel="nofollow" class="external text" href="https://www.google.com/patents/US4652856">Brevetto USA 4.652.856</a> - 4 febbraio 1986 - Kottappuram MA Mohiuddin e Jorma J. Rissanen - Codice aritmetico multi-alfabeto senza moltiplicazione</li> <li><a rel="nofollow" class="external text" href="https://www.google.com/patents/US4905297">Brevetto USA 4.905.297</a> - 27 febbraio 1990 - G. Langdon, JL Mitchell, WB Pennebaker e Jorma J. Rissanen - Sistema di codifica e decodifica aritmetica</li> <li><a rel="nofollow" class="external text" href="https://www.google.com/patents/US4935882">Brevetto USA 4.935.882</a> - 19 giugno 1990 - WB Pennebaker e JL Mitchell - Adattamento della probabilità per programmatori aritmetici</li></ul></li> <li><a href="/wiki/Mitsubishi_Electric" title="Mitsubishi Electric">Mitsubishi Electric</a> <ul><li><a rel="nofollow" class="external text" href="https://worldwide.espacenet.com/textdoc?DB=EPODOC&IDX=JPH02202267">JP H02202267</a> ( <a rel="nofollow" class="external text" href="https://patents.google.com/patent/JPH02202267A">1021672</a> ) - 21 gennaio 1989 - Toshihiro Kimura, Shigenori Kino, Fumitaka Ono, Masayuki Yoshida - Sistema di codifica</li> <li><a rel="nofollow" class="external text" href="https://worldwide.espacenet.com/textdoc?DB=EPODOC&IDX=JPH03247123">JP H03247123</a> ( <a rel="nofollow" class="external text" href="https://patents.google.com/patent/JPH0834434B2/en">2-46275</a> ) - 26 febbraio 1990 - Fumitaka Ono, Tomohiro Kimura, Masayuki Yoshida e Shigenori Kino - Apparecchi di codifica e metodo di codifica</li></ul></li></ul> <p>La specifica JPEG cita anche altri tre brevetti di IBM. Altre società citate come titolari di brevetti includono <a href="/wiki/AT%26T" title="AT&T">AT&T</a> (due brevetti) e Canon Inc. Assente dall'elenco è il brevetto USA 4.698.672, depositato da Wen-Hsiung Chen e Daniel J. Klenke di Compression Labs nell'ottobre 1986. Il brevetto descrive un Algoritmo di compressione delle immagini basato su DCT, che sarebbe poi causa di polemiche nel 2002 (vedi <i>polemiche sui brevetti di</i> seguito)<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>. Tuttavia, la specifica JPEG citava due precedenti lavori di ricerca di Wen-Hsiung Chen, pubblicati nel 1977 e nel 1984.<sup id="cite_ref-:0_1-2" class="reference"><a href="#cite_note-:0-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p> <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=JPEG&veaction=edit&section=2" 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=JPEG&action=edit&section=2" title="Edit section's source code: Descrizione"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Caratteristiche_del_formato_jpeg">Caratteristiche del formato jpeg</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=JPEG&veaction=edit&section=3" title="Modifica la sezione Caratteristiche del formato jpeg" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=JPEG&action=edit&section=3" title="Edit section's source code: Caratteristiche del formato jpeg"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>JPEG specifica solamente come una immagine possa essere trasformata in una sequenza di <a href="/wiki/Byte" title="Byte">byte</a>, ma non come questa possa essere incapsulata in un formato di file. I due aspetti sono spesso confusi ed il termine "jpeg" viene utilizzato come sinonimo di "file contenente un'immagine compressa con jpeg". </p><p>Lo standard JPEG definisce due metodi di compressione di base, uno basato sull'uso della <a href="/wiki/Trasformata_discreta_del_coseno" title="Trasformata discreta del coseno">trasformata discreta del coseno</a> (DCT-<i>Discrete Cosine Transformì</i>) con "<a href="/wiki/Compressione_dati_lossy" title="Compressione dati lossy">compressione di tipo lossy</a>" cioè con perdita di <a href="/wiki/Informazione" title="Informazione">informazione</a>, l'altro sull'uso di un metodo predittivo con compressione di tipo "<a href="/wiki/Compressione_dati_lossless" class="mw-redirect" title="Compressione dati lossless">lossless</a>" cioè senza perdita di informazione<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> <figure class="mw-default-size" typeof="mw:File/Thumb"><span><video id="mwe_player_0" poster="//upload.wikimedia.org/wikipedia/commons/thumb/f/f3/Continuously_varied_JPEG_compression_for_an_abdominal_CT_scan_-_1471-2342-12-24-S1.ogv/220px--Continuously_varied_JPEG_compression_for_an_abdominal_CT_scan_-_1471-2342-12-24-S1.ogv.jpg" controls="" preload="none" data-mw-tmh="" class="mw-file-element" width="220" height="124" data-durationhint="44" data-mwtitle="Continuously_varied_JPEG_compression_for_an_abdominal_CT_scan_-_1471-2342-12-24-S1.ogv" data-mwprovider="wikimediacommons" resource="/wiki/File:Continuously_varied_JPEG_compression_for_an_abdominal_CT_scan_-_1471-2342-12-24-S1.ogv"><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/f/f3/Continuously_varied_JPEG_compression_for_an_abdominal_CT_scan_-_1471-2342-12-24-S1.ogv/Continuously_varied_JPEG_compression_for_an_abdominal_CT_scan_-_1471-2342-12-24-S1.ogv.480p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="480p.vp9.webm" data-width="854" data-height="480" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/f/f3/Continuously_varied_JPEG_compression_for_an_abdominal_CT_scan_-_1471-2342-12-24-S1.ogv/Continuously_varied_JPEG_compression_for_an_abdominal_CT_scan_-_1471-2342-12-24-S1.ogv.720p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="720p.vp9.webm" data-width="1280" data-height="720" /><source src="//upload.wikimedia.org/wikipedia/commons/f/f3/Continuously_varied_JPEG_compression_for_an_abdominal_CT_scan_-_1471-2342-12-24-S1.ogv" type="video/ogg; codecs="theora, vorbis"" data-width="1280" data-height="720" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/f/f3/Continuously_varied_JPEG_compression_for_an_abdominal_CT_scan_-_1471-2342-12-24-S1.ogv/Continuously_varied_JPEG_compression_for_an_abdominal_CT_scan_-_1471-2342-12-24-S1.ogv.144p.mjpeg.mov" type="video/quicktime" data-transcodekey="144p.mjpeg.mov" data-width="256" data-height="144" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/f/f3/Continuously_varied_JPEG_compression_for_an_abdominal_CT_scan_-_1471-2342-12-24-S1.ogv/Continuously_varied_JPEG_compression_for_an_abdominal_CT_scan_-_1471-2342-12-24-S1.ogv.240p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="240p.vp9.webm" data-width="426" data-height="240" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/f/f3/Continuously_varied_JPEG_compression_for_an_abdominal_CT_scan_-_1471-2342-12-24-S1.ogv/Continuously_varied_JPEG_compression_for_an_abdominal_CT_scan_-_1471-2342-12-24-S1.ogv.360p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="360p.vp9.webm" data-width="640" data-height="360" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/f/f3/Continuously_varied_JPEG_compression_for_an_abdominal_CT_scan_-_1471-2342-12-24-S1.ogv/Continuously_varied_JPEG_compression_for_an_abdominal_CT_scan_-_1471-2342-12-24-S1.ogv.360p.webm" type="video/webm; codecs="vp8, vorbis"" data-transcodekey="360p.webm" data-width="640" data-height="360" /><track src="https://commons.wikimedia.org/w/api.php?action=timedtext&title=File%3AContinuously_varied_JPEG_compression_for_an_abdominal_CT_scan_-_1471-2342-12-24-S1.ogv&lang=en&trackformat=vtt&origin=%2A" kind="subtitles" type="text/vtt" srclang="en" label="English ‪(en)‬" data-dir="ltr" /></video></span><figcaption>Il video supplementare mostra l'effetto dell'aumento continuo della compressione JPEG da Q = 100 a Q = 1 e quindi della riduzione della compressione JPEG fino a Q = 100 per una TAC addominale. La gamma continua di valori Q mostrati nel video è simile a ciò che i soggetti hanno visto nell'esperimento psicometrico 1 (vedi Risultati), ma nell'esperimento reale, lo spettatore è stato in grado di controllare attivamente il processo di scorrimento attraverso la pila di immagini. Cioè una Compressione JPEG variata in modo continuo (tra Q = 100 e Q = 1) per una <a href="/wiki/Tomografia_computerizzata" title="Tomografia computerizzata">TAC addominale</a></figcaption></figure> <p>L'<a href="/wiki/Algoritmo" title="Algoritmo">algoritmo</a> base del JPEG di tipo "lossy" viene detto "baseline"; inoltre sono state definite delle estensioni opzionali del metodo "lossy" per la compressione di tipo gerarchico e progressivo. </p><p>Le estensioni di file più comuni per i file che utilizzano la compressione JPEG sono <b><code>.jpg</code></b>e <b><code>.jpeg</code></b>, tuttavia sono utilizzate anche <code>.jpe</code>, <code>.jfif</code>e <code>.jif</code>. È anche possibile che i dati JPEG vengano incorporati in altri tipi di file: i file codificati TIFF spesso incorporano un'immagine JPEG come anteprima dell'immagine principale o contengono direttamente immagini compresse con JPEG; i file MP3 possono contenere nel tag ID3v2 un'immagine compressa tramite JPEG, copertina del brano / album. </p> <div class="mw-heading mw-heading3"><h3 id="Conversione_immagine_da_bitmap_a_JPEG">Conversione immagine da bitmap a JPEG</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=JPEG&veaction=edit&section=4" title="Modifica la sezione Conversione immagine da bitmap a JPEG" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=JPEG&action=edit&section=4" title="Edit section's source code: Conversione immagine da bitmap a JPEG"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Essenzialmente il JPEG opera in 4 passi fondamentali per trasformare un'<a href="/wiki/Grafica_raster" title="Grafica raster">immagine bitmap</a> in una JPEG e viceversa. </p><p>Tali passi sono: </p><p>L'immagine, vista come matrice di dimensioni NxN generiche, viene suddivisa in blocchetti di 8x8 pixel (se i blocchi di dati fossero di dimensioni più grandi, l'elaborazione risulterebbe troppo pesante e lenta; se più piccoli, non conterrebbero sufficiente informazione). Per ogni blocchetto si hanno le seguenti elaborazioni in sequenza: </p> <ul><li>Rappresentazione in <a href="/wiki/Dominio_della_frequenza" title="Dominio della frequenza">ambito frequenziale</a> tramite DCT (<a href="/wiki/Trasformata_discreta_del_coseno" title="Trasformata discreta del coseno">trasformata discreta del coseno</a>) se opera in <a href="/wiki/Compressione_dati_lossy" title="Compressione dati lossy">modalità lossy</a>, uso dei predittori in <a href="/wiki/Compressione_dati_lossless" class="mw-redirect" title="Compressione dati lossless">modalità lossless</a>.</li> <li><a href="/wiki/Quantizzazione_(elettronica)" title="Quantizzazione (elettronica)">Quantizzazione</a> effettuata tramite opportune matrici, che, di solito, danno maggior peso ai coefficienti di ordine più basso (che rappresentano le basse frequenze spaziali), in quanto, per le proprietà della DCT, sono più importanti ai fini della sintesi dell'immagine, in quanto il sistema visivo umano percepisce meglio le basse frequenze spaziali rispetto alle alte frequenze.</li> <li><a href="/wiki/Codificazione_entropica" title="Codificazione entropica">Codifica entropica</a> ed eliminazione delle ridondanze di tipo statistico tramite <a href="/wiki/Run-length_encoding" title="Run-length encoding">codifica RLE</a> e <a href="/wiki/Codifica_di_Huffman" title="Codifica di Huffman">codici di Huffman</a>; la componente continua della DCT, invece, è codificata in <a href="/wiki/Pulse-Code_Modulation#Digitalizzazione" class="mw-redirect" title="Pulse-Code Modulation">DPCM</a> (<i><a href="/w/index.php?title=Differential_pulse-code_modulation&action=edit&redlink=1" class="new" title="Differential pulse-code modulation (la pagina non esiste)">Differential pulse-code modulation</a></i>).</li></ul> <p>Il <i>fattore di compressione</i> che si può raggiungere è determinato essenzialmente da un parametro di scalature per le matrici di quantizzazione. Tanto più piccolo è questo parametro, tanto peggiore è la qualità. Si può ottenere un fattore di compressione 15:1 senza alterare visibilmente la qualità dell'immagine. </p><p>Esempio di immagine compressa con l'algoritmo standard a diverse qualità: </p> <table> <tbody><tr> <td><figure class="mw-halign-none" typeof="mw:File/Frame"><a href="/wiki/File:TulipanoJPEG10.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/3/3c/TulipanoJPEG10.jpg" decoding="async" width="274" height="200" class="mw-file-element" data-file-width="274" data-file-height="200" /></a><figcaption>JPEG qualità 10% - 3,2 KB</figcaption></figure> </td> <td><figure class="mw-halign-none" typeof="mw:File/Frame"><a href="/wiki/File:TulipanoJPEG50.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/2/26/TulipanoJPEG50.jpg" decoding="async" width="274" height="200" class="mw-file-element" data-file-width="274" data-file-height="200" /></a><figcaption>JPEG qualità 50% - 6,7 KB</figcaption></figure> </td></tr> <tr> <td><figure class="mw-halign-none" typeof="mw:File/Frame"><a href="/wiki/File:TulipanoJPEG90.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/7/79/TulipanoJPEG90.jpg" decoding="async" width="274" height="200" class="mw-file-element" data-file-width="274" data-file-height="200" /></a><figcaption>JPEG qualità 90% - 30,2 KB</figcaption></figure> </td> <td><figure class="mw-halign-none" typeof="mw:File/Frame"><a href="/wiki/File:TulipanoJPEG100.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/b/bd/TulipanoJPEG100.jpg" decoding="async" width="274" height="200" class="mw-file-element" data-file-width="274" data-file-height="200" /></a><figcaption>JPEG qualità 100% - 87,7 KB</figcaption></figure> </td></tr></tbody></table> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Phalaenopsis_JPEG.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Phalaenopsis_JPEG.png/220px-Phalaenopsis_JPEG.png" decoding="async" width="220" height="196" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/3/3e/Phalaenopsis_JPEG.png 1.5x" data-file-width="240" data-file-height="214" /></a><figcaption>Immagine compressa in jpeg, in cui è possibile vedere la graduale variazione di qualità grafica con l'aumento della compressione (da sinistra a destra)</figcaption></figure> <p>Come si può notare, il miglior rapporto qualità/dimensione si ha con valore intorno al 90%. È inoltre immediatamente osservabile come, all'aumentare del livello di compressione, compaiano <a href="/wiki/Artefatto_di_compressione" title="Artefatto di compressione">artefatti</a> sempre più evidenti dal punto di vista visivo. Tra questi, il più tipico per il formato JPEG (come per tutti i formati che si basano sulla DCT) è la quadrettatura, o "blocking"; oltre ad esso si verificano fenomeni di "ringing" (<a href="/wiki/Fenomeno_di_Gibbs" title="Fenomeno di Gibbs">fenomeno di Gibbs</a>) e "blurring", o "blur" (sfocatura). </p> <div class="mw-heading mw-heading3"><h3 id="Utilizzo">Utilizzo</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=JPEG&veaction=edit&section=5" title="Modifica la sezione Utilizzo" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=JPEG&action=edit&section=5" title="Edit section's source code: Utilizzo"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>JPEG è l'algoritmo più diffuso per la memorizzazione di fotografie. È inoltre molto comune su <a href="/wiki/World_Wide_Web" title="World Wide Web">World Wide Web</a>. </p><p>Non è invece adatto per disegni geometrici, immagini al tratto e a colori uniformi, testo o icone, impieghi per i quali sono di impiego più comune i formati <a href="/wiki/Portable_Network_Graphics" title="Portable Network Graphics">Portable Network Graphics</a> (PNG) e <a href="/wiki/Graphics_Interchange_Format" title="Graphics Interchange Format">Graphics Interchange Format</a> (GIF). </p><p>Non possiede la possibilità di generare immagini animate </p> <div class="mw-heading mw-heading3"><h3 id="Altri_formati_di_compressione_"lossy""><span id="Altri_formati_di_compressione_.22lossy.22"></span>Altri formati di compressione "lossy"</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=JPEG&veaction=edit&section=6" title="Modifica la sezione Altri formati di compressione "lossy"" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=JPEG&action=edit&section=6" title="Edit section's source code: Altri formati di compressione "lossy""><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Nuovi metodi lossy, in particolare quelli basati sulle DWT (Discrete <a href="/wiki/Wavelet" title="Wavelet">Wavelet</a> Transform), garantiscono migliori risultati in alcuni casi. </p><p>Il comitato JPEG ha creato un nuovo standard basato su wavelet, <a href="/wiki/JPEG_2000" title="JPEG 2000">JPEG 2000</a>, con la prospettiva di sostituire nel tempo lo standard JPEG. </p> <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=JPEG&veaction=edit&section=7" 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=JPEG&action=edit&section=7" 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-:0-1"><span class="mw-cite-backlink"><b>^</b> <sup><i><a href="#cite_ref-:0_1-0">a</a></i></sup> <sup><i><a href="#cite_ref-:0_1-1">b</a></i></sup> <sup><i><a href="#cite_ref-:0_1-2">c</a></i></sup></span> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="https://www.scribd.com/doc/52879771/DCT-History-How-I-Came-Up-with-the-Discrete-Cosine-Transform"><span style="font-style:italic;">DCT-History_How I Came Up with the Discrete Cosine Transform | Data Compression | Applied Mathematics | Prova gratuita di 30 giorni</span></a>, su <span style="font-style:italic;">Scribd</span>. <small>URL consultato il 18 maggio 2020</small>.</cite></span> </li> <li id="cite_note-2"><a href="#cite_ref-2"><b>^</b></a> <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>) Robert Lemos, <a rel="nofollow" class="external text" href="https://www.cnet.com/news/finding-patent-truth-in-jpeg-claim/"><span style="font-style:italic;">Finding patent truth in JPEG claim</span></a>, su <span style="font-style:italic;">CNET</span>. <small>URL consultato il 18 maggio 2020</small>.</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="https://web.archive.org/web/20170304115413/https://www2.units.it/ipl/students_area/imm2/slide2011/lossless.pdf"><span style="font-style:italic;">Lucide del corso di Elaborazione Elettronica di Immagini II presso l'università di Trieste</span></a> (<span style="font-weight: bolder; font-size:80%"><abbr title="documento in formato PDF">PDF</abbr></span>), su <span style="font-style:italic;">www2.units.it</span>. <small>URL consultato il 3 marzo 2017</small> <small>(archiviato dall'<abbr title="https://www2.units.it/ipl/students_area/imm2/slide2011/lossless.pdf">url originale</abbr> il 4 marzo 2017)</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=JPEG&veaction=edit&section=8" 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=JPEG&action=edit&section=8" 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/Immagine_digitale" title="Immagine digitale">Immagine digitale</a></li> <li><a href="/wiki/Formato_di_file" class="mw-redirect" title="Formato di file">Formato di file</a></li> <li><a href="/wiki/Grafica_raster" title="Grafica raster">Grafica raster</a></li> <li><a href="/wiki/Elaborazione_digitale_delle_immagini" title="Elaborazione digitale delle immagini">Elaborazione digitale delle immagini</a></li> <li><a href="/wiki/Trasformata_discreta_del_coseno" title="Trasformata discreta del coseno">Trasformata discreta del coseno</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=JPEG&veaction=edit&section=9" 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=JPEG&action=edit&section=9" 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=""><a href="https://it.wiktionary.org/wiki/JPEG" class="extiw" title="wikt:JPEG">Wikizionario</a></li> <li class="" title=""><span class="plainlinks" title="commons:Category:JPEG compression"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:JPEG_compression?uselang=it">Wikimedia Commons</a></span></li></ul></div> <ul><li><span typeof="mw:File"><a href="https://it.wiktionary.org/wiki/" title="Collabora a Wikizionario"><img alt="Collabora a Wikizionario" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Wiktionary_small.svg/20px-Wiktionary_small.svg.png" decoding="async" width="18" height="18" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Wiktionary_small.svg/40px-Wiktionary_small.svg.png 1.5x" data-file-width="350" data-file-height="350" /></a></span> <a href="https://it.wiktionary.org/wiki/" class="extiw" title="wikt:">Wikizionario</a> contiene il lemma di dizionario «<b><a href="https://it.wiktionary.org/wiki/JPEG" class="extiw" title="wikt:JPEG">JPEG</a></b>»</li> <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/20px-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/40px-Commons-logo.svg.png 1.5x" 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 sul <b><span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:JPEG_compression?uselang=it">JPEG</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=JPEG&veaction=edit&section=10" 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=JPEG&action=edit&section=10" 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 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://jpeg.org/jpeg/"><span style="font-style:italic;">Sito ufficiale</span></a>, su <span style="font-style:italic;">jpeg.org</span>.</cite> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q2195#P856" 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 id="CITEREFTreccani.it" class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="https://www.treccani.it/enciclopedia/jpeg"><span style="font-style:italic;">JPEG</span></a>, su <span style="font-style:italic;">Treccani.it – Enciclopedie on line</span>, <a href="/wiki/Istituto_dell%27Enciclopedia_Italiana" title="Istituto dell'Enciclopedia Italiana">Istituto dell'Enciclopedia Italiana</a>.</cite> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q2195#P3365" 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 id="CITEREFLessico_del_XXI_secolo" class="citation libro" style="font-style:normal"> <a rel="nofollow" class="external text" href="https://www.treccani.it/enciclopedia/jpeg_(Lessico-del-XXI-Secolo)/"><span style="font-style:italic;">JPEG</span></a>, in <span style="font-style:italic;">Lessico del XXI secolo</span>, <a href="/wiki/Istituto_dell%27Enciclopedia_Italiana" title="Istituto dell'Enciclopedia Italiana">Istituto dell'Enciclopedia Italiana</a>, 2012-2013.</cite> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q2195#P9775" 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 id="CITEREFBritannica.com" 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.britannica.com/technology/JPEG"><span style="font-style:italic;">JPEG</span></a>, su <span style="font-style:italic;"><a href="/wiki/Enciclopedia_Britannica" title="Enciclopedia Britannica">Enciclopedia Britannica</a></span>, Encyclopædia Britannica, Inc.</cite> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q2195#P1417" 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 id="CITEREFFOLDOC" class="citation testo" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) Denis Howe, <span style="font-style:italic;"><a href="https://foldoc.org/JPEG" class="extiw" title="foldoc:JPEG">JPEG</a></span>, in <span style="font-style:italic;"><a href="/wiki/Free_On-line_Dictionary_of_Computing" title="Free On-line Dictionary of Computing">Free On-line Dictionary of Computing</a></span>.</cite> Disponibile con licenza <a href="/wiki/GNU_Free_Documentation_License" title="GNU Free Documentation License">GFDL</a></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://www.w3.org/Graphics/JPEG/jfif3.pdf"><span style="font-style:italic;">Formato file JFIF</span></a> (<span style="font-weight: bolder; font-size:80%"><abbr title="documento in formato PDF">PDF</abbr></span>), su <span style="font-style:italic;">w3.org</span>.</cite></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 href="/wiki/Compressione_dell%27immagine" title="Compressione dell'immagine">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 class="mw-selflink selflink">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; 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