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href="#Libraries"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>Libraries</span> </div> </a> <ul id="toc-Libraries-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Color_depth" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Color_depth"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Color depth</span> </div> </a> <ul id="toc-Color_depth-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Compression_methods" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Compression_methods"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Compression methods</span> </div> </a> <ul id="toc-Compression_methods-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Credits" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a 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Available in 18 languages" > <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-18" 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">18 languages</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%A3%D9%88%D8%A8%D9%86_%D8%A5%D9%83%D8%B3_%D8%A2%D8%B1" title="أوبن إكس آر – Arabic" lang="ar" hreflang="ar" data-title="أوبن إكس آر" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/OpenEXR" title="OpenEXR – Catalan" lang="ca" hreflang="ca" data-title="OpenEXR" data-language-autonym="Català" data-language-local-name="Catalan" 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/OpenEXR" title="OpenEXR – Czech" lang="cs" hreflang="cs" data-title="OpenEXR" data-language-autonym="Čeština" data-language-local-name="Czech" 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/OpenEXR" title="OpenEXR – Danish" lang="da" hreflang="da" data-title="OpenEXR" data-language-autonym="Dansk" data-language-local-name="Danish" 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/OpenEXR" title="OpenEXR – German" lang="de" hreflang="de" data-title="OpenEXR" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/OpenEXR" title="OpenEXR – Spanish" lang="es" hreflang="es" data-title="OpenEXR" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%A7%D9%BE%D9%86_%D8%A7%DB%8C%E2%80%8C%D8%A7%DA%A9%D8%B3%E2%80%8C%D8%A2%D8%B1" title="اپن ای‌اکس‌آر – Persian" lang="fa" hreflang="fa" data-title="اپن ای‌اکس‌آر" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/OpenEXR" title="OpenEXR – French" lang="fr" hreflang="fr" data-title="OpenEXR" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/OpenEXR" title="OpenEXR – Korean" lang="ko" hreflang="ko" data-title="OpenEXR" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/OpenEXR" title="OpenEXR – Italian" lang="it" hreflang="it" data-title="OpenEXR" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/OpenEXR" title="OpenEXR – Japanese" lang="ja" hreflang="ja" data-title="OpenEXR" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/OpenEXR" title="OpenEXR – Polish" lang="pl" hreflang="pl" data-title="OpenEXR" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/OpenEXR" title="OpenEXR – Russian" lang="ru" hreflang="ru" data-title="OpenEXR" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/OpenEXR" title="OpenEXR – Simple English" lang="en-simple" hreflang="en-simple" data-title="OpenEXR" 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-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/OpenEXR" title="OpenEXR – Ukrainian" lang="uk" hreflang="uk" data-title="OpenEXR" data-language-autonym="Українська" data-language-local-name="Ukrainian" 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/OpenEXR" title="OpenEXR – Vietnamese" lang="vi" hreflang="vi" data-title="OpenEXR" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamese" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-yo mw-list-item"><a href="https://yo.wikipedia.org/wiki/OpenEXR" title="OpenEXR – Yoruba" lang="yo" hreflang="yo" data-title="OpenEXR" data-language-autonym="Yorùbá" data-language-local-name="Yoruba" class="interlanguage-link-target"><span>Yorùbá</span></a></li><li class="interlanguage-link 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class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Image storage format for the motion picture industry</div> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox"><caption class="infobox-title" style="padding-bottom:0.15em;">OpenEXR</caption><tbody><tr><th scope="row" class="infobox-label" style="line-height:1.2em; padding-right:0.65em;"><a href="/wiki/Filename_extension" title="Filename extension">Filename extension</a></th><td class="infobox-data" style="line-height:1.35em;"><style data-mw-deduplicate="TemplateStyles:r886049734">.mw-parser-output .monospaced{font-family:monospace,monospace}</style><div class="monospaced"> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced">.exr</span></div></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em; padding-right:0.65em;"><a href="/wiki/Media_type" title="Media type">Internet media type</a></th><td class="infobox-data" style="line-height:1.35em;">image/x-exr</td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em; padding-right:0.65em;"><a href="/wiki/Uniform_Type_Identifier" title="Uniform Type Identifier">Uniform Type Identifier (UTI)</a></th><td class="infobox-data" style="line-height:1.35em;">com.ilm.openexr-image<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></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em; padding-right:0.65em;">Developed by</th><td class="infobox-data" style="line-height:1.35em;"><a href="/wiki/Industrial_Light_%26_Magic" title="Industrial Light & Magic">Industrial Light & Magic</a></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em; padding-right:0.65em;">Initial release</th><td class="infobox-data" style="line-height:1.35em;">1999<span class="noprint">; 25 years ago</span><span style="display:none"> (<span class="bday dtstart published updated">1999</span>)</span></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em; padding-right:0.65em;"><a href="/wiki/Software_release_life_cycle" title="Software release life cycle">Latest release</a></th><td class="infobox-data" style="line-height:1.35em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">3.3.1<sup id="cite_ref-wikidata-155adc1875b20fe41176e9a0d6823dca3c393844-v18_2-0" class="reference"><a href="#cite_note-wikidata-155adc1875b20fe41176e9a0d6823dca3c393844-v18-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><br />9 October 2024<span class="noprint">; 44 days ago</span><span style="display:none"> (<span class="bday dtstart published updated">9 October 2024</span>)</span> </div></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em; padding-right:0.65em;">Type of format</th><td class="infobox-data" style="line-height:1.35em;"><a href="/wiki/High-dynamic-range_imaging" class="mw-redirect" title="High-dynamic-range imaging">High-dynamic-range imaging</a></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em; padding-right:0.65em;"><span class="nowrap"><a href="/wiki/Open_file_format" title="Open file format">Open format</a>?</span></th><td class="infobox-data" style="line-height:1.35em;">Yes, <a href="/wiki/Modified_BSD_License" class="mw-redirect" title="Modified BSD License">Modified BSD License</a></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em; padding-right:0.65em;">Website</th><td class="infobox-data" style="line-height:1.35em;"><span class="url"><a rel="nofollow" class="external text" href="https://www.openexr.com/">www<wbr />.openexr<wbr />.com</a></span> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q1341482#P856" title="Edit this at Wikidata"><img alt="Edit this at Wikidata" src="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></td></tr></tbody></table> <p><b>OpenEXR</b> is a <a href="/wiki/High-dynamic-range_imaging" class="mw-redirect" title="High-dynamic-range imaging">high-dynamic range</a>, multi-channel <a href="/wiki/Raster_graphics" title="Raster graphics">raster</a> <a href="/wiki/File_format" title="File format">file format</a>, released as an <a href="/wiki/Open_standard" title="Open standard">open standard</a> along with a set of software tools created by <a href="/wiki/Industrial_Light_%26_Magic" title="Industrial Light & Magic">Industrial Light & Magic</a> (ILM), under a <a href="/wiki/Free_software_license" class="mw-redirect" title="Free software license">free software license</a> similar to the <a href="/wiki/BSD_license" class="mw-redirect" title="BSD license">BSD license</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><p>It is notable for supporting multiple <a href="/wiki/Channel_(digital_image)" title="Channel (digital image)">channels</a> of potentially different pixel sizes, including 32-bit unsigned integer, 32-bit and 16-bit floating point values, as well as various compression techniques which include <a href="/wiki/Lossless_data_compression" class="mw-redirect" title="Lossless data compression">lossless</a> and <a href="/wiki/Lossy_data_compression" class="mw-redirect" title="Lossy data compression">lossy compression</a> algorithms. It also has arbitrary channels and encodes multiple points of view such as left- and right-camera images.<sup id="cite_ref-technical_introduction_4-0" class="reference"><a href="#cite_note-technical_introduction-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Overview">Overview</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=OpenEXR&action=edit&section=1" title="Edit section: Overview"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A full technical introduction of the format is available on the OpenEXR website.<sup id="cite_ref-technical_introduction_4-1" class="reference"><a href="#cite_note-technical_introduction-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p><p>OpenEXR, or EXR for short, is a deep raster format developed by ILM and broadly used in the computer-graphics industry, both visual effects and animation. </p><p>OpenEXR's multi-resolution and arbitrary channel format makes it appealing for <a href="/wiki/Digital_compositing" title="Digital compositing">compositing</a>, as it alleviates several painful elements of the process. Since it can store arbitrary channels—<a href="/wiki/Specularity" title="Specularity">specular</a>, diffuse, <a href="/wiki/Alpha_compositing" title="Alpha compositing">alpha</a>, RGB, normals, and various other types—in one file, it takes away the need to store this information in separate files. The multi-channel concept also reduces the necessity to "bake" in the aforementioned data to the final image. If a compositor is not happy with the current level of <a href="/wiki/Specularity" title="Specularity">specularity</a>, they can adjust that specific channel.<sup id="cite_ref-EXR_file_layout_5-0" class="reference"><a href="#cite_note-EXR_file_layout-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p><p>OpenEXR's <a href="/wiki/Application_programming_interface" class="mw-redirect" title="Application programming interface">API</a> makes tools development a relative ease for developers. Since there are almost never two identical production pipelines, custom tools always need to be developed to address problems (e.g. image-manipulation issue). OpenEXR's library allows quick and easy access to the image's attributes such as tiles and channels.<sup id="cite_ref-EXR_file_layout_5-1" class="reference"><a href="#cite_note-EXR_file_layout-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p><p>The OpenEXR library is developed in <a href="/wiki/C%2B%2B" title="C++">C++</a> and is available in source format as well as compiled format for <a href="/wiki/Microsoft_Windows" title="Microsoft Windows">Microsoft Windows</a>, <a href="/wiki/MacOS" title="MacOS">macOS</a> and <a href="/wiki/Linux" title="Linux">Linux</a>. Python bindings for the library are also available for version 2.x.<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> <div class="mw-heading mw-heading3"><h3 id="History">History</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=OpenEXR&action=edit&section=2" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>OpenEXR was created by ILM in 1999 and released to the public in 2003 along with an <a href="/wiki/Open-source_license" title="Open-source license">open source</a> <a href="/wiki/Software_library" class="mw-redirect" title="Software library">software library</a>.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-OpenEXRdotCom_8-0" class="reference"><a href="#cite_note-OpenEXRdotCom-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> It soon received wide adoption by software used in <a href="/wiki/Computer_graphics" title="Computer graphics">computer graphics</a>, particularly for <a href="/wiki/Film_production" class="mw-redirect" title="Film production">film</a> and <a href="/wiki/Television_production" class="mw-redirect" title="Television production">television</a> production. The format has been updated several times, adding support for tiles, <a href="/wiki/Mipmaps" class="mw-redirect" title="Mipmaps">mipmaps</a>, new compression methods, and other features.<sup id="cite_ref-OpenEXRdotCom_8-1" class="reference"><a href="#cite_note-OpenEXRdotCom-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> In 2007, OpenEXR was honored with an <a href="/wiki/Academy_Award_for_Technical_Achievement" title="Academy Award for Technical Achievement">Academy Award for Technical Achievement</a>.<sup id="cite_ref-OpenEXRdotCom_8-2" class="reference"><a href="#cite_note-OpenEXRdotCom-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p><p>OpenEXR 2.0 was released in April 2013, extending the format with support for <a href="/wiki/Deep_image_compositing" title="Deep image compositing">deep image buffers</a> and multiple images embedded in a single file.<sup id="cite_ref-OpenEXRdotCom_8-3" class="reference"><a href="#cite_note-OpenEXRdotCom-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup><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><sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> Version 2.2, released August 2014, added the lossy DWA compression format.<sup id="cite_ref-OpenEXR_2.2_11-0" class="reference"><a href="#cite_note-OpenEXR_2.2-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Distribution">Distribution</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=OpenEXR&action=edit&section=3" title="Edit section: Distribution"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The OpenEXR software distribution includes: </p> <ul><li>libraries</li> <li>Half, a C++ class for manipulating half values as if they were a built-in C++ data type</li> <li>exrdisplay, a sample application for viewing OpenEXR images on a display at various exposure settings</li></ul> <div class="mw-heading mw-heading3"><h3 id="Libraries">Libraries</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=OpenEXR&action=edit&section=4" title="Edit section: Libraries"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced">IlmImf</span><sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> = library made by <a href="/wiki/Industrial_Light_%26_Magic" title="Industrial Light & Magic">Industrial Light & Magic</a> (Ilm) for low-level operations on the files with OpenEXR image format (Imf)<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced">libIlmImf</span> on linux</li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced">IlmImf.dll</span> on windows</li></ul></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced">IlmImfUtil</span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced">Imath</span><sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup></li></ul> <div class="mw-heading mw-heading2"><h2 id="Color_depth">Color depth</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=OpenEXR&action=edit&section=5" title="Edit section: Color depth"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>OpenEXR has support for <a href="/wiki/Color_depth" title="Color depth">color depth</a> using: </p> <ul><li>16-bit floating-point (half)</li> <li>32-bit floating-point</li> <li>32-bit unsigned integer</li></ul> <div class="mw-heading mw-heading2"><h2 id="Compression_methods">Compression methods</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=OpenEXR&action=edit&section=6" title="Edit section: Compression methods"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>There are three general types of lossless compression built into OpenEXR, with two different methods of Zip compressing. For most images without a lot of grain, the two Zip compression methods seem to work best, while the PIZ compression algorithm is better suited to grainy images. The following options are available:<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> </p> <dl><dt>None</dt> <dd>Disables all compression.</dd> <dt><a href="/wiki/Run-length_encoding" title="Run-length encoding">Run Length Encoding (RLE)</a></dt> <dd>This is a basic form of compression that is comparable to that used by standard <a href="/wiki/Truevision_TGA" title="Truevision TGA">Targa</a> files.</dd> <dt>Zip (per scanline)</dt> <dd><a href="/wiki/Deflate" title="Deflate">deflate</a> compression with <a href="/wiki/Zlib#Encapsulation" title="Zlib">zlib wrapper</a> applied to individual <a href="/wiki/Scanline" class="mw-redirect" title="Scanline">scanlines</a> (not based on the <a href="/wiki/ZIP_file_format" class="mw-redirect" title="ZIP file format">ZIP file format</a> despite its name).</dd> <dt>Zip (16 scanline blocks)</dt> <dd>deflate compression applied to blocks of 16 scanlines at time. This tends to be the most effective style of compression to use with rendered images that do not have film grain applied.</dd> <dt>PIZ (<a href="/wiki/Wavelet" title="Wavelet">wavelet</a> compression)</dt> <dd>This lossless method uses a new combined wavelet / <a href="/wiki/Huffman_coding" title="Huffman coding">Huffman</a> compression. This form of compression is quite effective when dealing with grainy images, and will often surpass any of the other options under grainy conditions.</dd> <dt>PXR24 (24-bit data conversion then deflate compression)</dt> <dd>This form of compression from <a href="/wiki/Pixar_Animation_Studios" class="mw-redirect" title="Pixar Animation Studios">Pixar Animation Studios</a> converts 32-bit floats to 24 bits then uses deflate compression. It is lossless for half and 32-bit integer data and slightly lossy for 32-bit float data.</dd> <dt>B44</dt> <dd>This form of compression is lossy for half data and stores 32-bit data uncompressed. It maintains a fixed compression size of either 2.28:1 or 4.57:1 and is designed for realtime playback. B44 compresses uniformly regardless of image content. <sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup></dd> <dt>B44A</dt> <dd>An extension to B44 where areas of flat color are further compressed, such as alpha channels.</dd> <dt>DWAA</dt> <dd>JPEG-like lossy compression format contributed by <a href="/wiki/DreamWorks_Animation" title="DreamWorks Animation">DreamWorks Animation</a>. Compresses 32 scanlines together.<sup id="cite_ref-OpenEXR_2.2_11-1" class="reference"><a href="#cite_note-OpenEXR_2.2-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup></dd> <dt>DWAB</dt> <dd>Same as DWAA, but compresses blocks of 256 scanlines.</dd></dl> <div class="mw-heading mw-heading2"><h2 id="Credits">Credits</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=OpenEXR&action=edit&section=7" title="Edit section: Credits"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>From OpenEXR.org's Technical Introduction: </p> <blockquote><p>The ILM OpenEXR file format was designed and implemented by Florian Kainz, Wojciech Jarosz, and Rod Bogart. The PIZ compression scheme is based on an algorithm by Christian Rouet. Josh Pines helped extend the PIZ algorithm for 16-bit and found optimizations for the float-to-half conversions. Drew Hess packaged and adapted ILM's internal source code for public release and maintains the OpenEXR software distribution. The PXR24 compression method is based on an algorithm written by Loren Carpenter at Pixar Animation Studios.<sup id="cite_ref-technical_introduction_4-2" class="reference"><a href="#cite_note-technical_introduction-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p></blockquote> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=OpenEXR&action=edit&section=8" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/High_dynamic_range" title="High dynamic range">High dynamic range</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=OpenEXR&action=edit&section=9" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.mbsplugins.eu/CGImageSourceSupportedTypes.shtml">"CGImageSource.SupportedTypes"</a>. <i>Claris FileMaker MBS Plug-in</i>. MonkeyBread Software.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Claris+FileMaker+MBS+Plug-in&rft.atitle=CGImageSource.SupportedTypes&rft_id=https%3A%2F%2Fwww.mbsplugins.eu%2FCGImageSourceSupportedTypes.shtml&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpenEXR" class="Z3988"></span></span> </li> <li id="cite_note-wikidata-155adc1875b20fe41176e9a0d6823dca3c393844-v18-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-wikidata-155adc1875b20fe41176e9a0d6823dca3c393844-v18_2-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.1">"Release v3.3.1 · AcademySoftwareFoundation/openexr"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">20 October</span> 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Release+v3.3.1+%C2%B7+AcademySoftwareFoundation%2Fopenexr&rft_id=https%3A%2F%2Fgithub.com%2FAcademySoftwareFoundation%2Fopenexr%2Freleases%2Ftag%2Fv3.3.1&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpenEXR" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.openexr.com/license.html">"License"</a>. <i>openexr.com</i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=openexr.com&rft.atitle=License&rft_id=http%3A%2F%2Fwww.openexr.com%2Flicense.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpenEXR" class="Z3988"></span></span> </li> <li id="cite_note-technical_introduction-4"><span class="mw-cite-backlink">^ <a href="#cite_ref-technical_introduction_4-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-technical_introduction_4-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-technical_introduction_4-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFFlorian_KainzRod_BogartPiotr_StanczykPeter_Hillman2013" class="citation web cs1">Florian Kainz; Rod Bogart; Piotr Stanczyk; Peter Hillman (5 November 2013). <a rel="nofollow" class="external text" href="https://www.openexr.com/documentation/TechnicalIntroduction.pdf">"Technical Introduction to OpenEXR"</a> <span class="cs1-format">(PDF)</span>. <a href="/wiki/Industrial_Light_%26_Magic" title="Industrial Light & Magic">Industrial Light & Magic</a><span class="reference-accessdate">. Retrieved <span class="nowrap">2015-11-09</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Technical+Introduction+to+OpenEXR&rft.pub=Industrial+Light+%26+Magic&rft.date=2013-11-05&rft.au=Florian+Kainz&rft.au=Rod+Bogart&rft.au=Piotr+Stanczyk&rft.au=Peter+Hillman&rft_id=https%3A%2F%2Fwww.openexr.com%2Fdocumentation%2FTechnicalIntroduction.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpenEXR" class="Z3988"></span></span> </li> <li id="cite_note-EXR_file_layout-5"><span class="mw-cite-backlink">^ <a href="#cite_ref-EXR_file_layout_5-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-EXR_file_layout_5-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://openexr.com/en/latest/OpenEXRFileLayout.html">"OpenEXR File Layout"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">25 May</span> 2023</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=OpenEXR+File+Layout&rft_id=https%3A%2F%2Fopenexr.com%2Fen%2Flatest%2FOpenEXRFileLayout.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpenEXR" class="Z3988"></span></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://pypi.python.org/pypi/OpenEXR">"OpenEXR 1.3.0 : Python Package Index"</a>. <i>pypi.python.org</i><span class="reference-accessdate">. Retrieved <span class="nowrap">11 April</span> 2018</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=pypi.python.org&rft.atitle=OpenEXR+1.3.0+%3A+Python+Package+Index&rft_id=https%3A%2F%2Fpypi.python.org%2Fpypi%2FOpenEXR&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpenEXR" class="Z3988"></span></span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation pressrelease cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20170721234341/http://www.openexr.com/OpenEXR_Press_Release_1_22_03.pdf">"Industrial Light & Magic Releases Proprietary Extended Dynamic Range Image File Format OpenEXR to Open Source Community"</a> <span class="cs1-format">(PDF)</span> (Press release). 22 January 2003. Archived from <a rel="nofollow" class="external text" href="http://www.openexr.com/OpenEXR_Press_Release_1_22_03.pdf">the original</a> <span class="cs1-format">(PDF)</span> on 21 July 2017<span class="reference-accessdate">. Retrieved <span class="nowrap">11 April</span> 2013</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Industrial+Light+%26+Magic+Releases+Proprietary+Extended+Dynamic+Range+Image+File+Format+OpenEXR+to+Open+Source+Community&rft.date=2003-01-22&rft_id=http%3A%2F%2Fwww.openexr.com%2FOpenEXR_Press_Release_1_22_03.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpenEXR" class="Z3988"></span></span> </li> <li id="cite_note-OpenEXRdotCom-8"><span class="mw-cite-backlink">^ <a href="#cite_ref-OpenEXRdotCom_8-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-OpenEXRdotCom_8-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-OpenEXRdotCom_8-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-OpenEXRdotCom_8-3"><sup><i><b>d</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://github.com/AcademySoftwareFoundation/openexr">"OpenEXR"</a>. January 16, 2023 – via GitHub.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=OpenEXR&rft.date=2023-01-16&rft_id=https%3A%2F%2Fgithub.com%2FAcademySoftwareFoundation%2Fopenexr&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpenEXR" class="Z3988"></span></span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFStanczyk2013" class="citation mailinglist cs1">Stanczyk, Piotr (9 April 2013). <a rel="nofollow" class="external text" href="https://lists.nongnu.org/archive/html/openexr-announce/2013-04/msg00000.html">"v2.0.0.0 (GM) release announcement"</a>. <i>openexr-announce</i> (Mailing list).</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=v2.0.0.0+%28GM%29+release+announcement&rft.date=2013-04-09&rft.aulast=Stanczyk&rft.aufirst=Piotr&rft_id=https%3A%2F%2Flists.nongnu.org%2Farchive%2Fhtml%2Fopenexr-announce%2F2013-04%2Fmsg00000.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpenEXR" class="Z3988"></span></span> </li> <li id="cite_note-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-10">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.cgsociety.org/index.php/CGSFeatures/CGSFeatureSpecial/openexr_2.0">"OpenEXR 2.0"</a>. <i>The CGSoceity</i>. 10 April 2013.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=The+CGSoceity&rft.atitle=OpenEXR+2.0&rft.date=2013-04-10&rft_id=http%3A%2F%2Fwww.cgsociety.org%2Findex.php%2FCGSFeatures%2FCGSFeatureSpecial%2Fopenexr_2.0&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpenEXR" class="Z3988"></span></span> </li> <li id="cite_note-OpenEXR_2.2-11"><span class="mw-cite-backlink">^ <a href="#cite_ref-OpenEXR_2.2_11-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-OpenEXR_2.2_11-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation pressrelease cs1"><a rel="nofollow" class="external text" href="https://www.renderosity.com/dreamworks-animation-contributes-lossy-compression-to-openexr-2-2-cms-17221">"DreamWorks Animation Contributes Lossy Compression To OpenEXR 2.2"</a> (Press release). Glendale, CA. 8 August 2014<span class="reference-accessdate">. Retrieved <span class="nowrap">2014-08-18</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=DreamWorks+Animation+Contributes+Lossy+Compression+To+OpenEXR+2.2&rft.place=Glendale%2C+CA&rft.date=2014-08-08&rft_id=https%3A%2F%2Fwww.renderosity.com%2Fdreamworks-animation-contributes-lossy-compression-to-openexr-2-2-cms-17221&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpenEXR" class="Z3988"></span></span> </li> <li id="cite_note-12"><span class="mw-cite-backlink"><b><a href="#cite_ref-12">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.openexr.com/documentation/ReadingAndWritingImageFiles.pdf">"Reading and Writing OpenEXR Image Files with the IlmImf Library"</a> <span class="cs1-format">(PDF)</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Reading+and+Writing+OpenEXR+Image+Files+with+the+IlmImf+Library&rft_id=https%3A%2F%2Fwww.openexr.com%2Fdocumentation%2FReadingAndWritingImageFiles.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpenEXR" class="Z3988"></span></span> </li> <li id="cite_note-13"><span class="mw-cite-backlink"><b><a href="#cite_ref-13">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://github.com/AcademySoftwareFoundation/openexr/issues/879">"name · Issue #879 · AcademySoftwareFoundation/openexr"</a>. <i>GitHub</i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=GitHub&rft.atitle=name+%C2%B7+Issue+%23879+%C2%B7+AcademySoftwareFoundation%2Fopenexr&rft_id=https%3A%2F%2Fgithub.com%2FAcademySoftwareFoundation%2Fopenexr%2Fissues%2F879&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpenEXR" class="Z3988"></span></span> </li> <li id="cite_note-14"><span class="mw-cite-backlink"><b><a href="#cite_ref-14">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://github.com/AcademySoftwareFoundation/Imath">"Imath"</a>. January 21, 2023 – via GitHub.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Imath&rft.date=2023-01-21&rft_id=https%3A%2F%2Fgithub.com%2FAcademySoftwareFoundation%2FImath&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpenEXR" class="Z3988"></span></span> </li> <li id="cite_note-15"><span class="mw-cite-backlink"><b><a href="#cite_ref-15">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20110717152538/http://www.openexr.com/TechnicalIntroduction.pdf#%5B%7B%22num%22%3A47%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2C69%2C437%2C0%5D">"Technical Introduction to OpenEXR"</a> <span class="cs1-format">(PDF)</span>. Archived from <a rel="nofollow" class="external text" href="http://www.openexr.com/TechnicalIntroduction.pdf#%5B%7B%22num%22%3A47%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2C69%2C437%2C0%5D">the original</a> <span class="cs1-format">(PDF)</span> on 2011-07-17<span class="reference-accessdate">. Retrieved <span class="nowrap">2006-02-23</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Technical+Introduction+to+OpenEXR&rft_id=http%3A%2F%2Fwww.openexr.com%2FTechnicalIntroduction.pdf%23%255B%257B%2522num%2522%253A47%252C%2522gen%2522%253A0%257D%252C%257B%2522name%2522%253A%2522XYZ%2522%257D%252C69%252C437%252C0%255D&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpenEXR" class="Z3988"></span></span> </li> <li id="cite_note-16"><span class="mw-cite-backlink"><b><a href="#cite_ref-16">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20110717152538/http://www.openexr.com/TechnicalIntroduction.pdf">"Technical Introduction to OpenEXR"</a> <span class="cs1-format">(PDF)</span>. Archived from <a rel="nofollow" class="external text" href="http://www.openexr.com/TechnicalIntroduction.pdf">the original</a> <span class="cs1-format">(PDF)</span> on 2011-07-17<span class="reference-accessdate">. Retrieved <span class="nowrap">2006-02-23</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Technical+Introduction+to+OpenEXR&rft_id=http%3A%2F%2Fwww.openexr.com%2FTechnicalIntroduction.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpenEXR" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=OpenEXR&action=edit&section=10" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><span class="official-website"><span class="url"><a rel="nofollow" class="external text" href="https://www.openexr.com/">Official website</a></span></span> <span class="mw-valign-text-top" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q1341482#P856" title="Edit this at 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<li><a href="/wiki/ANIM" title="ANIM">ANIM</a></li> <li><a href="/wiki/APNG" title="APNG">APNG</a></li> <li><a href="/wiki/ART_image_file_format" title="ART image file format"> ART</a></li> <li><a href="/wiki/AVIF" title="AVIF">AVIF</a></li> <li><a href="/wiki/BMP_file_format" title="BMP file format"> BMP</a></li> <li><a href="/wiki/Better_Portable_Graphics" title="Better Portable Graphics"> BPG</a></li> <li><a href="/wiki/BSAVE" title="BSAVE"> BSAVE</a></li> <li><a href="/wiki/CALS_Raster_file_format" title="CALS Raster file format"> CAL</a></li> <li><a href="/wiki/Cineon" title="Cineon"> CIN</a></li> <li><a href="/wiki/Cartesian_Perceptual_Compression" title="Cartesian Perceptual Compression"> CPC</a></li> <li><a href="/wiki/CPT_(file_format)" title="CPT (file format)"> CPT</a></li> <li><a href="/wiki/DirectDraw_Surface" title="DirectDraw Surface"> DDS</a></li> <li><a href="/wiki/Digital_Picture_Exchange" title="Digital Picture Exchange"> DPX</a></li> <li><a href="/wiki/ECW_(file_format)" title="ECW (file format)"> ECW</a></li> <li><a class="mw-selflink selflink"> EXR</a></li> <li><a href="/wiki/FITS" title="FITS">FITS</a></li> <li><a href="/wiki/FLIC_(file_format)" title="FLIC (file format)"> FLIC</a></li> <li><a href="/wiki/Free_Lossless_Image_Format" title="Free Lossless Image Format"> FLIF</a></li> <li><a href="/wiki/FlashPix" title="FlashPix"> FPX</a></li> <li><a href="/wiki/GIF" title="GIF">GIF</a></li> <li><a href="/wiki/HDRi_(data_format)" class="mw-redirect" title="HDRi (data format)"> HDRi</a></li> <li><a href="/wiki/High_Efficiency_Video_Coding#Main_Still_Picture" title="High Efficiency Video Coding"> HEVC</a></li> <li><a href="/wiki/ICER_(file_format)" title="ICER (file format)">ICER</a></li> <li><a href="/wiki/Apple_Icon_Image_format" title="Apple Icon Image format"> ICNS</a></li> <li><a href="/wiki/ICO_(file_format)" title="ICO (file format)"> ICO / CUR</a></li> <li><a href="/wiki/Image_Cytometry_Standard" title="Image Cytometry Standard"> ICS</a></li> <li><a href="/wiki/ILBM" title="ILBM">ILBM</a></li> <li><a href="/wiki/JBIG" title="JBIG">JBIG</a></li> <li><a href="/wiki/JBIG2" title="JBIG2">JBIG2</a></li> <li><a href="/wiki/JPEG_Network_Graphics" title="JPEG Network Graphics"> JNG</a></li> <li><a href="/wiki/JPEG" title="JPEG">JPEG</a></li> <li><a href="/wiki/Lossless_JPEG#JPEG-LS" title="Lossless JPEG"> JPEG-LS</a></li> <li><a href="/wiki/JPEG_2000" title="JPEG 2000">JPEG 2000</a></li> <li><a href="/wiki/JPEG_XL" title="JPEG XL">JPEG XL</a></li> <li><a href="/wiki/JPEG_XR" title="JPEG XR">JPEG XR</a></li> <li><a href="/wiki/JPEG_XS" title="JPEG XS">JPEG XS</a></li> <li><a href="/wiki/JPEG_XT" title="JPEG XT">JPEG XT</a> <ul><li><a href="/wiki/JPEG-HDR" class="mw-redirect" title="JPEG-HDR">JPEG-HDR</a></li></ul></li> <li><a href="/wiki/Krita" title="Krita"> KRA</a></li> <li><a href="/wiki/Multiple-image_Network_Graphics" title="Multiple-image Network Graphics"> MNG</a></li> <li><a href="/wiki/Magick_Image_File_Format" title="Magick Image File Format"> MIFF</a></li> <li><a href="/wiki/Nearly_raw_raster_data" class="mw-redirect" title="Nearly raw raster data"> NRRD</a></li> <li><a href="/wiki/OpenRaster" title="OpenRaster"> ORA</a></li> <li><a href="/wiki/Netpbm#PAM_graphics_format" title="Netpbm"> PAM</a></li> <li><a href="/wiki/Netpbm" title="Netpbm"> PBM / PGM / PPM / PNM</a></li> <li><a href="/wiki/PCX" title="PCX">PCX</a></li> <li><a href="/wiki/Progressive_Graphics_File" title="Progressive Graphics File"> PGF</a></li> <li><a href="/wiki/PICtor_PIC_image_format" title="PICtor PIC image format"> PICtor</a></li> <li><a href="/wiki/PNG" title="PNG">PNG</a></li> <li><a href="/wiki/Adobe_Photoshop#PSD" title="Adobe Photoshop"> PSD / PSB</a></li> <li><a href="/wiki/PaintShop_Pro" title="PaintShop Pro"> PSP</a></li> <li><a href="/wiki/QOI_(image_format)" title="QOI (image format)"> QOI</a></li> <li><a href="/wiki/QuickTime_VR" title="QuickTime VR"> QTVR</a></li> <li><a href="/wiki/Sun_Raster" title="Sun Raster"> RAS</a></li> <li><a href="/wiki/RGBE_image_format" title="RGBE image format"> RGBE</a> <ul><li><a href="/wiki/Logluv_TIFF" title="Logluv TIFF">Logluv TIFF</a></li></ul></li> <li><a href="/wiki/Silicon_Graphics_Image" title="Silicon Graphics Image"> SGI</a></li> <li><a href="/wiki/Truevision_TGA" title="Truevision TGA"> TGA</a></li> <li><a href="/wiki/Tag_Image_File_Format" class="mw-redirect" title="Tag Image File Format"> TIFF</a> <ul><li><a href="/wiki/TIFF/EP" title="TIFF/EP">TIFF/EP</a></li> <li><a href="/wiki/Tag_Image_File_Format#TIFF/IT" class="mw-redirect" title="Tag Image File Format"> TIFF/IT</a></li></ul></li> <li><a href="/wiki/Ulead_PhotoImpact" title="Ulead PhotoImpact"> UFO / UFP</a></li> <li><a href="/wiki/Wireless_Application_Protocol_Bitmap_Format" title="Wireless Application Protocol Bitmap Format"> WBMP</a></li> <li><a href="/wiki/WebP" title="WebP">WebP</a></li> <li><a href="/wiki/X_BitMap" title="X BitMap"> XBM</a></li> <li><a href="/wiki/XCF_(file_format)" title="XCF (file format)"> XCF</a></li> <li><a href="/wiki/X_PixMap" title="X PixMap"> XPM</a></li> <li><a href="/wiki/Xwd" title="Xwd"> XWD</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Raw_image_format" title="Raw image format">Raw</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Camera_Image_File_Format" title="Camera Image File Format"> CIFF</a></li> <li><a href="/wiki/Digital_Negative" title="Digital Negative"> DNG</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Vector_graphics" title="Vector graphics">Vector</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Adobe_Illustrator_Artwork" class="mw-redirect" title="Adobe Illustrator Artwork"> AI</a></li> <li><a href="/wiki/CorelDRAW#CDR_file_format" title="CorelDRAW"> CDR</a></li> <li><a href="/wiki/Computer_Graphics_Metafile" title="Computer Graphics Metafile"> CGM</a></li> <li><a href="/wiki/AutoCAD_DXF" title="AutoCAD DXF"> DXF</a></li> <li><a href="/wiki/Enhanced_Metafile" class="mw-redirect" title="Enhanced Metafile"> EMF</a></li> <li><a href="/wiki/EMF%2B" class="mw-redirect" title="EMF+">EMF+</a></li> <li><a href="/wiki/Gerber_format" title="Gerber format"> Gerber</a></li> <li><a href="/wiki/Haiku_Vector_Icon_Format" class="mw-redirect" title="Haiku Vector Icon Format"> HVIF</a></li> <li><a href="/wiki/IGES" title="IGES">IGES</a></li> <li><a href="/wiki/Precision_Graphics_Markup_Language" title="Precision Graphics Markup Language"> PGML</a></li> <li><a href="/wiki/Scalable_Vector_Graphics" class="mw-redirect" title="Scalable Vector Graphics"> SVG</a></li> <li><a href="/wiki/Vector_Markup_Language" title="Vector Markup Language"> VML</a></li> <li><a href="/wiki/Windows_Metafile" title="Windows Metafile"> WMF</a></li> <li><a href="/wiki/Xar_(graphics)" title="Xar (graphics)"> Xar</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Image_file_format#Compound_formats" title="Image file format">Compound</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Computable_Document_Format" title="Computable Document Format"> CDF</a></li> <li><a href="/wiki/DjVu" title="DjVu">DjVu</a></li> <li><a href="/wiki/Encapsulated_PostScript" title="Encapsulated PostScript"> EPS</a></li> <li><a href="/wiki/MODCA" title="MODCA">MODCA</a></li> <li><a href="/wiki/PDF" title="PDF">PDF</a></li> <li><a href="/wiki/PICT" title="PICT">PICT</a></li> <li><a href="/wiki/PostScript" title="PostScript"> PS</a></li> <li><a href="/wiki/SWF" title="SWF">SWF</a></li> <li><a href="/wiki/Extensible_Application_Markup_Language" title="Extensible Application Markup Language"> XAML</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Metadata" title="Metadata">Metadata</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Exif" title="Exif">Exchangeable image file format (Exif)</a></li> <li><a href="/wiki/International_Press_Telecommunications_Council#Photo_metadata" title="International Press Telecommunications Council">International Press Telecommunications Council § Photo metadata</a></li> <li><a href="/wiki/Extensible_Metadata_Platform" title="Extensible Metadata Platform">Extensible Metadata Platform (XMP)</a></li> <li><a href="/wiki/GIF#Metadata" title="GIF">GIF § Metadata</a></li> <li><a href="/wiki/Steganography" title="Steganography">Steganography</a></li></ul> </div></td></tr><tr><td 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