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class="vector-menu-heading"> Pagine per utenti anonimi <a href="/wiki/Aiuto:Benvenuto" aria-label="Ulteriori informazioni sulla contribuzione"><span>ulteriori informazioni</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Speciale:MieiContributi" title="Un elenco delle modifiche fatte da questo indirizzo IP [y]" accesskey="y"><span>contributi</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Speciale:MieDiscussioni" title="Discussioni sulle modifiche fatte da questo indirizzo IP [n]" accesskey="n"><span>discussioni</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Sito"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Indice" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Indice</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">sposta nella barra laterale</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">nascondi</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Inizio</div> </a> </li> <li id="toc-Descrizione" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Descrizione"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Descrizione</span> </div> </a> <ul id="toc-Descrizione-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Proprietà" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Proprietà"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Proprietà</span> </div> </a> <ul id="toc-Proprietà-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Formati_di_immagini_raster" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Formati_di_immagini_raster"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Formati di immagini raster</span> </div> </a> <button aria-controls="toc-Formati_di_immagini_raster-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 Formati di immagini raster</span> </button> <ul id="toc-Formati_di_immagini_raster-sublist" class="vector-toc-list"> <li id="toc-Non_compressi" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Non_compressi"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.1</span> <span>Non compressi</span> </div> </a> <ul id="toc-Non_compressi-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Con_compressione_lossless" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Con_compressione_lossless"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.2</span> <span>Con compressione lossless</span> </div> </a> <ul id="toc-Con_compressione_lossless-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Con_compressione_lossy" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Con_compressione_lossy"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.3</span> <span>Con compressione lossy</span> </div> </a> <ul id="toc-Con_compressione_lossy-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Applicazioni_ed_utilizzo" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Applicazioni_ed_utilizzo"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Applicazioni ed utilizzo</span> </div> </a> <ul id="toc-Applicazioni_ed_utilizzo-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Note" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Note"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</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">6</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">7</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">8</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" > <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">Grafica raster</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 56 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-56" 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">56 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%B1%D8%B3%D9%88%D9%85%D9%8A%D8%A7%D8%AA_%D9%86%D9%82%D8%B7%D9%8A%D8%A9" title="رسوميات نقطية - arabo" lang="ar" hreflang="ar" data-title="رسوميات نقطية" data-language-autonym="العربية" data-language-local-name="arabo" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Rastr_t%C9%99svir" title="Rastr təsvir - azerbaigiano" lang="az" hreflang="az" data-title="Rastr təsvir" 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/%D0%A0%D0%B0%D1%81%D1%82%D1%80%D0%B0%D0%B2%D0%B0%D1%8F_%D0%B3%D1%80%D0%B0%D1%84%D1%96%D0%BA%D0%B0" title="Растравая графіка - bielorusso" lang="be" hreflang="be" data-title="Растравая графіка" data-language-autonym="Беларуская" data-language-local-name="bielorusso" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%A0%D0%B0%D1%81%D1%82%D1%80%D0%B0%D0%B2%D0%B0%D1%8F_%D0%B3%D1%80%D0%B0%D1%84%D1%96%D0%BA%D0%B0" title="Растравая графіка - Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Растравая графіка" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%A0%D0%B0%D1%81%D1%82%D0%B5%D1%80%D0%BD%D0%B0_%D0%B3%D1%80%D0%B0%D1%84%D0%B8%D0%BA%D0%B0" title="Растерна графика - bulgaro" lang="bg" hreflang="bg" data-title="Растерна графика" 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%B0%E2%80%8C%E0%A7%8D%E0%A6%AF%E0%A6%BE%E0%A6%B8%E0%A7%8D%E0%A6%9F%E0%A6%BE%E0%A6%B0_%E0%A6%97%E0%A7%8D%E0%A6%B0%E0%A6%BE%E0%A6%AB%E0%A6%BF%E0%A6%95%E0%A7%8D%E0%A6%B8" title="র‌্যাস্টার গ্রাফিক্স - bengalese" lang="bn" hreflang="bn" data-title="র‌্যাস্টার গ্রাফিক্স" 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/Rasterska_grafika" title="Rasterska grafika - bosniaco" lang="bs" hreflang="bs" data-title="Rasterska grafika" 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/Mapa_de_bits" title="Mapa de bits - catalano" lang="ca" hreflang="ca" data-title="Mapa de bits" 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/Rastrov%C3%A1_grafika" title="Rastrová grafika - ceco" lang="cs" hreflang="cs" data-title="Rastrová grafika" 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/Rasterbillede" title="Rasterbillede - danese" lang="da" hreflang="da" data-title="Rasterbillede" 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/Rastergrafik" title="Rastergrafik - tedesco" lang="de" hreflang="de" data-title="Rastergrafik" data-language-autonym="Deutsch" data-language-local-name="tedesco" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Raster_graphics" title="Raster graphics - inglese" lang="en" hreflang="en" data-title="Raster graphics" 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/Rastruma_bildo" title="Rastruma bildo - esperanto" lang="eo" hreflang="eo" data-title="Rastruma bildo" 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/Imagen_de_mapa_de_bits" title="Imagen de mapa de bits - spagnolo" lang="es" hreflang="es" data-title="Imagen de mapa de bits" 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/Rastergraafika" title="Rastergraafika - estone" lang="et" hreflang="et" data-title="Rastergraafika" 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/Raster_irudi" title="Raster irudi - basco" lang="eu" hreflang="eu" data-title="Raster irudi" 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/%DA%AF%D8%B1%D8%A7%D9%81%DB%8C%DA%A9_%D8%B4%D8%B7%D8%B1%D9%86%D8%AC%DB%8C" title="گرافیک شطرنجی - persiano" lang="fa" hreflang="fa" data-title="گرافیک شطرنجی" 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/Bittikarttagrafiikka" title="Bittikarttagrafiikka - finlandese" lang="fi" hreflang="fi" data-title="Bittikarttagrafiikka" 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/Image_matricielle" title="Image matricielle - francese" lang="fr" hreflang="fr" data-title="Image matricielle" data-language-autonym="Français" data-language-local-name="francese" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Grafaic_rastair" title="Grafaic rastair - irlandese" lang="ga" hreflang="ga" data-title="Grafaic rastair" data-language-autonym="Gaeilge" data-language-local-name="irlandese" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Imaxe_de_mapa_de_bits" title="Imaxe de mapa de bits - galiziano" lang="gl" hreflang="gl" data-title="Imaxe de mapa de bits" 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/%D7%AA%D7%9E%D7%95%D7%A0%D7%AA_%D7%9E%D7%A4%D7%AA_%D7%A1%D7%99%D7%91%D7%99%D7%95%D7%AA" title="תמונת מפת סיביות - ebraico" lang="he" hreflang="he" data-title="תמונת מפת סיביות" data-language-autonym="עברית" data-language-local-name="ebraico" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Rasterska_slika" title="Rasterska slika - croato" lang="hr" hreflang="hr" data-title="Rasterska slika" 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/Rasztergrafika" title="Rasztergrafika - ungherese" lang="hu" hreflang="hu" data-title="Rasztergrafika" 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/%D5%8A%D5%A1%D5%BF%D5%AF%D5%A5%D6%80%D5%A1%D6%81%D5%A1%D5%B6%D6%81%D5%A1%D5%B5%D5%AB%D5%B6_%D5%A3%D6%80%D5%A1%D6%86%D5%AB%D5%AF%D5%A1" title="Պատկերացանցային գրաֆիկա - armeno" lang="hy" hreflang="hy" data-title="Պատկերացանցային գրաֆիկա" 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/Gambar_bitmap" title="Gambar bitmap - indonesiano" lang="id" hreflang="id" data-title="Gambar bitmap" 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-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Grafiko_rastrala" title="Grafiko rastrala - ido" lang="io" hreflang="io" data-title="Grafiko rastrala" data-language-autonym="Ido" data-language-local-name="ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/Rastamynd" title="Rastamynd - islandese" lang="is" hreflang="is" data-title="Rastamynd" 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/%E3%83%93%E3%83%83%E3%83%88%E3%83%9E%E3%83%83%E3%83%97%E7%94%BB%E5%83%8F" title="ビットマップ画像 - giapponese" lang="ja" hreflang="ja" data-title="ビットマップ画像" 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-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%A0%E1%83%90%E1%83%A1%E1%83%A2%E1%83%A0%E1%83%A3%E1%83%9A%E1%83%98_%E1%83%92%E1%83%90%E1%83%9B%E1%83%9D%E1%83%A1%E1%83%90%E1%83%AE%E1%83%A3%E1%83%9A%E1%83%94%E1%83%91%E1%83%90" title="რასტრული გამოსახულება - georgiano" lang="ka" hreflang="ka" data-title="რასტრული გამოსახულება" data-language-autonym="ქართული" data-language-local-name="georgiano" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%A0%D0%B0%D1%81%D1%82%D1%80%D0%BB%D1%8B%D2%9B_%D0%BA%D0%B5%D1%81%D0%BA%D1%96%D0%BD" title="Растрлық кескін - kazako" lang="kk" hreflang="kk" data-title="Растрлық кескін" data-language-autonym="Қазақша" data-language-local-name="kazako" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%9E%98%EC%8A%A4%ED%84%B0_%EA%B7%B8%EB%9E%98%ED%94%BD%EC%8A%A4" title="래스터 그래픽스 - coreano" lang="ko" hreflang="ko" data-title="래스터 그래픽스" data-language-autonym="한국어" data-language-local-name="coreano" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Ta%C5%A1kin%C4%97_grafika" title="Taškinė grafika - lituano" lang="lt" hreflang="lt" data-title="Taškinė grafika" 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/Rastra_grafika" title="Rastra grafika - lettone" lang="lv" hreflang="lv" data-title="Rastra grafika" data-language-autonym="Latviešu" data-language-local-name="lettone" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mhr mw-list-item"><a href="https://mhr.wikipedia.org/wiki/%D0%93%D1%80%D0%B0%D1%84%D0%B8%D0%BA%D0%B5_%D0%B8%D0%BD%D1%84%D0%BE%D1%80%D0%BC%D0%B0%D1%86%D0%B8%D0%B9%D1%8B%D0%BC_%D1%80%D0%B0%D1%81%D1%82%D1%80%D0%BB%D0%B5_%D0%BA%D0%BE%D0%B4%D0%BB%D1%8B%D0%BC%D0%B0%D1%88" title="Графике информацийым растрле кодлымаш - Eastern Mari" lang="mhr" hreflang="mhr" data-title="Графике информацийым растрле кодлымаш" data-language-autonym="Олык марий" data-language-local-name="Eastern Mari" class="interlanguage-link-target"><span>Олык марий</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Grafik_raster" title="Grafik raster - malese" lang="ms" hreflang="ms" data-title="Grafik raster" 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-my mw-list-item"><a href="https://my.wikipedia.org/wiki/Bit_map" title="Bit map - birmano" lang="my" hreflang="my" data-title="Bit map" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="birmano" class="interlanguage-link-target"><span>မြန်မာဘာသာ</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Rasterafbeelding" title="Rasterafbeelding - olandese" lang="nl" hreflang="nl" data-title="Rasterafbeelding" data-language-autonym="Nederlands" data-language-local-name="olandese" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Rastergrafikk" title="Rastergrafikk - norvegese bokmål" lang="nb" hreflang="nb" data-title="Rastergrafikk" 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-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Grafika_rastrowa" title="Grafika rastrowa - polacco" lang="pl" hreflang="pl" data-title="Grafika rastrowa" 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/Raster" title="Raster - portoghese" lang="pt" hreflang="pt" data-title="Raster" data-language-autonym="Português" data-language-local-name="portoghese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%A0%D0%B0%D1%81%D1%82%D1%80%D0%BE%D0%B2%D0%B0%D1%8F_%D0%B3%D1%80%D0%B0%D1%84%D0%B8%D0%BA%D0%B0" title="Растровая графика - russo" lang="ru" hreflang="ru" data-title="Растровая графика" 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/Rasterska_grafika" title="Rasterska grafika - serbo-croato" lang="sh" hreflang="sh" data-title="Rasterska grafika" 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/Raster_graphics" title="Raster graphics - Simple English" lang="en-simple" hreflang="en-simple" data-title="Raster graphics" 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/Rastrov%C3%A1_grafika" title="Rastrová grafika - slovacco" lang="sk" hreflang="sk" data-title="Rastrová grafika" 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/Rastrska_grafika" title="Rastrska grafika - sloveno" lang="sl" hreflang="sl" data-title="Rastrska grafika" data-language-autonym="Slovenščina" data-language-local-name="sloveno" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%A0%D0%B0%D1%81%D1%82%D0%B5%D1%80%D1%81%D0%BA%D0%B0_%D0%B3%D1%80%D0%B0%D1%84%D0%B8%D0%BA%D0%B0" title="Растерска графика - serbo" lang="sr" hreflang="sr" data-title="Растерска графика" 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-su mw-list-item"><a href="https://su.wikipedia.org/wiki/Gambar_bitmap" title="Gambar bitmap - sundanese" lang="su" hreflang="su" data-title="Gambar bitmap" data-language-autonym="Sunda" data-language-local-name="sundanese" class="interlanguage-link-target"><span>Sunda</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Rastergrafik" title="Rastergrafik - svedese" lang="sv" hreflang="sv" data-title="Rastergrafik" 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%B8%A0%E0%B8%B2%E0%B8%9E%E0%B8%81%E0%B8%A3%E0%B8%B2%E0%B8%9F%E0%B8%B4%E0%B8%81%E0%B8%AA%E0%B9%8C%E0%B9%81%E0%B8%A3%E0%B8%AA%E0%B9%80%E0%B8%95%E0%B8%AD%E0%B8%A3%E0%B9%8C" title="ภาพกราฟิกส์แรสเตอร์ - thailandese" lang="th" hreflang="th" data-title="ภาพกราฟิกส์แรสเตอร์" data-language-autonym="ไทย" data-language-local-name="thailandese" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Grapikong_raster" title="Grapikong raster - tagalog" lang="tl" hreflang="tl" data-title="Grapikong raster" data-language-autonym="Tagalog" data-language-local-name="tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Raster_grafik" title="Raster grafik - turco" lang="tr" hreflang="tr" data-title="Raster grafik" 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/%D0%A0%D0%B0%D1%81%D1%82%D1%80%D0%BE%D0%B2%D0%B0_%D0%B3%D1%80%D0%B0%D1%84%D1%96%D0%BA%D0%B0" title="Растрова графіка - ucraino" lang="uk" hreflang="uk" data-title="Растрова графіка" data-language-autonym="Українська" data-language-local-name="ucraino" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/%C4%90%E1%BB%93_h%E1%BB%8Da_raster" title="Đồ họa raster - vietnamita" lang="vi" hreflang="vi" data-title="Đồ họa raster" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamita" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E4%BD%8D%E5%9B%BE" title="位图 - cinese" lang="zh" hreflang="zh" data-title="位图" 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/%E9%BB%9E%E9%99%A3%E5%9C%96" title="點陣圖 - cantonese" lang="yue" hreflang="yue" data-title="點陣圖" 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/Q182270#sitelinks-wikipedia" title="Modifica collegamenti interlinguistici" class="wbc-editpage">Modifica collegamenti</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div 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0;padding:.2em .5em}body:not(.skin-minerva) .mw-parser-output .hatnote-text{padding-left:.5em}body.skin-minerva .mw-parser-output .hatnote-icon{padding-right:8px}body.skin-minerva .mw-parser-output .hatnote-icon img{height:auto;width:16px}body.skin--responsive .mw-parser-output .hatnote a.new{color:#d73333}body.skin--responsive .mw-parser-output .hatnote a.new:visited{color:#a55858}</style> <div class="hatnote noprint nota-disambigua"> <div class="hatnote-content"><span class="noviewer hatnote-icon" typeof="mw:File"><span><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Nota_disambigua.svg/18px-Nota_disambigua.svg.png" decoding="async" width="18" height="18" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Nota_disambigua.svg/27px-Nota_disambigua.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Nota_disambigua.svg/36px-Nota_disambigua.svg.png 2x" data-file-width="200" data-file-height="200" /></span></span> <span class="hatnote-text"><a href="/wiki/Aiuto:Disambiguazione" title="Aiuto:Disambiguazione">Disambiguazione</a> – "Bitmap" rimanda qui. Se stai cercando il <a href="/wiki/Formato_di_file" class="mw-redirect" title="Formato di file">formato di file</a> .bmp, vedi <b><a href="/wiki/Windows_bitmap" title="Windows bitmap">Windows bitmap</a></b>.</span></div> </div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Rgb-raster-image.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/3b/Rgb-raster-image.svg/220px-Rgb-raster-image.svg.png" decoding="async" width="220" height="239" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/3b/Rgb-raster-image.svg/330px-Rgb-raster-image.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/3b/Rgb-raster-image.svg/440px-Rgb-raster-image.svg.png 2x" data-file-width="368" data-file-height="400" /></a><figcaption>Esempio di un raster RGB</figcaption></figure> <p>La <b>grafica raster</b> (detta anche <b>grafica bitmap</b> o semplicemente <b>bitmap</b>), nella <a href="/wiki/Computer_grafica" title="Computer grafica">computer grafica</a>, è una tecnica usata per descrivere un'<a href="/wiki/Immagine" title="Immagine">immagine</a> in <a href="/wiki/Formato_digitale" class="mw-redirect" title="Formato digitale">formato digitale</a> che si contrappone alla <a href="/wiki/Grafica_vettoriale" title="Grafica vettoriale">grafica vettoriale</a>. </p><p>Il termine <i>raster</i> (in italiano: trama, reticolo, griglia o rasta) ha origine nella tecnologia <a href="/wiki/Cinescopio" class="mw-redirect" title="Cinescopio">televisiva</a> analogica, ovvero dal termine che indica le righe orizzontali (dette anche <i>scan line</i> o <a href="/wiki/Linee_di_scansione" title="Linee di scansione">linee di scansione</a>, dei televisori o dei monitor<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>). </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Descrizione">Descrizione</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Grafica_raster&veaction=edit&section=1" title="Modifica la sezione Descrizione" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Grafica_raster&action=edit&section=1" title="Edit section's source code: Descrizione"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Nella <a href="/wiki/Computer_grafica" title="Computer grafica">computer grafica</a>, <i>raster</i> indica la griglia ortogonale di punti che costituisce un'immagine. Nella grafica raster l'immagine viene vista come una scacchiera e ad ogni elemento della scacchiera, chiamato <a href="/wiki/Pixel" title="Pixel">pixel</a>, viene associato uno specifico colore. Il colore può essere definito con due tecniche: </p> <ul><li>se l'immagine contiene pochi colori (massimo 256) si crea un elenco dei colori da utilizzare e nella scacchiera viene inserito l'indice che punta allo specifico colore del pixel<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>;</li> <li>se l'immagine contiene molti colori il singolo pixel non definisce l'indice con il quale si punta a una <a href="/wiki/Tavolozza_(informatica)" title="Tavolozza (informatica)">tavolozza</a> di colori, ma direttamente il colore.</li></ul> <p>Il colore viene definito ad esempio come una combinazione di tre componenti: blu, rosso, verde. Questo non è l'unico modo di definire un colore, esistono altri modi che vengono chiamati <a href="/wiki/Spazio_dei_colori" title="Spazio dei colori">spazi di colore</a>, ma nel caso delle immagini generate al computer il sistema <a href="/wiki/RGB" title="RGB">RGB</a> (<b>R</b>ED Rosso, <b>G</b>REEN Verde, <b>B</b>LUE Blu) è il più diffuso dato che le <a href="/wiki/Scheda_grafica" class="mw-redirect" title="Scheda grafica">schede grafiche</a> lo utilizzano nativamente per generare il segnale da visualizzare con il <a href="/wiki/Display" title="Display">monitor</a><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> <div class="mw-heading mw-heading2"><h2 id="Proprietà"><span id="Propriet.C3.A0"></span>Proprietà</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Grafica_raster&veaction=edit&section=2" title="Modifica la sezione Proprietà" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Grafica_raster&action=edit&section=2" title="Edit section's source code: Proprietà"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>La bitmap è caratterizzata da due proprietà<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup>: </p> <ul><li><a href="/wiki/Risoluzione_(grafica)" title="Risoluzione (grafica)">risoluzione</a>;</li> <li><a href="/wiki/Profondit%C3%A0_di_colore" title="Profondità di colore">profondità</a>.</li></ul> <p>La prima è determinata dal numero di pixel contenuti nell'unità di misura considerata (in genere il <a href="/wiki/Pollice_(unit%C3%A0_di_misura)" title="Pollice (unità di misura)">pollice</a> inglese, equivalente a 2,54 cm); si misura in <i>PPI</i> (<i>Pixel Per Inch</i>) oppure in <i>DPI</i> (<i>Dot Per Inch)</i>, <a href="/wiki/Punti_per_pollice" title="Punti per pollice">Punti per pollice</a>). La seconda è definita dalla memoria che si dedica ad ogni pixel, ovvero dal numero di bit dedicati ad ogni pixel per descrivere il colore, e si misura in <i>BPP</i> (<i>Bit Per Pixel</i>); maggiore è il numero di bit, maggiore è il numero di colori che è possibile descrivere. </p><p>Un altro comune metodo per indicare la qualità delle immagini raster, tipico della <a href="/wiki/Fotografia_digitale" title="Fotografia digitale">fotografia digitale</a>, è moltiplicare il numero delle righe di pixel per quello delle colonne di pixel ed esprimere il valore in <a href="/wiki/Megapixel" class="mw-redirect" title="Megapixel">megapixel</a>. </p><p>La grafica bitmap non è vantaggiosa se l'utente necessita di apportare modifiche all'immagine, perché nel caso ad esempio di uno <a href="/wiki/Zoom" title="Zoom">zoom</a>, la risoluzione e quindi la qualità dell'immagine peggiora. I <a href="/wiki/Software" title="Software">software</a> grafici, per ridurre il problema, sono in grado di ripristinare la risoluzione inserendo nuovi pixel che vengono calcolati facendo una <a href="/wiki/Interpolazione" title="Interpolazione">interpolazione</a>, il processo inserisce, perciò, deliberatamente una quantità di informazioni <i>presunte</i> e non necessariamente reali. La grafica bitmap si mostra idonea per rappresentare immagini della realtà, per modificare contrasti e luminosità di queste, per applicare filtri di colore. </p> <div class="mw-heading mw-heading2"><h2 id="Formati_di_immagini_raster">Formati di immagini raster</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Grafica_raster&veaction=edit&section=3" title="Modifica la sezione Formati di immagini raster" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Grafica_raster&action=edit&section=3" title="Edit section's source code: Formati di immagini raster"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>I dati raster possono essere memorizzati attraverso tipologie di file che sfruttano algoritmi di compressione diversi, gravando in modo differente sul supporto di memorizzazione. I formati raster più comuni sono i seguenti: </p> <div class="mw-heading mw-heading3"><h3 id="Non_compressi">Non compressi</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Grafica_raster&veaction=edit&section=4" title="Modifica la sezione Non compressi" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Grafica_raster&action=edit&section=4" title="Edit section's source code: Non compressi"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Questi formati di file hanno richieste di elaborazione minima, non essendo necessari algoritmi di compressione (in fase di scrittura) e decompressione (in fase di lettura), tuttavia, mancando di compressione, risultano particolarmente voluminosi, in termini di spazio occupato su disco (o altro dispositivo di memorizzazione), rispetto agli altri formati: </p> <ul><li><a href="/wiki/Raw_(fotografia)" title="Raw (fotografia)">raw</a></li> <li><a href="/wiki/Windows_bitmap" title="Windows bitmap">bmp</a> (in alcuni casi i file bmp sono compressi con un algoritmo <a href="/wiki/Run-length_encoding" title="Run-length encoding">RLE</a>)</li></ul> <div class="mw-heading mw-heading3"><h3 id="Con_compressione_lossless">Con compressione lossless</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Grafica_raster&veaction=edit&section=5" title="Modifica la sezione Con compressione lossless" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Grafica_raster&action=edit&section=5" title="Edit section's source code: Con compressione lossless"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Le immagini salvate con un <a href="/wiki/Algoritmo" title="Algoritmo">algoritmo</a> di <a href="/wiki/Compressione_dati_lossless" class="mw-redirect" title="Compressione dati lossless">compressione dati lossless</a> occupano meno spazio nei dispositivi di memorizzazione, mantenendo inalterata tutta l'informazione originale<sup id="cite_ref-:0_7-0" class="reference"><a href="#cite_note-:0-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-:1_8-0" class="reference"><a href="#cite_note-:1-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup>: </p> <ul><li><a href="/wiki/Portable_Network_Graphics" title="Portable Network Graphics">png</a> (certe applicazioni permettono anche la scrittura di file png non compressi)</li> <li><a href="/wiki/TGA_(formato_di_file)" title="TGA (formato di file)">tga</a></li> <li><a href="/wiki/Tagged_Image_File_Format" class="mw-redirect" title="Tagged Image File Format">tiff</a> (sebbene questo sia l'uso più comune, questo formato permette diversi tipi di compressione)</li> <li><a href="/wiki/Graphics_Interchange_Format" title="Graphics Interchange Format">gif</a> (per immagini fino a 256 colori)</li></ul> <div class="mw-heading mw-heading3"><h3 id="Con_compressione_lossy">Con compressione lossy</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Grafica_raster&veaction=edit&section=6" title="Modifica la sezione Con compressione lossy" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Grafica_raster&action=edit&section=6" title="Edit section's source code: Con compressione lossy"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Le immagini memorizzate con un algoritmo di compressione <a href="/wiki/Compressione_dati_lossy" title="Compressione dati lossy">lossy</a> subiscono una perdita di informazione; pertanto questa tecnica non è adatta per <i>salvare</i> le immagini che vengono rielaborate coi programmi di fotoritocco (le continue modifiche comporterebbero un progressivo degrado dell'immagine ad ogni salvataggio e riapertura); invece, in virtù delle ridotte dimensioni del file, sono particolarmente indicate per la trasmissione di immagini o per ridurre le dimensioni di un'applicazione o di un prodotto da distribuire<sup id="cite_ref-:0_7-1" class="reference"><a href="#cite_note-:0-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-:1_8-1" class="reference"><a href="#cite_note-:1-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup>. </p> <ul><li><a href="/wiki/Joint_Photographic_Experts_Group" class="mw-redirect" title="Joint Photographic Experts Group">jpeg</a></li> <li><a href="/wiki/Graphics_Interchange_Format" title="Graphics Interchange Format">gif</a> (per immagini con più di 256 colori si ottiene una compressione <b>lossy</b> quando si parte da un'immagine a profondità di colore maggiore e vengono di conseguenza eliminate la maggior parte delle sfumature)</li></ul> <div class="mw-heading mw-heading2"><h2 id="Applicazioni_ed_utilizzo">Applicazioni ed utilizzo</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Grafica_raster&veaction=edit&section=7" title="Modifica la sezione Applicazioni ed utilizzo" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Grafica_raster&action=edit&section=7" title="Edit section's source code: Applicazioni ed utilizzo"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Nel campo dei <a href="/wiki/Sistema_informativo_territoriale" class="mw-redirect" title="Sistema informativo territoriale">Sistemi informativi territoriali</a> o GIS, la locuzione è usata per indicare la tipologia di dato impiegata nella rappresentazione cartografica digitale. Con i dati raster il territorio viene riprodotto attraverso una matrice di pixel di forma quadrata o rettangolare. A ciascun pixel è associato un attributo che definisce le caratteristiche dell'elemento rappresentato. </p><p>Ad esempio in un <a href="/wiki/Modello_digitale_di_elevazione" title="Modello digitale di elevazione">modello digitale di elevazione</a> a ciascun pixel è associato il valore della quota sul livello del mare in quel punto. La dimensione dei pixel è inversamente proporzionale alla precisione della carta. I dati raster possono essere implementati in un sistema GIS mediante acquisizione diretta con apparecchiature a lettura ottica quali ad esempio <a href="/wiki/Scansionatore_d%27immagine" class="mw-redirect" title="Scansionatore d'immagine">scanner d'immagini</a> o attraverso l'elaborazione di dati, raster o <a href="/wiki/Grafica_vettoriale" title="Grafica vettoriale">vettoriali</a>, già acquisiti<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup>. </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=Grafica_raster&veaction=edit&section=8" 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=Grafica_raster&action=edit&section=8" title="Edit section's source code: Note"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><a href="#cite_ref-1"><b>^</b></a> <span class="reference-text"><a rel="nofollow" class="external autonumber" href="https://www.answers.com/topic/raster">[1]</a></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"> <a rel="nofollow" class="external text" href="http://courses.washington.edu/arch481/1.Tapestry%20Reader/2.The%20Camera/1.Digital%20%27Film%27/2.Raster.html"><span style="font-style:italic;">Digital Film: Raster Graphics</span></a>, su <span style="font-style:italic;">courses.washington.edu</span>. <small>URL consultato il 30 ottobre 2021</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://www.wikibit.it/r/cosa-significa-rgb-1081/"><span style="font-style:italic;">Cosa significa RGB</span></a>, su <span style="font-style:italic;">Wikibit</span>, 30 marzo 2017. <small>URL consultato il 30 ottobre 2021</small>.</cite></span> </li> <li id="cite_note-4"><a href="#cite_ref-4"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="http://www.computer-facile.com/computer/352-cosa-sono-le-immagini-bitmap"><span style="font-style:italic;">Cosa sono le immagini bitmap</span></a>, su <span style="font-style:italic;">www.computer-facile.com</span>. <small>URL consultato il 30 ottobre 2021</small>.</cite></span> </li> <li id="cite_note-5"><a href="#cite_ref-5"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> adegeo, <a rel="nofollow" class="external text" href="https://docs.microsoft.com/it-it/dotnet/desktop/winforms/advanced/types-of-bitmaps"><span style="font-style:italic;">Tipi di bitmap - Windows Forms .NET Framework</span></a>, su <span style="font-style:italic;">docs.microsoft.com</span>. <small>URL consultato il 30 ottobre 2021</small>.</cite></span> </li> <li id="cite_note-6"><a href="#cite_ref-6"><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>) <a rel="nofollow" class="external text" href="http://paulbourke.net/dataformats/bitmaps/index_it.html"><span style="font-style:italic;">Manuale per Principianti sulle Bitmap</span></a>, su <span style="font-style:italic;">paulbourke.net</span>. <small>URL consultato il 30 ottobre 2021</small>.</cite></span> </li> <li id="cite_note-:0-7"><span class="mw-cite-backlink"><b>^</b> <sup><i><a href="#cite_ref-:0_7-0">a</a></i></sup> <sup><i><a href="#cite_ref-:0_7-1">b</a></i></sup></span> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="https://tecnologia.libero.it/file-multimediali-lossy-e-lossless-differenze-jpg-e-png-o-mp3-e-flac-14259"><span style="font-style:italic;">File multimediali lossy e lossless: differenze JPG e PNG o MP3 e FLAC</span></a>, su <span style="font-style:italic;">tecnologia.libero.it</span>. <small>URL consultato il 30 ottobre 2021</small>.</cite></span> </li> <li id="cite_note-:1-8"><span class="mw-cite-backlink"><b>^</b> <sup><i><a href="#cite_ref-:1_8-0">a</a></i></sup> <sup><i><a href="#cite_ref-:1_8-1">b</a></i></sup></span> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="http://www.di-srv.unisa.it/~ads/TesineAsd2/Introduzione/testo3.htm"><span style="font-style:italic;">Algoritmi Losseless e Lossy</span></a>, su <span style="font-style:italic;">www.di-srv.unisa.it</span>. <small>URL consultato il 30 ottobre 2021</small>.</cite></span> </li> <li id="cite_note-9"><a href="#cite_ref-9"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="https://www.grafigata.com/differenza-raster-vettoriale-grafica/"><span style="font-style:italic;">Qual è la differenza tra raster e vettoriale nella grafica?</span></a>, su <span style="font-style:italic;">Grafigata!</span>, 2 novembre 2014. <small>URL consultato il 30 ottobre 2021</small>.</cite></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Voci_correlate">Voci correlate</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Grafica_raster&veaction=edit&section=9" 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=Grafica_raster&action=edit&section=9" 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/Computer_grafica" title="Computer grafica">Computer grafica</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_vettoriale" title="Grafica vettoriale">Grafica vettoriale</a></li> <li><a href="/wiki/Immagine_digitale" title="Immagine digitale">Immagine digitale</a></li> <li><a href="/wiki/Rasterizzazione" title="Rasterizzazione">Rasterizzazione</a></li> <li><a href="/wiki/RGB" title="RGB">RGB</a></li> <li><a href="/wiki/Sprite_(informatica)" title="Sprite (informatica)">Sprite (informatica)</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=Grafica_raster&veaction=edit&section=10" 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=Grafica_raster&action=edit&section=10" title="Edit section's source code: Altri progetti"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div id="interProject" class="toccolours" style="display: none; clear: both; margin-top: 2em"><p id="sisterProjects" style="background-color: #efefef; color: black; font-weight: bold; margin: 0"><span>Altri progetti</span></p><ul title="Collegamenti verso gli altri progetti Wikimedia"> <li class="" title=""><span class="plainlinks" title="commons:Category:Raster graphics"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Raster_graphics?uselang=it">Wikimedia Commons</a></span></li></ul></div> <ul><li><span typeof="mw:File"><a href="https://commons.wikimedia.org/wiki/?uselang=it" title="Collabora a Wikimedia Commons"><img alt="Collabora a Wikimedia Commons" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png" decoding="async" width="18" height="24" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/27px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/36px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span> <span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/?uselang=it">Wikimedia Commons</a></span> contiene immagini o altri file sulla <b><span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Raster_graphics?uselang=it">grafica raster</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=Grafica_raster&veaction=edit&section=11" 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=Grafica_raster&action=edit&section=11" title="Edit section's source code: Collegamenti esterni"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li class="mw-empty-elt"></li> <li><cite id="CITEREFEnciclopedia_della_Matematica" class="citation libro" style="font-style:normal"> <a rel="nofollow" class="external text" href="https://www.treccani.it/enciclopedia/raster_(Enciclopedia-della-Matematica)/"><span style="font-style:italic;">raster</span></a>, in <span style="font-style:italic;">Enciclopedia della Matematica</span>, <a href="/wiki/Istituto_dell%27Enciclopedia_Italiana" title="Istituto dell'Enciclopedia Italiana">Istituto dell'Enciclopedia Italiana</a>, 2013.</cite> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q182270#P9621" 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/topic/raster-graphics"><span style="font-style:italic;">raster graphics</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/Q182270#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/raster_graphics" class="extiw" title="foldoc:raster graphics">Grafica raster</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></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-Software_di_grafica_raster"><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:Software_di_grafica_raster" title="Template:Software di grafica raster"><span title="Vai alla pagina del template">V</span></a> · <a href="/w/index.php?title=Discussioni_template:Software_di_grafica_raster&action=edit&redlink=1" class="new" title="Discussioni template:Software di grafica raster (la pagina non esiste)"><span title="Discuti del template">D</span></a> · <a class="external text" href="https://it.wikipedia.org/w/index.php?title=Template:Software_di_grafica_raster&action=edit"><span title="Modifica il template. Usa l'anteprima prima di salvare">M</span></a></div></div><span class="navbox_title">Software per <a class="mw-selflink selflink">grafica raster</a></span></th></tr><tr><th colspan="1" class="navbox_group" style="text-align:right;"><a href="/wiki/Open_source" title="Open source">Open source</a></th><td colspan="1" class="navbox_list navbox_odd"><a href="/wiki/GIMP" title="GIMP">GIMP</a><b> ·</b> <a href="/wiki/DigiKam" title="DigiKam">DigiKam</a><b> ·</b> <a href="/wiki/Darktable" title="Darktable">darktable</a><b> ·</b> <a href="/wiki/Krita" title="Krita">Krita</a><b> ·</b> <a href="/wiki/KolourPaint" title="KolourPaint">KolourPaint</a><b> ·</b> <a href="/w/index.php?title=GNU_Paint&action=edit&redlink=1" class="new" title="GNU Paint (la pagina non esiste)">GNU Paint</a><b> ·</b> <a href="/wiki/MyPaint" title="MyPaint">MyPaint</a><b> ·</b> <a href="/wiki/Pinta_(software)" title="Pinta (software)">Pinta</a><b> ·</b> <a href="/wiki/RawTherapee" title="RawTherapee">RawTherapee</a><b> ·</b> <a href="/wiki/Tux_Paint" title="Tux Paint">Tux Paint</a><b> ·</b> <a href="/wiki/XPaint" title="XPaint">XPaint</a></td></tr><tr><th colspan="1" class="navbox_group" style="text-align:right;"><a href="/wiki/Software_proprietario" title="Software proprietario">Proprietari</a></th><td colspan="1" class="navbox_list navbox_even"><table class="subnavbox"><tbody><tr><th class="subnavbox_group">Commerciali</th><td colspan="1"><a href="/wiki/Adobe_Photoshop" title="Adobe Photoshop">Adobe Photoshop</a><b> ·</b> <a href="/wiki/Adobe_Photoshop_Elements" title="Adobe Photoshop Elements">Adobe Photoshop Elements</a><b> ·</b> <a href="/wiki/Adobe_Photoshop_Lightroom" title="Adobe Photoshop Lightroom">Adobe Photoshop Lightroom</a><b> ·</b> <a href="/wiki/Clip_Studio_Paint" title="Clip Studio Paint">Clip Studio Paint</a><b> ·</b> <a href="/wiki/Corel_Painter" title="Corel Painter">Corel Painter</a><b> ·</b> <a href="/w/index.php?title=Corel_Painter_Essentials&action=edit&redlink=1" class="new" title="Corel Painter Essentials (la pagina non esiste)">Corel Painter Essentials</a><b> ·</b> <a href="/wiki/Corel_Paint_Shop_Pro" title="Corel Paint Shop Pro">Corel Paint Shop Pro</a><b> ·</b> <a href="/wiki/Corel_Photo_Paint" title="Corel Photo Paint">Corel Photo Paint</a><b> ·</b> <a href="/w/index.php?title=Ulead_PhotoImpact&action=edit&redlink=1" class="new" title="Ulead PhotoImpact (la pagina non esiste)">Ulead PhotoImpact</a><b> ·</b> <a href="/w/index.php?title=NeoPaint&action=edit&redlink=1" class="new" title="NeoPaint (la pagina non esiste)">NeoPaint</a><b> ·</b> <a href="/w/index.php?title=Pixel_Studio_Pro&action=edit&redlink=1" class="new" title="Pixel Studio Pro (la pagina non esiste)">Pixel Image Editor</a><b> ·</b> <a href="/w/index.php?title=PhotoPerfect&action=edit&redlink=1" class="new" title="PhotoPerfect (la pagina non esiste)">PhotoPerfect</a><b> ·</b> <a href="/wiki/Pixelmator" title="Pixelmator">Pixelmator</a><b> ·</b> <a href="/w/index.php?title=RealWorld_Photos&action=edit&redlink=1" class="new" title="RealWorld Photos (la pagina non esiste)">RealWorld Photos</a><b> ·</b> <a href="/w/index.php?title=TVPaint&action=edit&redlink=1" class="new" title="TVPaint (la pagina non esiste)">TVPaint</a></td></tr><tr><th class="subnavbox_group"><a href="/wiki/Freeware" title="Freeware">Freeware</a></th><td colspan="1"><a href="/w/index.php?title=Artweaver&action=edit&redlink=1" class="new" title="Artweaver (la pagina non esiste)">Artweaver</a><b> ·</b> <a href="/wiki/Pixia" title="Pixia">Pixia</a><b> ·</b> <a href="/wiki/Paint" title="Paint">Paint</a><b> ·</b> <a href="/wiki/Paint.NET" title="Paint.NET">Paint.NET</a><b> ·</b> <a href="/w/index.php?title=PhotoScape&action=edit&redlink=1" class="new" title="PhotoScape (la pagina non esiste)">PhotoScape</a><b> ·</b> <a href="/wiki/IrfanView" title="IrfanView">IrfanView</a><b> ·</b> <a href="/w/index.php?title=Fatpaint&action=edit&redlink=1" class="new" title="Fatpaint (la pagina non esiste)">Fatpaint</a></td></tr></tbody></table></td></tr></tbody></table> <div class="noprint" style="width:100%; 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