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Update notes for 2017-03-03
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@ -22,10 +22,30 @@ $ identify ~/Desktop/alc_contrastes_desafios.jpg
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<!--more-->
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- This results in discolored thumbnails, sRGB and CMYK:
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- This results in discolored thumbnails when compared to the original PDF, for example sRGB and CMYK:
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- I filed an issue for the color space thing: [DS-3517](https://jira.duraspace.org/browse/DS-3517)
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## 2017-03-03
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- I created a patch for DS-3517 and made a pull request against upstream `dspace-5_x`: https://github.com/DSpace/DSpace/pull/1669
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- Looks like `-colorspace sRGB` alone isn't enough, we need to use profiles:
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```
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$ convert -thumbnail 300x300 -flatten -profile /opt/brew/Cellar/ghostscript/9.20/share/ghostscript/9.20/iccprofiles/default_cmyk.icc -profile /opt/brew/Cellar/ghostscript/9.20/share/ghostscript/9.20/iccprofiles/default_rgb.icc alc_contrastes_desafios.pdf\[0\] alc_contrastes_desafios.pdf.jpg
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```
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- This is a great resource describing the color stuff: http://www.imagemagick.org/Usage/formats/#profiles
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- Somehow we need to detect the color system being used by the input file and handle each case differently
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- This is trivial with `identify` (even by the [Java ImageMagick API](http://im4java.sourceforge.net/api/org/im4java/core/IMOps.html#identify)):
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```
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$ identify -format '%r\n' alc_contrastes_desafios.pdf\[0\]
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DirectClass CMYK
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$ identify -format '%r\n' Africa\ group\ of\ negotiators.pdf\[0\]
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DirectClass sRGB Alpha
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```
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@ -82,7 +82,7 @@ $ identify ~/Desktop/alc_contrastes_desafios.jpg
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"headline": "March, 2017",
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"url": "https://alanorth.github.io/cgspace-notes/2017-03/",
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"wordCount": "113",
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"wordCount": "218",
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"datePublished": "2017-03-01T17:08:52+02:00",
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@ -178,7 +178,7 @@ $ identify ~/Desktop/alc_contrastes_desafios.jpg
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<p></p>
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<ul>
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<li>This results in discolored thumbnails, sRGB and CMYK:</li>
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<li>This results in discolored thumbnails when compared to the original PDF, for example sRGB and CMYK:</li>
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</ul>
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<p><img src="/cgspace-notes/2017/03/thumbnail-srgb.jpg" alt="Thumbnail in sRGB colorspace" /></p>
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@ -189,6 +189,28 @@ $ identify ~/Desktop/alc_contrastes_desafios.jpg
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<li>I filed an issue for the color space thing: <a href="https://jira.duraspace.org/browse/DS-3517">DS-3517</a></li>
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</ul>
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<h2 id="2017-03-03">2017-03-03</h2>
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<ul>
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<li>I created a patch for DS-3517 and made a pull request against upstream <code>dspace-5_x</code>: <a href="https://github.com/DSpace/DSpace/pull/1669">https://github.com/DSpace/DSpace/pull/1669</a></li>
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<li>Looks like <code>-colorspace sRGB</code> alone isn’t enough, we need to use profiles:</li>
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</ul>
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<pre><code>$ convert -thumbnail 300x300 -flatten -profile /opt/brew/Cellar/ghostscript/9.20/share/ghostscript/9.20/iccprofiles/default_cmyk.icc -profile /opt/brew/Cellar/ghostscript/9.20/share/ghostscript/9.20/iccprofiles/default_rgb.icc alc_contrastes_desafios.pdf\[0\] alc_contrastes_desafios.pdf.jpg
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</code></pre>
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<ul>
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<li>This is a great resource describing the color stuff: <a href="http://www.imagemagick.org/Usage/formats/#profiles">http://www.imagemagick.org/Usage/formats/#profiles</a></li>
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<li>Somehow we need to detect the color system being used by the input file and handle each case differently</li>
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<li>This is trivial with <code>identify</code> (even by the <a href="http://im4java.sourceforge.net/api/org/im4java/core/IMOps.html#identify">Java ImageMagick API</a>):</li>
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</ul>
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<pre><code>$ identify -format '%r\n' alc_contrastes_desafios.pdf\[0\]
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DirectClass CMYK
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$ identify -format '%r\n' Africa\ group\ of\ negotiators.pdf\[0\]
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DirectClass sRGB Alpha
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</code></pre>
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@ -36,7 +36,7 @@
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<p></p>
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<ul>
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<li>This results in discolored thumbnails, sRGB and CMYK:</li>
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<li>This results in discolored thumbnails when compared to the original PDF, for example sRGB and CMYK:</li>
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</ul>
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<p><img src="https://alanorth.github.io/cgspace-notes/cgspace-notes/2017/03/thumbnail-srgb.jpg" alt="Thumbnail in sRGB colorspace" /></p>
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@ -45,7 +45,29 @@
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<ul>
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<li>I filed an issue for the color space thing: <a href="https://jira.duraspace.org/browse/DS-3517">DS-3517</a></li>
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</ul></description>
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</ul>
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<h2 id="2017-03-03">2017-03-03</h2>
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<ul>
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<li>I created a patch for DS-3517 and made a pull request against upstream <code>dspace-5_x</code>: <a href="https://github.com/DSpace/DSpace/pull/1669">https://github.com/DSpace/DSpace/pull/1669</a></li>
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<li>Looks like <code>-colorspace sRGB</code> alone isn&rsquo;t enough, we need to use profiles:</li>
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</ul>
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<pre><code>$ convert -thumbnail 300x300 -flatten -profile /opt/brew/Cellar/ghostscript/9.20/share/ghostscript/9.20/iccprofiles/default_cmyk.icc -profile /opt/brew/Cellar/ghostscript/9.20/share/ghostscript/9.20/iccprofiles/default_rgb.icc alc_contrastes_desafios.pdf\[0\] alc_contrastes_desafios.pdf.jpg
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</code></pre>
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<ul>
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<li>This is a great resource describing the color stuff: <a href="http://www.imagemagick.org/Usage/formats/#profiles">http://www.imagemagick.org/Usage/formats/#profiles</a></li>
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<li>Somehow we need to detect the color system being used by the input file and handle each case differently</li>
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<li>This is trivial with <code>identify</code> (even by the <a href="http://im4java.sourceforge.net/api/org/im4java/core/IMOps.html#identify">Java ImageMagick API</a>):</li>
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</ul>
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<pre><code>$ identify -format '%r\n' alc_contrastes_desafios.pdf\[0\]
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DirectClass CMYK
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$ identify -format '%r\n' Africa\ group\ of\ negotiators.pdf\[0\]
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DirectClass sRGB Alpha
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</code></pre></description>
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</item>
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<item>
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@ -36,7 +36,7 @@
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<p></p>
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<ul>
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<li>This results in discolored thumbnails, sRGB and CMYK:</li>
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<li>This results in discolored thumbnails when compared to the original PDF, for example sRGB and CMYK:</li>
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</ul>
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<p><img src="https://alanorth.github.io/cgspace-notes/cgspace-notes/2017/03/thumbnail-srgb.jpg" alt="Thumbnail in sRGB colorspace" /></p>
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@ -45,7 +45,29 @@
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<ul>
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<li>I filed an issue for the color space thing: <a href="https://jira.duraspace.org/browse/DS-3517">DS-3517</a></li>
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</ul></description>
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</ul>
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<h2 id="2017-03-03">2017-03-03</h2>
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<ul>
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<li>I created a patch for DS-3517 and made a pull request against upstream <code>dspace-5_x</code>: <a href="https://github.com/DSpace/DSpace/pull/1669">https://github.com/DSpace/DSpace/pull/1669</a></li>
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<li>Looks like <code>-colorspace sRGB</code> alone isn&rsquo;t enough, we need to use profiles:</li>
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</ul>
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<pre><code>$ convert -thumbnail 300x300 -flatten -profile /opt/brew/Cellar/ghostscript/9.20/share/ghostscript/9.20/iccprofiles/default_cmyk.icc -profile /opt/brew/Cellar/ghostscript/9.20/share/ghostscript/9.20/iccprofiles/default_rgb.icc alc_contrastes_desafios.pdf\[0\] alc_contrastes_desafios.pdf.jpg
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</code></pre>
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<ul>
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<li>This is a great resource describing the color stuff: <a href="http://www.imagemagick.org/Usage/formats/#profiles">http://www.imagemagick.org/Usage/formats/#profiles</a></li>
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<li>Somehow we need to detect the color system being used by the input file and handle each case differently</li>
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<li>This is trivial with <code>identify</code> (even by the <a href="http://im4java.sourceforge.net/api/org/im4java/core/IMOps.html#identify">Java ImageMagick API</a>):</li>
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</ul>
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<pre><code>$ identify -format '%r\n' alc_contrastes_desafios.pdf\[0\]
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DirectClass CMYK
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$ identify -format '%r\n' Africa\ group\ of\ negotiators.pdf\[0\]
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DirectClass sRGB Alpha
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</code></pre></description>
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</item>
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<item>
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@ -35,7 +35,7 @@
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<p></p>
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<ul>
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<li>This results in discolored thumbnails, sRGB and CMYK:</li>
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<li>This results in discolored thumbnails when compared to the original PDF, for example sRGB and CMYK:</li>
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</ul>
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<p><img src="https://alanorth.github.io/cgspace-notes/cgspace-notes/2017/03/thumbnail-srgb.jpg" alt="Thumbnail in sRGB colorspace" /></p>
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@ -44,7 +44,29 @@
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<ul>
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<li>I filed an issue for the color space thing: <a href="https://jira.duraspace.org/browse/DS-3517">DS-3517</a></li>
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</ul></description>
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</ul>
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<h2 id="2017-03-03">2017-03-03</h2>
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<ul>
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<li>I created a patch for DS-3517 and made a pull request against upstream <code>dspace-5_x</code>: <a href="https://github.com/DSpace/DSpace/pull/1669">https://github.com/DSpace/DSpace/pull/1669</a></li>
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<li>Looks like <code>-colorspace sRGB</code> alone isn&rsquo;t enough, we need to use profiles:</li>
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</ul>
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<pre><code>$ convert -thumbnail 300x300 -flatten -profile /opt/brew/Cellar/ghostscript/9.20/share/ghostscript/9.20/iccprofiles/default_cmyk.icc -profile /opt/brew/Cellar/ghostscript/9.20/share/ghostscript/9.20/iccprofiles/default_rgb.icc alc_contrastes_desafios.pdf\[0\] alc_contrastes_desafios.pdf.jpg
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</code></pre>
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<ul>
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<li>This is a great resource describing the color stuff: <a href="http://www.imagemagick.org/Usage/formats/#profiles">http://www.imagemagick.org/Usage/formats/#profiles</a></li>
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<li>Somehow we need to detect the color system being used by the input file and handle each case differently</li>
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<li>This is trivial with <code>identify</code> (even by the <a href="http://im4java.sourceforge.net/api/org/im4java/core/IMOps.html#identify">Java ImageMagick API</a>):</li>
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</ul>
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<pre><code>$ identify -format '%r\n' alc_contrastes_desafios.pdf\[0\]
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DirectClass CMYK
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$ identify -format '%r\n' Africa\ group\ of\ negotiators.pdf\[0\]
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DirectClass sRGB Alpha
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</code></pre></description>
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</item>
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<item>
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