YIQ - Wikipedia

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data-event-name="pinnable-header.vector-toc.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">hide</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">(Top)</div> </a> </li> <li id="toc-Image_processing" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Image_processing"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Image processing</span> </div> </a> <ul id="toc-Image_processing-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Formulas" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Formulas"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Formulas</span> </div> </a> <button aria-controls="toc-Formulas-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>Toggle Formulas subsection</span> </button> <ul id="toc-Formulas-sublist" class="vector-toc-list"> <li id="toc-NTSC_1953_colorimetry" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#NTSC_1953_colorimetry"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>NTSC 1953 colorimetry</span> </div> </a> <ul id="toc-NTSC_1953_colorimetry-sublist" class="vector-toc-list"> <li id="toc-From_RGB_to_YIQ" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#From_RGB_to_YIQ"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1.1</span> <span>From RGB to YIQ</span> </div> </a> <ul id="toc-From_RGB_to_YIQ-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-From_YIQ_to_RGB" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#From_YIQ_to_RGB"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1.2</span> <span>From YIQ to RGB</span> </div> </a> <ul id="toc-From_YIQ_to_RGB-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-FCC_NTSC_Standard_(SMPTE_C)" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#FCC_NTSC_Standard_(SMPTE_C)"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2</span> <span>FCC NTSC Standard (SMPTE C)</span> </div> </a> <ul id="toc-FCC_NTSC_Standard_(SMPTE_C)-sublist" class="vector-toc-list"> <li id="toc-From_RGB_to_YIQ_2" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#From_RGB_to_YIQ_2"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2.1</span> <span>From RGB to YIQ</span> </div> </a> <ul id="toc-From_RGB_to_YIQ_2-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-From_YIQ_to_RGB_2" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#From_YIQ_to_RGB_2"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2.2</span> <span>From YIQ to RGB</span> </div> </a> <ul id="toc-From_YIQ_to_RGB_2-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-From_YUV_to_YIQ_and_vice_versa" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#From_YUV_to_YIQ_and_vice_versa"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2.3</span> <span>From YUV to YIQ and vice versa</span> </div> </a> <ul id="toc-From_YUV_to_YIQ_and_vice_versa-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> </ul> </li> <li id="toc-Phase-out" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Phase-out"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Phase-out</span> </div> </a> <ul id="toc-Phase-out-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Further_reading" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Further_reading"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Further reading</span> </div> </a> <ul id="toc-Further_reading-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="Contents" class="vector-toc-landmark"> <div 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class="mw-page-title-main">YIQ</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="Go to an article in another language. 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German" lang="de" hreflang="de" data-title="YIQ-Farbmodell" 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/YIQ" title="YIQ – Spanish" lang="es" hreflang="es" data-title="YIQ" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/YIQ" title="YIQ – French" lang="fr" hreflang="fr" data-title="YIQ" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/YIQ" title="YIQ – Dutch" lang="nl" hreflang="nl" data-title="YIQ" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/YIQ" title="YIQ – Polish" lang="pl" hreflang="pl" data-title="YIQ" 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/YIQ" title="YIQ – Russian" lang="ru" hreflang="ru" data-title="YIQ" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/YIQ_(f%C3%A4rgrymd)" title="YIQ (färgrymd) – Swedish" lang="sv" hreflang="sv" data-title="YIQ (färgrymd)" data-language-autonym="Svenska" data-language-local-name="Swedish" 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class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Color space</div> <figure typeof="mw:File/Thumb"><a href="/wiki/File:YIQ_IQ_plane.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/82/YIQ_IQ_plane.svg/300px-YIQ_IQ_plane.svg.png" decoding="async" width="300" height="300" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/82/YIQ_IQ_plane.svg/450px-YIQ_IQ_plane.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/82/YIQ_IQ_plane.svg/600px-YIQ_IQ_plane.svg.png 2x" data-file-width="600" data-file-height="600" /></a><figcaption>The YIQ color space at Y=0.5. Note that the I and Q chroma coordinates are scaled up to 1.0. See the formulae below in the article to get the right bounds.</figcaption></figure> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:YIQ_components.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/0/01/YIQ_components.jpg/220px-YIQ_components.jpg" decoding="async" width="220" height="657" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/01/YIQ_components.jpg/330px-YIQ_components.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/01/YIQ_components.jpg/440px-YIQ_components.jpg 2x" data-file-width="1600" data-file-height="4780" /></a><figcaption>An image along with its Y, I, and Q components</figcaption></figure> <p><b>YIQ</b> is the <a href="/wiki/Color_space" title="Color space">color space</a> used by the analog <a href="/wiki/NTSC" title="NTSC">NTSC</a> color TV system. <i>I</i> stands for <i>in-phase</i>, while <i>Q</i> stands for <i>quadrature</i>, referring to the components used in <a href="/wiki/Quadrature_amplitude_modulation" title="Quadrature amplitude modulation">quadrature amplitude modulation</a>. Other TV systems used different color spaces, such as <a href="/wiki/Y%E2%80%B2UV" title="Y′UV">YUV</a> for <a href="/wiki/PAL" title="PAL">PAL</a> or <a href="/wiki/YDbDr" title="YDbDr">YDbDr</a> for SECAM. Later <a href="/wiki/Digital_television" title="Digital television">digital standards</a> use the <a href="/wiki/YCbCr" title="YCbCr">YCbCr</a> color space. These color spaces are all broadly related, and work based on the principle of adding a color component named <i><a href="/wiki/Chrominance" title="Chrominance">chrominance</a></i>, to a black and white image named <i><a href="/wiki/Luma_(video)" title="Luma (video)">luma</a></i>. </p><p>In YIQ the <b>Y</b> component represents the luma information, and is the only component used by black-and-white television receivers. <b>I</b> and <b>Q</b> represent the chrominance information, with I indicating (roughly) <a href="/wiki/Orange_(colour)" title="Orange (colour)">orange</a>-<a href="/wiki/Blue" title="Blue">blue</a> contrast, and Q indicating <a href="/wiki/Purple" title="Purple">purple</a>-<a href="/wiki/Green" title="Green">green</a> contrast. I and Q can be thought of as a second pair of axes on the same graph as the YUV color space, rotated 33°; therefore IQ and UV represent different coordinate systems on the same plane. </p><p>The YIQ system is intended to take advantage of <a href="/wiki/Color_vision" title="Color vision">human color-response</a> characteristics. The eye is more sensitive to changes in the orange-blue (I) range than in the purple-green range (Q)—therefore less <a href="/wiki/Bandwidth_(signal_processing)" title="Bandwidth (signal processing)">bandwidth</a> is required for Q than for I. <a href="/wiki/CCIR_System_M" title="CCIR System M">Broadcast NTSC</a> limits I to 1.3 MHz and Q to 0.4 MHz. I and Q are frequency interleaved into the 4 MHz Y signal, which keeps the bandwidth of the overall signal down to 4.2 MHz. In YUV systems, since U and V both contain information in the orange-blue range, both components must be given the same amount of bandwidth as I to achieve similar color fidelity. </p><p>Very few television sets perform true I and Q decoding, due to the high costs of such an implementation. Compared to the cheaper R-Y and B-Y decoding which requires only one filter, I and Q each requires a different filter to satisfy the bandwidth differences between I and Q. These bandwidth differences also require that the 'I' filter include a time delay to match the longer delay of the 'Q' filter. The <a href="/wiki/Rockwell_Collins" title="Rockwell Collins">Rockwell</a> Modular Digital Radio (MDR) was one I and Q decoding set, which in 1997 could operate in frame-at-a-time mode with a PC or in realtime with the Fast IQ Processor (FIQP). Some <a href="/wiki/RCA" title="RCA">RCA</a> "<a href="/wiki/Colortrak" title="Colortrak">Colortrak</a>" home TV receivers made circa 1985 not only used I/Q decoding, but also advertised its benefits along with its <a href="/wiki/Comb_filter" title="Comb filter">comb filtering</a> benefits as full "100 percent processing" to deliver more of the original color picture content. Earlier, more than one brand of color TV (RCA, Arvin) used I/Q decoding in the 1954 or 1955 model year on models utilizing screens about 13 inches (measured diagonally). The original <a href="/wiki/Henry_Kloss#Advent_Corporation" title="Henry Kloss">Advent</a> projection television used I/Q decoding. Around 1990, at least one manufacturer (<a href="/wiki/Ikegami_Tsushinki" title="Ikegami Tsushinki">Ikegami</a>) of professional studio picture monitors advertised I/Q decoding. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Image_processing">Image processing</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=YIQ&action=edit&section=1" title="Edit section: Image processing"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The YIQ representation is sometimes employed in color <a href="/wiki/Digital_image_processing" title="Digital image processing">image processing</a> transformations. For example, applying a <a href="/wiki/Histogram_equalization" title="Histogram equalization">histogram equalization</a> directly to the channels in an RGB image would alter the <a href="/wiki/Color_balance" title="Color balance">color balance</a> of the image. Instead, the histogram equalization is applied to the Y channel of the YIQ or YUV representation of the image, which only normalizes the brightness levels of the image. </p> <div class="mw-heading mw-heading2"><h2 id="Formulas">Formulas</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=YIQ&action=edit&section=2" title="Edit section: Formulas"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>These formulas allow conversion between YIQ and RGB color spaces, where R, G, and B are gamma-corrected values. Values for the original 1953 NTSC colorimetry and later SMPTE C FCC standard. </p><p>The following formulas assume: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle R,G,B,Y\in \left[0,1\right],\quad I\in \left[-0.5957,0.5957\right],\quad Q\in \left[-0.5226,0.5226\right]}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>R</mi> <mo>,</mo> <mi>G</mi> <mo>,</mo> <mi>B</mi> <mo>,</mo> <mi>Y</mi> <mo>∈</mo> <mrow> <mo>[</mo> <mrow> <mn>0</mn> <mo>,</mo> <mn>1</mn> </mrow> <mo>]</mo> </mrow> <mo>,</mo> <mspace width="1em" /> <mi>I</mi> <mo>∈</mo> <mrow> <mo>[</mo> <mrow> <mo>−</mo> <mn>0.5957</mn> <mo>,</mo> <mn>0.5957</mn> </mrow> <mo>]</mo> </mrow> <mo>,</mo> <mspace width="1em" /> <mi>Q</mi> <mo>∈</mo> <mrow> <mo>[</mo> <mrow> <mo>−</mo> <mn>0.5226</mn> <mo>,</mo> <mn>0.5226</mn> </mrow> <mo>]</mo> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle R,G,B,Y\in \left[0,1\right],\quad I\in \left[-0.5957,0.5957\right],\quad Q\in \left[-0.5226,0.5226\right]}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/fc8d517bbc7dcd11edba6efc38f84f91dc27a990" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:68.01ex; height:2.843ex;" alt="{\displaystyle R,G,B,Y\in \left[0,1\right],\quad I\in \left[-0.5957,0.5957\right],\quad Q\in \left[-0.5226,0.5226\right]}"></span></dd></dl> <p>The ranges for I and Q<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> are a result of the coefficients in the 2nd and 3rd rows of the RGB-to-YIQ equation matrix below, respectively. </p> <div class="mw-heading mw-heading3"><h3 id="NTSC_1953_colorimetry">NTSC 1953 colorimetry</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=YIQ&action=edit&section=3" title="Edit section: NTSC 1953 colorimetry"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:NTSC_1953_RGB_Colorcube.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f8/NTSC_1953_RGB_Colorcube.png/220px-NTSC_1953_RGB_Colorcube.png" decoding="async" width="220" height="220" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f8/NTSC_1953_RGB_Colorcube.png/330px-NTSC_1953_RGB_Colorcube.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f8/NTSC_1953_RGB_Colorcube.png/440px-NTSC_1953_RGB_Colorcube.png 2x" data-file-width="1024" data-file-height="1024" /></a><figcaption>NTSC 1953 colorimetry color cube (color profile encoded, requires a compatible browser and monitor for accurate display).</figcaption></figure> <p>These formulas approximate the conversion between the <a href="/wiki/NTSC#Colorimetry" title="NTSC">original 1953 color NTSC specification</a> and YIQ.<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><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> </p> <div class="mw-heading mw-heading4"><h4 id="From_RGB_to_YIQ">From RGB to YIQ</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=YIQ&action=edit&section=4" title="Edit section: From RGB to YIQ"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\begin{bmatrix}Y\\I\\Q\end{bmatrix}}\approx {\begin{bmatrix}0.299&0.587&0.114\\0.5959&-0.2746&-0.3213\\0.2115&-0.5227&0.3112\end{bmatrix}}{\begin{bmatrix}R\\G\\B\end{bmatrix}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mrow> <mo>[</mo> <mtable rowspacing="4pt" columnspacing="1em"> <mtr> <mtd> <mi>Y</mi> </mtd> </mtr> <mtr> <mtd> <mi>I</mi> </mtd> </mtr> <mtr> <mtd> <mi>Q</mi> </mtd> </mtr> </mtable> <mo>]</mo> </mrow> </mrow> <mo>≈</mo> <mrow class="MJX-TeXAtom-ORD"> <mrow> <mo>[</mo> <mtable rowspacing="4pt" columnspacing="1em"> <mtr> <mtd> <mn>0.299</mn> </mtd> <mtd> <mn>0.587</mn> </mtd> <mtd> <mn>0.114</mn> </mtd> </mtr> <mtr> <mtd> <mn>0.5959</mn> </mtd> <mtd> <mo>−</mo> <mn>0.2746</mn> </mtd> <mtd> <mo>−</mo> <mn>0.3213</mn> </mtd> </mtr> <mtr> <mtd> <mn>0.2115</mn> </mtd> <mtd> <mo>−</mo> <mn>0.5227</mn> </mtd> <mtd> <mn>0.3112</mn> </mtd> </mtr> </mtable> <mo>]</mo> </mrow> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mrow> <mo>[</mo> <mtable rowspacing="4pt" columnspacing="1em"> <mtr> <mtd> <mi>R</mi> </mtd> </mtr> <mtr> <mtd> <mi>G</mi> </mtd> </mtr> <mtr> <mtd> <mi>B</mi> </mtd> </mtr> </mtable> <mo>]</mo> </mrow> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\begin{bmatrix}Y\\I\\Q\end{bmatrix}}\approx {\begin{bmatrix}0.299&0.587&0.114\\0.5959&-0.2746&-0.3213\\0.2115&-0.5227&0.3112\end{bmatrix}}{\begin{bmatrix}R\\G\\B\end{bmatrix}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/fcdfdebe09590e617de9e523514a79f506086a74" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -4.005ex; width:45.959ex; height:9.176ex;" alt="{\displaystyle {\begin{bmatrix}Y\\I\\Q\end{bmatrix}}\approx {\begin{bmatrix}0.299&0.587&0.114\\0.5959&-0.2746&-0.3213\\0.2115&-0.5227&0.3112\end{bmatrix}}{\begin{bmatrix}R\\G\\B\end{bmatrix}}}"></span> <sup id="cite_ref-ITU-R-BT1700_6-0" class="reference"><a href="#cite_note-ITU-R-BT1700-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup></dd></dl> <div class="mw-heading mw-heading4"><h4 id="From_YIQ_to_RGB">From YIQ to RGB</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=YIQ&action=edit&section=5" title="Edit section: From YIQ to RGB"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\begin{bmatrix}R\\G\\B\end{bmatrix}}={\begin{bmatrix}1&0.956&0.619\\1&-0.272&-0.647\\1&-1.106&1.703\end{bmatrix}}{\begin{bmatrix}Y\\I\\Q\end{bmatrix}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mrow> <mo>[</mo> <mtable rowspacing="4pt" columnspacing="1em"> <mtr> <mtd> <mi>R</mi> </mtd> </mtr> <mtr> <mtd> <mi>G</mi> </mtd> </mtr> <mtr> <mtd> <mi>B</mi> </mtd> </mtr> </mtable> <mo>]</mo> </mrow> </mrow> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mrow> <mo>[</mo> <mtable rowspacing="4pt" columnspacing="1em"> <mtr> <mtd> <mn>1</mn> </mtd> <mtd> <mn>0.956</mn> </mtd> <mtd> <mn>0.619</mn> </mtd> </mtr> <mtr> <mtd> <mn>1</mn> </mtd> <mtd> <mo>−</mo> <mn>0.272</mn> </mtd> <mtd> <mo>−</mo> <mn>0.647</mn> </mtd> </mtr> <mtr> <mtd> <mn>1</mn> </mtd> <mtd> <mo>−</mo> <mn>1.106</mn> </mtd> <mtd> <mn>1.703</mn> </mtd> </mtr> </mtable> <mo>]</mo> </mrow> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mrow> <mo>[</mo> <mtable rowspacing="4pt" columnspacing="1em"> <mtr> <mtd> <mi>Y</mi> </mtd> </mtr> <mtr> <mtd> <mi>I</mi> </mtd> </mtr> <mtr> <mtd> <mi>Q</mi> </mtd> </mtr> </mtable> <mo>]</mo> </mrow> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\begin{bmatrix}R\\G\\B\end{bmatrix}}={\begin{bmatrix}1&0.956&0.619\\1&-0.272&-0.647\\1&-1.106&1.703\end{bmatrix}}{\begin{bmatrix}Y\\I\\Q\end{bmatrix}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/ed5aab30cdaaee8a918a99718a119817c5c01f6f" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -4.005ex; width:38.337ex; height:9.176ex;" alt="{\displaystyle {\begin{bmatrix}R\\G\\B\end{bmatrix}}={\begin{bmatrix}1&0.956&0.619\\1&-0.272&-0.647\\1&-1.106&1.703\end{bmatrix}}{\begin{bmatrix}Y\\I\\Q\end{bmatrix}}}"></span></dd></dl> <p>Note that the top row is identical to that of the <a href="/wiki/YUV" class="mw-redirect" title="YUV">YUV</a> color space </p> <ul><li><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\begin{bmatrix}R\\G\\B\end{bmatrix}}={\begin{bmatrix}1\\1\\1\end{bmatrix}}\implies {\begin{bmatrix}Y\\I\\Q\end{bmatrix}}={\begin{bmatrix}1\\0\\0\end{bmatrix}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mrow> <mo>[</mo> <mtable rowspacing="4pt" columnspacing="1em"> <mtr> <mtd> <mi>R</mi> </mtd> </mtr> <mtr> <mtd> <mi>G</mi> </mtd> </mtr> <mtr> <mtd> <mi>B</mi> </mtd> </mtr> </mtable> <mo>]</mo> </mrow> </mrow> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mrow> <mo>[</mo> <mtable rowspacing="4pt" columnspacing="1em"> <mtr> <mtd> <mn>1</mn> </mtd> </mtr> <mtr> <mtd> <mn>1</mn> </mtd> </mtr> <mtr> <mtd> <mn>1</mn> </mtd> </mtr> </mtable> <mo>]</mo> </mrow> </mrow> <mspace width="thickmathspace" /> <mo stretchy="false">⟹</mo> <mspace width="thickmathspace" /> <mrow class="MJX-TeXAtom-ORD"> <mrow> <mo>[</mo> <mtable rowspacing="4pt" columnspacing="1em"> <mtr> <mtd> <mi>Y</mi> </mtd> </mtr> <mtr> <mtd> <mi>I</mi> </mtd> </mtr> <mtr> <mtd> <mi>Q</mi> </mtd> </mtr> </mtable> <mo>]</mo> </mrow> </mrow> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mrow> <mo>[</mo> <mtable rowspacing="4pt" columnspacing="1em"> <mtr> <mtd> <mn>1</mn> </mtd> </mtr> <mtr> <mtd> <mn>0</mn> </mtd> </mtr> <mtr> <mtd> <mn>0</mn> </mtd> </mtr> </mtable> <mo>]</mo> </mrow> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\begin{bmatrix}R\\G\\B\end{bmatrix}}={\begin{bmatrix}1\\1\\1\end{bmatrix}}\implies {\begin{bmatrix}Y\\I\\Q\end{bmatrix}}={\begin{bmatrix}1\\0\\0\end{bmatrix}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/b63c3b11ce480fd52534c97a4706852026c6526b" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -4.005ex; width:33.982ex; height:9.176ex;" alt="{\displaystyle {\begin{bmatrix}R\\G\\B\end{bmatrix}}={\begin{bmatrix}1\\1\\1\end{bmatrix}}\implies {\begin{bmatrix}Y\\I\\Q\end{bmatrix}}={\begin{bmatrix}1\\0\\0\end{bmatrix}}}"></span></li></ul> <div class="mw-heading mw-heading3"><h3 id="FCC_NTSC_Standard_(SMPTE_C)"><span id="FCC_NTSC_Standard_.28SMPTE_C.29"></span>FCC NTSC Standard (SMPTE C)</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=YIQ&action=edit&section=6" title="Edit section: FCC NTSC Standard (SMPTE C)"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:SMPTE-C_RGB_color_cube.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d7/SMPTE-C_RGB_color_cube.png/220px-SMPTE-C_RGB_color_cube.png" decoding="async" width="220" height="220" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d7/SMPTE-C_RGB_color_cube.png/330px-SMPTE-C_RGB_color_cube.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d7/SMPTE-C_RGB_color_cube.png/440px-SMPTE-C_RGB_color_cube.png 2x" data-file-width="1024" data-file-height="1024" /></a><figcaption>SMPTE C color cube (color profile encoded, requires a compatible browser and monitor for accurate display).</figcaption></figure> <p>In 1987, the <a href="/wiki/Society_of_Motion_Picture_and_Television_Engineers" title="Society of Motion Picture and Television Engineers">Society of Motion Picture and Television Engineers</a> (SMPTE) Committee on Television Technology, Working Group on Studio Monitor Colorimetry, adopted the <a href="/wiki/SMPTE_C" class="mw-redirect" title="SMPTE C">SMPTE C</a>.<sup id="cite_ref-SMPTE_RP145_7-0" class="reference"><a href="#cite_note-SMPTE_RP145-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-SMPTE_EG27_8-0" class="reference"><a href="#cite_note-SMPTE_EG27-8"><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> The previous conversion formulas were deprecated, and the NTSC standard contained in the FCC rules for over-the-air analog color TV broadcasting adopted a different matrix:<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><sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="From_RGB_to_YIQ_2">From RGB to YIQ</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=YIQ&action=edit&section=7" title="Edit section: From RGB to YIQ"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <dl><dd><dl><dd><dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \left\{{\begin{array}{ccl}E_{Y}^{\prime }&=&0.30E_{R}^{\prime }+0.59E_{G}^{\prime }+0.11E_{B}^{\prime }\\E_{I}^{\prime }&=&-0.27(E_{B}^{\prime }-E_{Y}^{\prime })+0.74(E_{R}^{\prime }-E_{Y}^{\prime })\\E_{Q}^{\prime }&=&0.41(E_{B}^{\prime }-E_{Y}^{\prime })+0.48(E_{R}^{\prime }-E_{Y}^{\prime })\end{array}}\right.}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow> <mo>{</mo> <mrow class="MJX-TeXAtom-ORD"> <mtable columnalign="center center left" rowspacing="4pt" columnspacing="1em"> <mtr> <mtd> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>Y</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> </mtd> <mtd> <mo>=</mo> </mtd> <mtd> <mn>0.30</mn> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>R</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> <mo>+</mo> <mn>0.59</mn> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>G</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> <mo>+</mo> <mn>0.11</mn> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>B</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> </mtd> </mtr> <mtr> <mtd> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>I</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> </mtd> <mtd> <mo>=</mo> </mtd> <mtd> <mo>−</mo> <mn>0.27</mn> <mo stretchy="false">(</mo> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>B</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> <mo>−</mo> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>Y</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> <mo stretchy="false">)</mo> <mo>+</mo> <mn>0.74</mn> <mo stretchy="false">(</mo> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>R</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> <mo>−</mo> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>Y</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> <mo stretchy="false">)</mo> </mtd> </mtr> <mtr> <mtd> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>Q</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> </mtd> <mtd> <mo>=</mo> </mtd> <mtd> <mn>0.41</mn> <mo stretchy="false">(</mo> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>B</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> <mo>−</mo> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>Y</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> <mo stretchy="false">)</mo> <mo>+</mo> <mn>0.48</mn> <mo stretchy="false">(</mo> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>R</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> <mo>−</mo> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>Y</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> <mo stretchy="false">)</mo> </mtd> </mtr> </mtable> </mrow> <mo fence="true" stretchy="true" symmetric="true"></mo> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \left\{{\begin{array}{ccl}E_{Y}^{\prime }&=&0.30E_{R}^{\prime }+0.59E_{G}^{\prime }+0.11E_{B}^{\prime }\\E_{I}^{\prime }&=&-0.27(E_{B}^{\prime }-E_{Y}^{\prime })+0.74(E_{R}^{\prime }-E_{Y}^{\prime })\\E_{Q}^{\prime }&=&0.41(E_{B}^{\prime }-E_{Y}^{\prime })+0.48(E_{R}^{\prime }-E_{Y}^{\prime })\end{array}}\right.}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/98d64946039c006b933796ca7c1b5cfed6bf990d" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -4.48ex; margin-bottom: -0.191ex; width:47.527ex; height:10.509ex;" alt="{\displaystyle \left\{{\begin{array}{ccl}E_{Y}^{\prime }&=&0.30E_{R}^{\prime }+0.59E_{G}^{\prime }+0.11E_{B}^{\prime }\\E_{I}^{\prime }&=&-0.27(E_{B}^{\prime }-E_{Y}^{\prime })+0.74(E_{R}^{\prime }-E_{Y}^{\prime })\\E_{Q}^{\prime }&=&0.41(E_{B}^{\prime }-E_{Y}^{\prime })+0.48(E_{R}^{\prime }-E_{Y}^{\prime })\end{array}}\right.}"></span></dd></dl></dd></dl></dd></dl> <p>in matrix notation, that equation system is written as: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\begin{bmatrix}E_{Y}^{\prime }\\E_{I}^{\prime }\\E_{Q}^{\prime }\end{bmatrix}}={\begin{bmatrix}0.30&0.59&0.11\\0.599&-0.2773&-0.3217\\0.213&-0.5251&0.3121\end{bmatrix}}{\begin{bmatrix}E_{R}^{\prime }\\E_{G}^{\prime }\\E_{B}^{\prime }\end{bmatrix}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mrow> <mo>[</mo> <mtable rowspacing="4pt" columnspacing="1em"> <mtr> <mtd> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>Y</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> </mtd> </mtr> <mtr> <mtd> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>I</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> </mtd> </mtr> <mtr> <mtd> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>Q</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> </mtd> </mtr> </mtable> <mo>]</mo> </mrow> </mrow> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mrow> <mo>[</mo> <mtable rowspacing="4pt" columnspacing="1em"> <mtr> <mtd> <mn>0.30</mn> </mtd> <mtd> <mn>0.59</mn> </mtd> <mtd> <mn>0.11</mn> </mtd> </mtr> <mtr> <mtd> <mn>0.599</mn> </mtd> <mtd> <mo>−</mo> <mn>0.2773</mn> </mtd> <mtd> <mo>−</mo> <mn>0.3217</mn> </mtd> </mtr> <mtr> <mtd> <mn>0.213</mn> </mtd> <mtd> <mo>−</mo> <mn>0.5251</mn> </mtd> <mtd> <mn>0.3121</mn> </mtd> </mtr> </mtable> <mo>]</mo> </mrow> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mrow> <mo>[</mo> <mtable rowspacing="4pt" columnspacing="1em"> <mtr> <mtd> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>R</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> </mtd> </mtr> <mtr> <mtd> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>G</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> </mtd> </mtr> <mtr> <mtd> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>B</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> </mtd> </mtr> </mtable> <mo>]</mo> </mrow> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\begin{bmatrix}E_{Y}^{\prime }\\E_{I}^{\prime }\\E_{Q}^{\prime }\end{bmatrix}}={\begin{bmatrix}0.30&0.59&0.11\\0.599&-0.2773&-0.3217\\0.213&-0.5251&0.3121\end{bmatrix}}{\begin{bmatrix}E_{R}^{\prime }\\E_{G}^{\prime }\\E_{B}^{\prime }\end{bmatrix}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/574b9df491dd67aabc422188be0ca62e785ffa43" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -4.426ex; margin-bottom: -0.246ex; width:47.618ex; height:10.509ex;" alt="{\displaystyle {\begin{bmatrix}E_{Y}^{\prime }\\E_{I}^{\prime }\\E_{Q}^{\prime }\end{bmatrix}}={\begin{bmatrix}0.30&0.59&0.11\\0.599&-0.2773&-0.3217\\0.213&-0.5251&0.3121\end{bmatrix}}{\begin{bmatrix}E_{R}^{\prime }\\E_{G}^{\prime }\\E_{B}^{\prime }\end{bmatrix}}}"></span></dd></dl> <p>Where: </p> <ul><li><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle E_{Y}^{\prime }}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>Y</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle E_{Y}^{\prime }}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/1148580f8b783f577b0cd616112d7412e5118e7c" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.005ex; width:3.201ex; height:2.843ex;" alt="{\displaystyle E_{Y}^{\prime }}"></span> is the <a href="/wiki/Gamma_correction" title="Gamma correction">gamma-corrected</a> voltage of luma.</li> <li><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle E_{R}^{\prime }}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>R</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle E_{R}^{\prime }}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/7175f588a3f7d558f842e0a74b50f25a7236d5ae" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.005ex; width:3.195ex; height:2.843ex;" alt="{\displaystyle E_{R}^{\prime }}"></span>, <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle E_{G}^{\prime }}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>G</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle E_{G}^{\prime }}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/189cf154379cd0603a068341ac5a3933c45b240e" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.005ex; width:3.239ex; height:2.843ex;" alt="{\displaystyle E_{G}^{\prime }}"></span> and <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle E_{B}^{\prime }}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>B</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle E_{B}^{\prime }}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/f331394fba390ede42db9c5db87ae9fd4718fd57" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.005ex; width:3.195ex; height:2.843ex;" alt="{\displaystyle E_{B}^{\prime }}"></span> are the gamma-corrected voltages corresponding to red, green, and blue signals.</li> <li><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle E_{I}^{\prime }}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>I</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle E_{I}^{\prime }}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/26087f96ea5e8790ea4ea61c91d4768faca49342" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.005ex; width:2.776ex; height:2.843ex;" alt="{\displaystyle E_{I}^{\prime }}"></span> and <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle E_{Q}^{\prime }}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>Q</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle E_{Q}^{\prime }}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/55cb9e401da5e028c1706eb1e236eb2b24befaa9" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.338ex; width:3.247ex; height:3.176ex;" alt="{\displaystyle E_{Q}^{\prime }}"></span> are the amplitudes of the orthogonal components of the chrominance signal.</li></ul> <div class="mw-heading mw-heading4"><h4 id="From_YIQ_to_RGB_2">From YIQ to RGB</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=YIQ&action=edit&section=8" title="Edit section: From YIQ to RGB"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>To convert from FCC YIQ to RGB: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle E_{R}^{\prime }=E_{Y}^{\prime }+0.9469E_{I}^{\prime }+0.6236E_{Q}^{\prime }}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>R</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> <mo>=</mo> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>Y</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> <mo>+</mo> <mn>0.9469</mn> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>I</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> <mo>+</mo> <mn>0.6236</mn> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>Q</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle E_{R}^{\prime }=E_{Y}^{\prime }+0.9469E_{I}^{\prime }+0.6236E_{Q}^{\prime }}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/3248641d72b41f517254738248400c6985b82165" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.338ex; width:34.117ex; height:3.176ex;" alt="{\displaystyle E_{R}^{\prime }=E_{Y}^{\prime }+0.9469E_{I}^{\prime }+0.6236E_{Q}^{\prime }}"></span></dd> <dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle E_{G}^{\prime }=E_{Y}^{\prime }-0.2748E_{I}^{\prime }-0.6357E_{Q}^{\prime }}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>G</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> <mo>=</mo> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>Y</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> <mo>−</mo> <mn>0.2748</mn> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>I</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> <mo>−</mo> <mn>0.6357</mn> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>Q</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle E_{G}^{\prime }=E_{Y}^{\prime }-0.2748E_{I}^{\prime }-0.6357E_{Q}^{\prime }}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/a614bc5868edd2c4b4c722e6d8c7c673dfd6ef94" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.338ex; width:34.161ex; height:3.176ex;" alt="{\displaystyle E_{G}^{\prime }=E_{Y}^{\prime }-0.2748E_{I}^{\prime }-0.6357E_{Q}^{\prime }}"></span></dd> <dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle E_{B}^{\prime }=E_{Y}^{\prime }-1.1E_{I}^{\prime }+1.7E_{Q}^{\prime }}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>B</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> <mo>=</mo> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>Y</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> <mo>−</mo> <mn>1.1</mn> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>I</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> <mo>+</mo> <mn>1.7</mn> <msubsup> <mi>E</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>Q</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-variant" mathvariant="normal">′</mi> </mrow> </msubsup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle E_{B}^{\prime }=E_{Y}^{\prime }-1.1E_{I}^{\prime }+1.7E_{Q}^{\prime }}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/67bd19c559fae0773e28a4e4229be952ce148ad3" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.338ex; width:27.142ex; height:3.176ex;" alt="{\displaystyle E_{B}^{\prime }=E_{Y}^{\prime }-1.1E_{I}^{\prime }+1.7E_{Q}^{\prime }}"></span></dd></dl> <div class="mw-heading mw-heading4"><h4 id="From_YUV_to_YIQ_and_vice_versa">From YUV to YIQ and vice versa</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=YIQ&action=edit&section=9" title="Edit section: From YUV to YIQ and vice versa"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\begin{bmatrix}Y'\\I\\Q\end{bmatrix}}={\begin{bmatrix}1&0&0\\0&-\sin(33^{\circ })&\cos(33^{\circ })\\0&\cos(33^{\circ })&\sin(33^{\circ })\end{bmatrix}}{\begin{bmatrix}Y'\\U\\V\end{bmatrix}}\approx {\begin{bmatrix}1&0&0\\0&-0.54464&0.83867\\0&0.83867&0.54464\end{bmatrix}}{\begin{bmatrix}Y'\\U\\V\end{bmatrix}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mrow> <mo>[</mo> <mtable rowspacing="4pt" columnspacing="1em"> <mtr> <mtd> <msup> <mi>Y</mi> <mo>′</mo> </msup> </mtd> </mtr> <mtr> <mtd> <mi>I</mi> </mtd> </mtr> <mtr> <mtd> <mi>Q</mi> </mtd> </mtr> </mtable> <mo>]</mo> </mrow> </mrow> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mrow> <mo>[</mo> <mtable rowspacing="4pt" columnspacing="1em"> <mtr> <mtd> <mn>1</mn> </mtd> <mtd> <mn>0</mn> </mtd> <mtd> <mn>0</mn> </mtd> </mtr> <mtr> <mtd> <mn>0</mn> </mtd> <mtd> <mo>−</mo> <mi>sin</mi> <mo>⁡</mo> <mo stretchy="false">(</mo> <msup> <mn>33</mn> <mrow class="MJX-TeXAtom-ORD"> <mo>∘</mo> </mrow> </msup> <mo stretchy="false">)</mo> </mtd> <mtd> <mi>cos</mi> <mo>⁡</mo> <mo stretchy="false">(</mo> <msup> <mn>33</mn> <mrow class="MJX-TeXAtom-ORD"> <mo>∘</mo> </mrow> </msup> <mo stretchy="false">)</mo> </mtd> </mtr> <mtr> <mtd> <mn>0</mn> </mtd> <mtd> <mi>cos</mi> <mo>⁡</mo> <mo stretchy="false">(</mo> <msup> <mn>33</mn> <mrow class="MJX-TeXAtom-ORD"> <mo>∘</mo> </mrow> </msup> <mo stretchy="false">)</mo> </mtd> <mtd> <mi>sin</mi> <mo>⁡</mo> <mo stretchy="false">(</mo> <msup> <mn>33</mn> <mrow class="MJX-TeXAtom-ORD"> <mo>∘</mo> </mrow> </msup> <mo stretchy="false">)</mo> </mtd> </mtr> </mtable> <mo>]</mo> </mrow> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mrow> <mo>[</mo> <mtable rowspacing="4pt" columnspacing="1em"> <mtr> <mtd> <msup> <mi>Y</mi> <mo>′</mo> </msup> </mtd> </mtr> <mtr> <mtd> <mi>U</mi> </mtd> </mtr> <mtr> <mtd> <mi>V</mi> </mtd> </mtr> </mtable> <mo>]</mo> </mrow> </mrow> <mo>≈</mo> <mrow class="MJX-TeXAtom-ORD"> <mrow> <mo>[</mo> <mtable rowspacing="4pt" columnspacing="1em"> <mtr> <mtd> <mn>1</mn> </mtd> <mtd> <mn>0</mn> </mtd> <mtd> <mn>0</mn> </mtd> </mtr> <mtr> <mtd> <mn>0</mn> </mtd> <mtd> <mo>−</mo> <mn>0.54464</mn> </mtd> <mtd> <mn>0.83867</mn> </mtd> </mtr> <mtr> <mtd> <mn>0</mn> </mtd> <mtd> <mn>0.83867</mn> </mtd> <mtd> <mn>0.54464</mn> </mtd> </mtr> </mtable> <mo>]</mo> </mrow> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mrow> <mo>[</mo> <mtable rowspacing="4pt" columnspacing="1em"> <mtr> <mtd> <msup> <mi>Y</mi> <mo>′</mo> </msup> </mtd> </mtr> <mtr> <mtd> <mi>U</mi> </mtd> </mtr> <mtr> <mtd> <mi>V</mi> </mtd> </mtr> </mtable> <mo>]</mo> </mrow> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\begin{bmatrix}Y'\\I\\Q\end{bmatrix}}={\begin{bmatrix}1&0&0\\0&-\sin(33^{\circ })&\cos(33^{\circ })\\0&\cos(33^{\circ })&\sin(33^{\circ })\end{bmatrix}}{\begin{bmatrix}Y'\\U\\V\end{bmatrix}}\approx {\begin{bmatrix}1&0&0\\0&-0.54464&0.83867\\0&0.83867&0.54464\end{bmatrix}}{\begin{bmatrix}Y'\\U\\V\end{bmatrix}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/cf5772c1219efe1091951238d3844d528756cedf" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -4.171ex; width:80.418ex; height:9.509ex;" alt="{\displaystyle {\begin{bmatrix}Y'\\I\\Q\end{bmatrix}}={\begin{bmatrix}1&0&0\\0&-\sin(33^{\circ })&\cos(33^{\circ })\\0&\cos(33^{\circ })&\sin(33^{\circ })\end{bmatrix}}{\begin{bmatrix}Y'\\U\\V\end{bmatrix}}\approx {\begin{bmatrix}1&0&0\\0&-0.54464&0.83867\\0&0.83867&0.54464\end{bmatrix}}{\begin{bmatrix}Y'\\U\\V\end{bmatrix}}}"></span> </p><p>Due to orthogonal symmetry (symmetry is not required or enough) of the matrix the same matrix can be used for YIQ to YUV conversion.<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> </p> <div class="mw-heading mw-heading2"><h2 id="Phase-out">Phase-out</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=YIQ&action=edit&section=10" title="Edit section: Phase-out"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Most NTSC territories have <a href="/wiki/Digital_television_transition" title="Digital television transition">switched over to digital television</a>. For broadcasting in the United States, NTSC (and with it, YIQ) remained in use only for <a href="/wiki/Low-power_broadcasting" title="Low-power broadcasting">low-power television</a> stations as of July 2011<sup class="plainlinks noexcerpt noprint asof-tag update" style="display:none;"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=YIQ&action=edit">[update]</a></sup>, well after full-power analog transmissions was ended by the <a href="/wiki/Federal_Communications_Commission" title="Federal Communications Commission">Federal Communications Commission</a> (FCC) on June 12, 2009, however these were also required to be shut down by the FCC on July 13, 2021,<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> thereby ending the use of NTSC (and YIQ for that matter) completely in that region. </p> <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=YIQ&action=edit&section=11" 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://culorijs.org/color-spaces/">"Color Spaces"</a>. <i>culori</i><span class="reference-accessdate">. Retrieved <span class="nowrap">27 February</span> 2022</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=culori&rft.atitle=Color+Spaces&rft_id=https%3A%2F%2Fculorijs.org%2Fcolor-spaces%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AYIQ" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFSedgewickWayne2020" class="citation web cs1">Sedgewick; Wayne (2020). <a rel="nofollow" class="external text" href="https://introcs.cs.princeton.edu/java/12types/">"Built-in Types of Data"</a>. <i>introcs.cs.princeton.edu</i><span class="reference-accessdate">. Retrieved <span class="nowrap">27 February</span> 2022</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=introcs.cs.princeton.edu&rft.atitle=Built-in+Types+of+Data&rft.date=2020&rft.au=Sedgewick&rft.au=Wayne&rft_id=https%3A%2F%2Fintrocs.cs.princeton.edu%2Fjava%2F12types%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AYIQ" 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.mathworks.com/help/images/ref/rgb2ntsc.html">"rgb2ntsc: Convert RGB color values to NTSC color space"</a>. <i>Image Processing Toolbox Documentation</i>. MathWorks<span class="reference-accessdate">. Retrieved <span class="nowrap">28 June</span> 2015</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Image+Processing+Toolbox+Documentation&rft.atitle=rgb2ntsc%3A+Convert+RGB+color+values+to+NTSC+color+space&rft_id=http%3A%2F%2Fwww.mathworks.com%2Fhelp%2Fimages%2Fref%2Frgb2ntsc.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AYIQ" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</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.mathworks.com/help/images/ref/ntsc2rgb.html">"ntsc2rgb: Convert NTSC values to RGB color space"</a>. <i>Image Processing Toolbox Documentation</i>. MathWorks<span class="reference-accessdate">. Retrieved <span class="nowrap">28 June</span> 2015</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Image+Processing+Toolbox+Documentation&rft.atitle=ntsc2rgb%3A+Convert+NTSC+values+to+RGB+color+space&rft_id=http%3A%2F%2Fwww.mathworks.com%2Fhelp%2Fimages%2Fref%2Fntsc2rgb.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AYIQ" class="Z3988"></span></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text">47 CFR § 73.682 (20) (iv)</span> </li> <li id="cite_note-ITU-R-BT1700-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-ITU-R-BT1700_6-0">^</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://www.itu.int/rec/R-REC-BT.1700-0-200502-I/en">"ITU-R BT.1700 Characteristics of composite video signals for conventional analogue television systems"</a> <span class="cs1-format">(zip/pdf)</span>. <a href="/wiki/International_Telecommunication_Union" title="International Telecommunication Union">International Telecommunication Union</a>. 2004-11-30. S170m-2004.pdf: Composite Analog Video Signal NTSC for Studio Applications Page 6<span class="reference-accessdate">. Retrieved <span class="nowrap">2019-04-16</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=ITU-R+BT.1700+Characteristics+of+composite+video+signals+for+conventional+analogue+television+systems&rft.pages=S170m-2004.pdf%3A+Composite+Analog+Video+Signal+NTSC+for+Studio+Applications+Page+6&rft.pub=International+Telecommunication+Union&rft.date=2004-11-30&rft_id=https%3A%2F%2Fwww.itu.int%2Frec%2FR-REC-BT.1700-0-200502-I%2Fen&rfr_id=info%3Asid%2Fen.wikipedia.org%3AYIQ" class="Z3988"></span></span> </li> <li id="cite_note-SMPTE_RP145-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-SMPTE_RP145_7-0">^</a></b></span> <span class="reference-text">Society of Motion Picture and Television Engineers (1987–2004): Recommended Practice RP 145-2004. Color Monitor Colorimetry.</span> </li> <li id="cite_note-SMPTE_EG27-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-SMPTE_EG27_8-0">^</a></b></span> <span class="reference-text">Society of Motion Picture and Television Engineers (1994, 2004): Engineering Guideline EG 27-2004. Supplemental Information for SMPTE 170M and Background on the Development of NTSC Color Standards, pp. 9</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">Advanced Television Systems Committee (2003): ATSC Direct-to-Home Satellite Broadcast Standard Doc. A/81, pp.18</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 book cs1"><a rel="nofollow" class="external text" href="https://www.govinfo.gov/content/pkg/CFR-2013-title47-vol4/pdf/CFR-2013-title47-vol4-sec73-682.pdf"><i>§ 73.682 TV transmission standards</i></a> <span class="cs1-format">(PDF)</span>. FCC. 2013. p. 210.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=%C2%A7+73.682+TV+transmission+standards&rft.pages=210&rft.pub=FCC&rft.date=2013&rft_id=https%3A%2F%2Fwww.govinfo.gov%2Fcontent%2Fpkg%2FCFR-2013-title47-vol4%2Fpdf%2FCFR-2013-title47-vol4-sec73-682.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AYIQ" class="Z3988"></span></span> </li> <li id="cite_note-11"><span class="mw-cite-backlink"><b><a href="#cite_ref-11">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.470-6-199811-S!!PDF-E.pdf#page=9"><i>Rec. ITU-R BT.470-6 - Conventional Television Systems</i></a> <span class="cs1-format">(PDF)</span>. ITU-R. 1998. p. 9.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Rec.+ITU-R+BT.470-6+-+Conventional+Television+Systems&rft.pages=9&rft.pub=ITU-R&rft.date=1998&rft_id=https%3A%2F%2Fwww.itu.int%2Fdms_pubrec%2Fitu-r%2Frec%2Fbt%2FR-REC-BT.470-6-199811-S%21%21PDF-E.pdf%23page%3D9&rfr_id=info%3Asid%2Fen.wikipedia.org%3AYIQ" 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.compression.ru/download/articles/color_space/ch03.pdf">"Chapter 3: Color Spaces"</a> <span class="cs1-format">(PDF)</span><span class="reference-accessdate">. Retrieved <span class="nowrap">2022-03-05</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Chapter+3%3A+Color+Spaces&rft_id=https%3A%2F%2Fwww.compression.ru%2Fdownload%2Farticles%2Fcolor_space%2Fch03.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AYIQ" 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://www.fcc.gov/consumers/guides/low-power-television-lptv-service">"Low Power Television Service"</a>. <i>fcc.gov</i>. FCC<span class="reference-accessdate">. Retrieved <span class="nowrap">June 24,</span> 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=fcc.gov&rft.atitle=Low+Power+Television+Service&rft_id=https%3A%2F%2Fwww.fcc.gov%2Fconsumers%2Fguides%2Flow-power-television-lptv-service&rfr_id=info%3Asid%2Fen.wikipedia.org%3AYIQ" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="Further_reading">Further reading</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=YIQ&action=edit&section=12" title="Edit section: Further reading"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>Buchsbaum, Walter H. <i>Color TV Servicing, third edition</i>. Englewood Cliffs, NJ: Prentice Hall, 1975. <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0-13-152397-X" title="Special:BookSources/0-13-152397-X">0-13-152397-X</a></li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output 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.navbox-abovebelow,.mw-parser-output .navbox-group,.mw-parser-output .navbox-subgroup .navbox-title{background-color:#ddf}.mw-parser-output .navbox-subgroup .navbox-group,.mw-parser-output .navbox-subgroup .navbox-abovebelow{background-color:#e6e6ff}.mw-parser-output .navbox-even{background-color:#f7f7f7}.mw-parser-output .navbox-odd{background-color:transparent}.mw-parser-output .navbox .hlist td dl,.mw-parser-output .navbox .hlist td ol,.mw-parser-output .navbox .hlist td ul,.mw-parser-output .navbox td.hlist dl,.mw-parser-output .navbox td.hlist ol,.mw-parser-output .navbox td.hlist ul{padding:0.125em 0}.mw-parser-output .navbox .navbar{display:block;font-size:100%}.mw-parser-output .navbox-title .navbar{float:left;text-align:left;margin-right:0.5em}body.skin--responsive .mw-parser-output .navbox-image img{max-width:none!important}@media print{body.ns-0 .mw-parser-output .navbox{display:none!important}}</style></div><div role="navigation" class="navbox" aria-labelledby="Color_space" style="padding:3px"><table class="nowraplinks hlist mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Color_space" title="Template:Color space"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Color_space" title="Template talk:Color space"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Color_space" title="Special:EditPage/Template:Color space"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Color_space" style="font-size:114%;margin:0 4em"><a href="/wiki/Color_space" title="Color space">Color space</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="2"><div> <ul><li><a href="/wiki/List_of_color_spaces_and_their_uses" title="List of color spaces and their uses">List of color spaces</a></li> <li><a href="/wiki/Color_model" title="Color model">Color models</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Color_appearance_model" title="Color appearance model">CAM</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/CIECAM02" title="CIECAM02">CIECAM02</a></li> <li><a href="/wiki/ICAM_(color_appearance_model)" title="ICAM (color appearance model)">iCAM</a></li> <li><a href="/wiki/CAM16" class="mw-redirect" title="CAM16">CAM16</a></li> <li><a href="/w/index.php?title=CIECAM16&action=edit&redlink=1" class="new" title="CIECAM16 (page does not exist)">CIECAM16</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/International_Commission_on_Illumination" title="International Commission on Illumination">CIE</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/CIE_1931_color_space" title="CIE 1931 color space">XYZ (1931)</a></li> <li><a href="/wiki/CIE_1931_color_space#CIE_RGB_color_space" title="CIE 1931 color space">RGB (1931)</a></li> <li><a href="/wiki/CIE_1960_color_space" title="CIE 1960 color space">YUV (1960)</a></li> <li><a href="/wiki/CIE_1964_color_space" title="CIE 1964 color space">UVW (1964)</a></li> <li><a href="/wiki/CIELAB_color_space" title="CIELAB color space">CIELAB (1976)</a></li> <li><a href="/wiki/CIELUV" title="CIELUV">CIELUV (1976)</a></li> <li><a href="/wiki/CIECAM02" title="CIECAM02">CIECAM02</a></li> <li><a href="/w/index.php?title=CIECAM16&action=edit&redlink=1" class="new" title="CIECAM16 (page does not exist)">CIECAM16</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/RGB_color_model" title="RGB color model">RGB</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/RGB_color_spaces" title="RGB color spaces">RGB color spaces</a></li> <li><a href="/wiki/SRGB" title="SRGB">sRGB</a></li> <li><a href="/wiki/Rg_chromaticity" title="Rg chromaticity">rg chromaticity</a></li> <li><a href="/wiki/Adobe_RGB_color_space" title="Adobe RGB color space">Adobe</a></li> <li><a href="/wiki/Wide-gamut_RGB_color_space" title="Wide-gamut RGB color space">Wide-gamut</a></li> <li><a href="/wiki/ProPhoto_RGB_color_space" title="ProPhoto RGB color space">ProPhoto</a></li> <li><a href="/wiki/ScRGB" title="ScRGB">scRGB</a></li> <li><a href="/wiki/DCI-P3" title="DCI-P3">DCI-P3</a></li> <li><a href="/wiki/Rec._601" title="Rec. 601">Rec. 601</a></li> <li><a href="/wiki/NTSC#SMPTE_C" title="NTSC">SMPTE 240M/"C"</a></li> <li><a href="/wiki/Rec._709" title="Rec. 709">Rec. 709</a></li> <li><a href="/wiki/Rec._2020" title="Rec. 2020">Rec. 2020</a></li> <li><a href="/wiki/Rec._2100" title="Rec. 2100">Rec. 2100</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Y%E2%80%B2UV" title="Y′UV">Y′UV</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/Y%E2%80%B2UV" title="Y′UV">YUV</a> <ul><li><a href="/wiki/PAL" title="PAL">PAL</a></li></ul></li> <li><a href="/wiki/YDbDr" title="YDbDr">YDbDr</a> <ul><li><a href="/wiki/SECAM" title="SECAM">SECAM</a></li></ul></li> <li><a class="mw-selflink selflink">YIQ</a> <ul><li><a href="/wiki/NTSC" title="NTSC">NTSC</a></li></ul></li> <li><a href="/wiki/YCbCr" title="YCbCr">YCbCr</a> <ul><li><a href="/wiki/Rec._601" title="Rec. 601">Rec. 601</a></li> <li><a href="/wiki/Rec._709" title="Rec. 709">Rec. 709</a></li> <li><a href="/wiki/Rec._2020" title="Rec. 2020">Rec. 2020</a></li> <li><a href="/wiki/Rec._2100" title="Rec. 2100">Rec. 2100</a></li></ul></li> <li><a href="/wiki/ICtCp" title="ICtCp">ICtCp</a> <ul><li><a href="/wiki/Rec._2100" title="Rec. 2100">Rec. 2100</a></li></ul></li> <li><a href="/wiki/YPbPr" title="YPbPr">YPbPr</a> <ul><li><a href="/wiki/Multiplexed_Analogue_Components" title="Multiplexed Analogue Components">MAC</a></li></ul></li> <li><a href="/wiki/XvYCC" title="XvYCC">xvYCC</a></li> <li><a href="/wiki/YCoCg" title="YCoCg">YCoCg</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</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/CcMmYK_color_model" title="CcMmYK color model">CcMmYK</a></li> <li><a href="/wiki/CMYK_color_model" title="CMYK color model">CMYK</a></li> <li><a href="/wiki/ColorADD" title="ColorADD">ColorADD</a></li> <li><a href="/wiki/Coloroid" title="Coloroid">Coloroid</a></li> <li><a href="/wiki/LMS_color_space" title="LMS color space">LMS</a></li> <li><a href="/wiki/Hexachrome" title="Hexachrome">Hexachrome</a></li> <li><a href="/wiki/HSL_and_HSV" title="HSL and HSV">HSL, HSV</a></li> <li><a href="/wiki/HCL_color_space" title="HCL color space">HCL</a></li> <li><a href="/wiki/Impossible_color" title="Impossible color">Imaginary color</a></li> <li><a href="/wiki/Oklab_color_space" title="Oklab color space">Oklab</a></li> <li><a href="/wiki/OSA-UCS" title="OSA-UCS">OSA-UCS</a></li> <li><a href="/wiki/Practical_Color_Coordinate_System" title="Practical Color Coordinate System">PCCS</a></li> <li><a href="/wiki/RG_color_models" title="RG color models">RG</a></li> <li><a href="/wiki/RYB_color_model" title="RYB color model">RYB</a></li> <li><a href="/wiki/HWB_color_model" title="HWB color model">HWB</a></li> <li><a href="/wiki/YJK" title="YJK">YJK</a></li> <li><a href="/wiki/TSL_color_space" title="TSL color space">TSL</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Color systems<br />and standards</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/Academy_Color_Encoding_System" title="Academy Color Encoding System">ACES</a></li> <li><a href="/wiki/News_Media_Alliance" title="News Media Alliance">ANPA</a></li> <li><a href="/wiki/Colour_Index_International" title="Colour Index International">Colour Index International</a> <ul><li><a href="/wiki/List_of_dyes" title="List of dyes">CI list of dyes</a></li></ul></li> <li><a href="/wiki/DIC_Corporation" title="DIC Corporation">DIC</a></li> <li><a href="/wiki/Federal_Standard_595" title="Federal Standard 595">Federal Standard 595</a></li> <li><a href="/wiki/HKS_(colour_system)" title="HKS (colour system)">HKS</a></li> <li><a href="/wiki/ICC_profile" title="ICC profile">ICC profile</a></li> <li><a href="/wiki/ISCC%E2%80%93NBS_system" title="ISCC–NBS system">ISCC–NBS</a></li> <li><a href="/wiki/Munsell_color_system" title="Munsell color system">Munsell</a></li> <li><a href="/wiki/Natural_Color_System" title="Natural Color System">NCS</a></li> <li><a href="/wiki/Ostwald_color_system" title="Ostwald color system">Ostwald</a></li> <li><a href="/wiki/Pantone" title="Pantone">Pantone</a></li> <li><a href="/wiki/RAL_colour_standard" title="RAL colour standard">RAL</a> <ul><li><a href="/wiki/List_of_RAL_colors" class="mw-redirect" title="List of RAL colors">list</a></li></ul></li> <li><a href="/w/index.php?title=JIS_Z8102&action=edit&redlink=1" class="new" title="JIS Z8102 (page does not exist)">JIS Z8102</a><span class="noprint" style="font-size:85%; font-style: normal;"> [<a href="https://ja.wikipedia.org/wiki/JIS%E6%85%A3%E7%94%A8%E8%89%B2%E5%90%8D" class="extiw" title="ja:JIS慣用色名">ja</a>]</span></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div>For the vision capacities of organisms or machines, see <span class="noviewer" typeof="mw:File"><span title="Template"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/83/Symbol_template_class_pink.svg/16px-Symbol_template_class_pink.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/83/Symbol_template_class_pink.svg/23px-Symbol_template_class_pink.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/83/Symbol_template_class_pink.svg/31px-Symbol_template_class_pink.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <a href="/wiki/Template:Eye_physiology" title="Template:Eye physiology">Color vision</a>.</div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1&useformat=desktop" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=YIQ&oldid=1251661323">https://en.wikipedia.org/w/index.php?title=YIQ&oldid=1251661323</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Category</a>: <ul><li><a href="/wiki/Category:Color_space" title="Category:Color space">Color space</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Hidden categories: <ul><li><a href="/wiki/Category:Articles_with_short_description" title="Category:Articles with short description">Articles with short 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