Color Management addon/de - Revision history

http://rawpedia.rawtherapee.com/index.php?action=history&feed=atom&title=Color_Management_addon%2Fde Color Management addon/de - Revision history 2026-06-11T07:30:55Z Revision history for this page on the wiki MediaWiki 1.38.4 http://rawpedia.rawtherapee.com/index.php?title=Color_Management_addon/de&diff=3808&oldid=prev DrSlony: Small LUTf revision 2018-06-04T06:53:32Z

<p>Small LUTf revision</p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 06:53, 4 June 2018</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l276">Line 276:</td> <td colspan="2" class="diff-lineno">Line 276:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>=== The "Munsell" correction ===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>=== The "Munsell" correction ===</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Goal: to give the user possibility to automatically correct the colours that are sometimes false in Lab mode when modifying the saturation, mostly in the blues-crimsons, reds-yellows and the greens (Munsell type correction)</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Goal: to give the user possibility to automatically correct the colours that are sometimes false in Lab mode when modifying the saturation, mostly in the blues-crimsons, reds-yellows and the greens (Munsell type correction)<ins style="font-weight: bold; text-decoration: none;">.</ins></div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>This goal <del style="font-weight: bold; text-decoration: none;">needs </del>the creation of 160 LUTf:</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>This goal <ins style="font-weight: bold; text-decoration: none;">requires </ins>the creation of 160 <ins style="font-weight: bold; text-decoration: none;">look-up tables (LUT) with floating-point precision (</ins>LUTf<ins style="font-weight: bold; text-decoration: none;">)</ins>:</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>*<del style="font-weight: bold; text-decoration: none;">these </del>LUTf give to each colour (in Munsell sense), each luminance, hue values on a chromaticity basis: 2, 3 or 4 points are set for chromaticities [0..180] from 5, 45, 85, 125 or even 139 when possible. Intermediate values are linearly interpolated. These LUT cause a minimal memory occupation: each one has between 45 and 140 entries, that means about 16000 entries at the total... </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* <ins style="font-weight: bold; text-decoration: none;">These </ins>LUTf give to each colour (in Munsell sense), each luminance, hue values on a chromaticity basis: 2, 3 or 4 points are set for chromaticities [0..180] from 5, 45, 85, 125 or even 139 when possible. Intermediate values are linearly interpolated. These LUT cause a minimal memory occupation: each one has between 45 and 140 entries, that means about 16000 entries at the total... </div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>*<del style="font-weight: bold; text-decoration: none;">the </del>LUTf are realised for four critical areas, where the drift compared with the Lab mode is important (blue-crimson, red-yellow, green, red-crimson), for the other areas the gaps are low, in any cases very much under the matrix and ICC profiles possibilities.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* <ins style="font-weight: bold; text-decoration: none;">The </ins>LUTf are realised for four critical areas, where the drift compared with the Lab mode is important (blue-crimson, red-yellow, green, red-crimson), for the other areas the gaps are low, in any cases very much under the matrix and ICC profiles possibilities.</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>*<del style="font-weight: bold; text-decoration: none;">these </del>LUTf have the C illuminant as basis (slightly different of D50 or D65), but due to the fact that we work on a gap basis and not on absolute values, the calculation error is very low (less than 1% of the correction, in any cases very much under the matrix and ICC profiles possibilities).</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* <ins style="font-weight: bold; text-decoration: none;">These </ins>LUTf have the C illuminant as basis (slightly different of D50 or D65), but due to the fact that we work on a gap basis and not on absolute values, the calculation error is very low (less than 1% of the correction, in any cases very much under the matrix and ICC profiles possibilities).</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>*<del style="font-weight: bold; text-decoration: none;">theses </del>corrections are quick, nevertheless they <del style="font-weight: bold; text-decoration: none;">are increasing </del>the "vibrance" or "Lab adjustments" processing time <del style="font-weight: bold; text-decoration: none;">of </del>about 10%.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* <ins style="font-weight: bold; text-decoration: none;">These </ins>corrections are quick, nevertheless they <ins style="font-weight: bold; text-decoration: none;">increase </ins>the "vibrance" or "Lab adjustments" processing time <ins style="font-weight: bold; text-decoration: none;">by </ins>about 10%.</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>*<del style="font-weight: bold; text-decoration: none;">if </del>"verbose" option is enabled, we can see appear for each correction type, the concerned number of pixels and a rough idea of the correction size (in radians). For correction values in radians, the colour gap in deltaE94 is the following:</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* <ins style="font-weight: bold; text-decoration: none;">If </ins>"verbose" option is enabled, we can see appear for each correction type, the concerned number of pixels and a rough idea of the correction size (in radians). For correction values in radians, the colour gap in deltaE94 is the following:</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>#correction=0.4 rad deltaE94=12 for blue-crimson</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>#correction=0.4 rad deltaE94=12 for blue-crimson</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>#correction=0.2 rad deltaE94=8 for red-yellow</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>#correction=0.2 rad deltaE94=8 for red-yellow</div></td></tr> </table>

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