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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>ccxxmake</title>
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<meta http-equiv="content-type" content="text/html;
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<meta name="author" content="Graeme Gill">
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<h2><b>spectro/ccxxmake</b></h2>
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For Colorimeters that rely on a calibration matrix, <span
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style="font-weight: bold;">ccxxmake</span> allows creation of a
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correction matrix file (<a href="File_Formats.html#.ccmx">ccmx</a>)
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for a particular <span style="font-weight: bold;">Colorimeter &
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Display</span> combination, by making use a reference <span
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style="font-weight: bold;">Spectrometer</span> or Colorimeter
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instrument. This can then be used to improve the accuracy of
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subsequent measurements with that Colorimeter on that Display by
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using it with the <a href="dispcal.html#X">dispcal</a>, <a
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href="dispread.html#X">dispread</a> and <a href="spotread.html#X">spotread</a>
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-X option. See <a href="WideGamutColmters.html">Wide Gamut Displays
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and Colorimeters</a> for more information on why this may be
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useful. <span style="font-weight: bold;">Note</span> that to make
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use of a colorimeter as a CCMX reference, you will have to provide
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two .ti3 files rather than using interactive measurement- see <a
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href="#f"><span style="font-weight: bold;">-f</span></a>.<br>
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For Colorimeters that have sensor spectral sensitivity calibration
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information built into them (ie. the X-Rite <span
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style="font-weight: bold;">i1d3</span>, and<span
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style="font-weight: bold;"><span style="font-weight: bold;"></span></span>
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DataColor <span style="font-weight: bold;">Spyder4</span>), <span
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style="font-weight: bold;">ccxxmake</span> allows a creation of a
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calibration spectral sample (<a href="File_Formats.html#.ccss">ccss</a>)
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for a particular <span style="font-weight: bold;">Display</span>,
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by making use a reference <span style="font-weight: bold;">Spectrometer</span>
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instrument. This can then be used to improve the accuracy of
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subsequent measurements on that Display using such Colorimeters, by
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using it with the <a href="dispcal.html#X">dispcal</a>, <a
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href="dispread.html#X">dispread</a> and <a href="spotread.html#X">spotread</a>
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There is a <a href="ccmxs.html">list of contributed</a> <span
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style="font-weight: bold;">ccmx</span> (Colorimeter Correction
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<h3>Usage Summary</h3>
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<small style="font-family: monospace;">ccxxmake [-options]
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</small><small style="font-family: monospace;"> <a href="#v">-v</a>
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Verbose mode</small><br>
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<a href="#S">-S</a>
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<a href="#f">-f file1.ti3[,file2.ti3]</a>
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.ti3 files rather than measure.<br style="font-family: monospace;">
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<span style="font-family: monospace;"> </span><font
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style="font-family: monospace;" size="-1"><a href="#display">-display
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displayname</a> [X11 only] Choose X11 display name</font><br
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style="font-family: monospace;">
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<font style="font-family: monospace;" size="-1"></font><font
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style="font-family: monospace;" size="-1"> <a href="#dnm">-d
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[X11 only] Choose the display from the following list (default 1),</font><br
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style="font-family: monospace;">
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<font style="font-family: monospace;" size="-1">
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for VideoLUT access.</font><br style="font-family: monospace;">
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<font style="font-family: monospace;" size="-1"> <a href="#d">-d
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n</a>
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(default 1)</font><br>
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<span style="font-family: monospace;"> <a href="#dweb">-dweb[:port]</a>
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Display via a web server at port (default 8080)</span><br
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style="font-family: monospace;">
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<font style="font-family: monospace;" size="-1"> </font><font
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style="font-family: monospace;" size="-1"><a href="#p">-p</a>
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Use projector mode (if available)</font><br style="font-family:
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<font size="-1"><span style="font-family: monospace;"><a
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Display type - instrument specific list to choose from.</span></font><font
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style="font-family: monospace;" size="-1"> (CCMX)</font><br
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style="font-family: monospace;">
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<font style="font-family: monospace;" size="-1"> <a href="#P">-P
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ho,vo,ss</a>
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Position test window and scale it</font><br style="font-family:
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<font style="font-family: monospace;" size="-1">
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1.0 = right/bottom etc.</font><br style="font-family: monospace;">
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<font style="font-family: monospace;" size="-1">
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2.0 = double etc.</font><br style="font-family: monospace;">
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<font style="font-family: monospace;" size="-1"> </font><font
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style="font-family: monospace;" size="-1"><a href="#F">-F</a>
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Fill whole screen with black background</font><br
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style="font-family: monospace;">
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<small style="font-family: monospace;"> <span
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style="text-decoration: underline;"></span><a href="#n">-n</a>
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</small><font style="font-family: monospace;" size="-1"> <a
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href="#N">-N</a>
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Disable auto calibration of instrument</font><small
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style="font-family: monospace;"><br>
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</small><span style="font-family: monospace;"> </span><font
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style="font-family: monospace;" size="-1"><a href="#H">-H</a>
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Use high resolution spectrum mode (if available)<br>
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</font><font style="font-family: monospace;" size="-1"> <a
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Use adaptive measurement mode (if
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available)</font><br style="font-family: monospace;">
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<font style="font-family: monospace;" size="-1"> <a href="#C">-C
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"command"</a>
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Invoke shell "command" each time a color is set<br>
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</font><small style="font-family: monospace;"> <a href="#o">-o
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<i>observ</i></a>
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Choose CIE Observer for CCMX spectral
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1931_2 </small><small
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style="font-family: monospace;"> (def.)</small><small
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style="font-family: monospace;">, 1964_10, S&B 1955_2, shaw,
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</small><font style="font-family: monospace;" size="-1"> <a
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href="#s">-s steps</a>
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combination steps (default 3)</font><br style="font-family:
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<font style="font-family: monospace;" size="-1"> <a href="#W">-W
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n|h|x</a>
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none, h = HW, x = Xon/Xoff</font><br style="font-family:
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<small style="font-family: monospace;"> <a href="#D">-D [level]</a>
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Print
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debug diagnostics to stderr<br>
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</small><small style="font-family: monospace;"> <a
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href="ccxxmake.html#E">-E "description"</a>
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escription</small><br>
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<small style="font-family: monospace;"> <a href="#I">-I
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"displayname"</a> </small><span
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style="font-family: monospace;">Set display make and model
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description</span><small style="font-family: monospace;"><br>
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</small><small style="font-family: monospace;"><a href="#T">-T
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"displaytech"</a> </small><span
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style="font-family: monospace;">Set display technology description</span>
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(ie. CRT, LCD etc.)<small style="font-family: monospace;"></small><br
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style="font-family: monospace;">
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<span style="font-family: monospace;"> </span><font
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style="font-family: monospace;" size="-1"><a href="#file1"><span
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style="font-style: italic;">correction.ccmx</span></a> | <a
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href="#file2"></a></font><font style="font-family: monospace;"
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size="-1"><a href="ccxxmake.html#file2">calibration.ccss</a></font><font
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style="font-family: monospace;" size="-1"><br>
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File to save result to.</font><br>
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<h3>Usage Details and Discussion</h3>
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<a name="v"></a>The <b>-v</b> flag causes extra information to be
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printed out during chartread operation.<br>
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<a name="S"></a><span style="font-weight: bold;">-S</span> By
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default a Colorimeter Correction Matrix (<span style="font-weight:
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bold;">CCMX</span>) will be created from both <span
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style="font-weight: bold;">Colorimeter</span> and <span
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style="font-weight: bold;">Spectrometer</span> readings, which
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allows correction for errors with a particular Colorimeter and
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Display combination. If the <span style="font-weight: bold;">-S</span>
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flag is used, then instead a Colorimeter Calibration Spectral Set (<span
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style="font-weight: bold;">CCSS</span>) file is created from just
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the <span style="font-weight: bold;">Spectrometer</span> readings,
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that allows calibrating any suitable Colorimeter to the Display.<br>
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<a name="f"></a><span style="font-weight: bold;">-f <span
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style="font-style: italic;">file1.ti3[,file2.ti3]</span></span>
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By <span style="text-decoration: underline;">default</span> <span
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style="font-weight: bold;">ccxxmake</span> creates a <span
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style="font-weight: bold;">CCMX</span> file by displaying test
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patches on the screen, and then prompting you to measure them
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interactively with the two instruments. An alternative is to create
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a small number of test values using <span style="font-weight:
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bold;">targen</span> suitable for display profiling (or use the <span
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style="font-weight: bold;">ref/ccxx.ti1</span> file provided with
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ArgyllCMS), and then measure them with the two instruments using <span
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style="font-weight: bold;">dispread</span> to create a reference
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and target .ti3 files, and then provide the two files as arguments
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to <span style="font-weight: bold;">ccxxmake -f</span>. Normally
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the reference file will be created using a spectral instrument and
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you will want to use the <span style="font-weight: bold;">-s</span>
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flag with dispread for this. If you want to use a colorimeter as a
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reference instrument, then make sure that it is the first file
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provided to the ccxxmake <span style="font-weight: bold;">-f</span>
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option. The filenames should be concatenated with a <span
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style="font-weight: bold;">","</span> separator without spaces.
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You will also have to supply a display name using the <span
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style="font-weight: bold;">-I</span> option and/or technology
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description using <span style="font-weight: bold;">-T</span>.<br>
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When creating a <span style="font-weight: bold;">CCSS</span> file,
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only spectral readings from the display measured with the reference
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instrument are needed, and a single <span style="font-weight:
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bold;">.ti3</span> file should be provided.<br>
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<a name="display"></a>When running on a UNIX based system that used
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the X11 Windowing System, <b>ccxxmake</b> will by default use the
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$DISPLAY environment variable to determine which display and screen
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to read from. This can be overridden by supplying an X11 display
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name to the <span style="font-weight: bold;">-display</span>
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option. Note that if Xinerama is active, you can't select the screen
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using $DISPLAY or -display, you have to select it using the <span
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style="font-weight: bold;">-d</span> parameter.<br>
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<a name="d"></a> By default the main display will be the location of
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the test window. If the system has more than one display or screen,
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an alternate display/screen can be selected with the <span
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style="font-weight: bold;">-d</span> parameter. If you invoke <b>ccxxmake</b>
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so as to display the usage information (i.e. "dispcal -?" or
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"dispcal --"), then the discovered displays/screens will be listed.
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Multiple displays may not be listed, if they appear as a single
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display to the operating system (ie. the multi-display support is
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hidden in the video card driver). On UNIX based system that used the
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X11 Windowing System, the <span style="font-weight: bold;">-d</span>
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parameter will override the screen specified by the $DISPLAY or
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<a name="dnm"></a>Because of the difficulty cause by TwinView and
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MergedFB in X11 based systems, you can optionally specify a separate
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display number after the display that is going to be used to present
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test patches, for accessing the VideoLUT hardware. This must be
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specified as a single string, e.g. <span style="font-weight: bold;">-d
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1,2</span> . Some experimentation may be needed using <a
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href="dispwin.html">dispwin</a> on such systems, to discover what
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screen has access to the VideoLUT hardware, and which screens the
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test patches appear on.<br>
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<span style="font-weight: bold;"><a name="dweb"></a>-dweb</span> or
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<span style="font-weight: bold;">-dweb:port</span> starts a
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standalone web server on your machine, which then allows a local or
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remote web browser to display the the color test patches. By default
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port <span style="font-weight: bold;">8080</span> is used, but this
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can be overridden by appending a <span style="font-weight: bold;">:</span>
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and the port number i.e. <span style="font-weight: bold;">-dweb:8001</span>.
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The URL will be <span style="font-weight: bold;">http://</span>
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then name of the machine or its I.P. address followed by a colon and
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the port number - e.g something like <span style="font-weight:
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bold;">http://192.168.0.1:8080</span>. If you use the verbose
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option (<span style="font-weight: bold;">-v</span>) then a likely
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URL will be printed once the server is started, or you could run <span
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style="font-weight: bold;">ipconfig</span> (MSWin) or <span
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style="font-weight: bold;">/sbin/ifconfig</span> (Linux or OS X)
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and identify an internet address for your machine that way.<br>
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<a name="p"></a>The <span style="font-weight: bold;">-p</span> flag
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allows measuring in projector mode, using instruments that support
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<a name="y"></a> The <span style="font-weight: bold;">-y</span>
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flag allows setting the Display Type (CCMX creation). Most
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colorimeters need this parameter set to operate correctly. The
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selection typically determines two aspects of of the instrument
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operation: <span style="font-weight: bold;">1)</span> It may set
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the measuring mode to suite <a
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href="http://en.wikipedia.org/wiki/Comparison_of_display_technology"><span
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style="font-weight: bold;">refresh</span> or <span
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style="font-weight: bold;">non-refresh</span> displays</a>.
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Typically only LCD (Liquid Crystal) displays have a non-refresh
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nature. <span style="font-weight: bold;">2)</span> It may select an
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instrument calibration matrix suitable for a particular display
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type. The selections available depends on the type and model of
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instrument, and a list of the options for the discovered instruments
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will be shown in the <a href="ArgyllDoc.html#CmdLine">usage</a>
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information. For more details on what particular instruments support
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and how this works, see <a href="instruments.html">Operation of
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particular instruments</a>. Any CCMX created will work on top of
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the Display Type, so to be valid, the same Display Type must be
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selected whenever the CCMX is used with this instrument.<br>
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<a name="P"></a> The <span style="font-weight: bold;">-P</span>
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parameter allows you to position and size the test patch window. By
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default it is places in the center of the screen, and sized
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appropriately for the type of instrument. The <span
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style="font-weight: bold;">ho</span> and <span
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style="font-weight: bold;">vo</span> values govern the horizontal
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and vertical offset respectively. A value of 0.0 positions the
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window to the far left or top of the screen, a value of 0.5
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positions it in the center of the screen (the default), and 1.0
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positions it to the far right or bottom of the screen. The <span
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style="font-weight: bold;">ss</span> parameter is a scale factor
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for the test window size. A value of 0.5 for instance, would produce
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a half sized window. A value of 2.0 will produce a double size
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window. Note that the ho,vo,ss numbers must be specified as a single
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string (no space between the numbers and the comma).<br>
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For example, to create a double sized test window at the top right
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of the screen, use <span style="font-weight: bold;">-P 1,0,2</span>
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<a name="F"></a> The <span style="font-weight: bold;">-F</span>
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flag causes the while screen behind the test window to be masked
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with black. This can aid black accuracy when measuring CRT displays
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<a name="n"></a><span style="font-weight: bold;">-n</span> When
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running on a UNIX based system that used the X11 Windowing System, <b>dispcal</b>
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normally selects the override redirect so that the test window will
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appear above any other windows on the display. On some systems this
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can interfere with window manager operation, and the <b>-n</b>
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option turns this behaviour off.<br>
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<a name="N"></a>The <b>-N</b> option disables the automatic
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calibration of an instrument if it is possible to do so. Sometimes
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it is awkward to have to re-calibrate and instrument every time a
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tool starts, and unnecessary if the instrument has recently been
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calibration, and this switch prevents it happening.<br>
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<a name="L"></a> The -<span style="font-weight: bold;">H</span>
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option on high resolution spectral mode, if the instrument supports
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it, such as the Eye-One Pro. See <a href="instruments.html">Operation
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of particular instruments</a> for more details. This may give
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better accuracy for display measurements.<br>
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<a name="V"></a> The -<span style="font-weight: bold;">V</span>
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option uses adaptive emission measurement mode, if the instrument
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supports it, such as the Eye-One Pro. This may give better accuracy
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for low level measurements, but may be more inconsistent overall due
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to the varying integration times. Overall measurement time will
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probably be longer.<br>
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<a name="C"></a> The -<span style="font-weight: bold;">C</span> <span
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style="font-weight: bold;">"command" </span>option allows a
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method of relaying each test value to some other display than that
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on the system running dispcal (for instance, a photo frame, PDA
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screen etc.), by causing the given command to be invoked to the
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shell, with six arguments. The first three arguments are the RGB
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test color as integers in the range 0 to 255, the second three
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parameters are the RGB test color as floating point numbers in the
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range 0.0 to 1.0. The script or tool should relay the given color to
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the screen in some manner (e.g. by generating a raster file of the
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given color and sending it to the display being profiled), before
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returning. Note that a test window will also be created on the
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system running dispread.<br>
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<a name="o"></a> (CCMX creation) The <b>-o</b> flag allows
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specifying a tristimulus observer, and is used to compute
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tristimulus values from spectral readings. The following
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choices are available:<br>
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<b> 1931_2</b> selects the standard CIE 1931 2 degree
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observer. The default.<br>
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<b>1964_10</b> selects the standard CIE 1964 10 degree
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<b>1955_2</b> selects the Stiles and Birch 1955 2 degree
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<b>1978_2 </b>selects the Judd and Voss 1978 2 degree
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<b>shaw</b> selects the Shaw and Fairchild 1997 2 degree
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<a name="s"></a>The <b>-s steps</b><span style="font-weight: bold;"></span>
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parameter overrides the default number of test patch combination
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steps used in measuring a colorimeter & display combination.<span
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style="font-weight: bold;"></span><span style="font-weight: bold;"></span><span
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style="font-weight: bold;"></span> The steps are those out
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of every combination of R,G & B values of the given number of
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steps that have at least one colorant at 100%. So 2 steps gives 7
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test patches, 3 gives 19, 4 gives 37, 5 gives 61, 6 gives 91 etc.
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Note that typically this won't make much difference to the resulting
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calibration, since it depends primarily on the underlying spectral
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characteristics of the display.<br>
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<a name="W"></a>The <b>-W</b> <span style="font-weight: bold;">n|h|x</span>
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parameter overrides the default serial communications flow control
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setting. The value <span style="font-weight: bold;">n</span> turns
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all flow control off, <span style="font-weight: bold;">h</span>
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sets hardware handshaking, and <span style="font-weight: bold;">x</span>
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sets Xon/Xoff handshaking. This commend may be useful in workaround
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serial communications issues with some systems and cables. <br>
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<a name="D"></a>The <b>-D</b> flag causes communications and other
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instrument diagnostics to be printed to stdout. A level can be set
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between 1 .. 9, that may give progressively more verbose
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information, depending on the instrument. This can be useful in
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tracking down why an instrument can't connect.<br>
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<a name="E"></a>The <b>-E</b> parameter allows overriding the <span
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style="font-weight: bold;">ccmx/ccss</span> files overall
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description tag. Normally this is not necessary. With most command
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line shells, it will be necessary to enclose the parameter with
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double quotes, so that spaces and other special characters are
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included in the parameter, and not mistaken for the start of another
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flag, or as a final command line parameter. <br>
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<a name="I"></a>The <b>-I</b> parameter allows setting of the
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display description string in the resulting <span
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style="font-weight: bold;">ccmx/ccss</span> file. Since the
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default display description is probably very generic, it is <span
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style="font-weight: bold;">highly recommended</span> that a
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description of the make and model of the display be provided here,
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or set a display technology description using <span
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style="font-weight: bold;">-T</span> (see below). The default or
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given display description will be printed before the menu. With most
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command line shells, it will be necessary to enclose the parameter
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with double quotes, so that spaces and other special characters are
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included in the parameter, and not mistaken for the start of another
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flag, or as a final command line parameters.<br>
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<a name="I"></a>The <b>-T</b> parameter allows setting of the
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display technology description string in the resulting <span
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style="font-weight: bold;">ccmx/ccss</span> file. The
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applicability of the calibration mainly depends on the technology
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type of the display, so a description of the technology (ie. "CRT",
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"LCD", "LCD + backlight type + LCD type", etc.) is <span
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style="font-weight: bold;">highly recommended</span>, because it
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can make the calibration more widely usable. With most command line
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shells, it will be necessary to enclose the parameter with double
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quotes, so that spaces and other special characters are included in
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the parameter, and not mistaken for the start of another flag, or as
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a final command line parameters.<br>
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<a name="file1"></a>The <span style="font-weight: bold; font-style:
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italic;">correction.ccmx</span> is the name of the file to save
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the resulting <a href="File_Formats.html#.ccmx">Colorimeter
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Correction Matrix</a> to. It is best to give it a short but
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informative name that includes the Colorimeter model and the display
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make and model. By convention it should have a <span
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style="font-weight: bold;">.ccmx</span> file extension.<br>
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<a name="file2"></a>The <span style="font-weight: bold; font-style:
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italic;">correction.ccss</span> is the name of the file to save
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the resulting <a href="File_Formats.html#.ccss">Colorimeter
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Calibration Spectral Samples</a> to. It is best to give it a short
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but informative name that includes the display technology or model.
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By convention it should have a <span style="font-weight: bold;">.ccss</span>
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If you are going to use the same CCMX or CCSS file all the time,
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then you may want to set the <a href="Environment.html">ARGYLL_COLMTER_CAL_SPEC_SET</a>
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environment variable.<br>
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<hr style="width: 100%; height: 2px;">
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<h3>Instrument Communications:</h3>
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Unlike the other measurement utilities,<span style="font-weight:
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bold;"> ccxxmake</span> doesn't connect to the instrument until it
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is about to make a measurement. This allows for the possibility of
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using a different instrument for each measurement.<br>
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It will display a menu:<span style="font-style: italic;"></span><br>
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1) Select an instrument, Currently 1 'usb:/bus4/dev2/ (GretagMacbeth
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2) Measure test patches with current instrument<br>
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3) [ Compute Colorimeter Correction Matrix & save it ]<br>
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For creating a CCMX there are two measurements to be made, after
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which the correction matrix can be computed and saved. Before each
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measurement, the instrument may need calibrating. For creating a
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CCSS a single measurement is needed.<br>
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A spectral measurement using a spectral instrument is always
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A measurement using the Colorimeter that the correction matrix
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is being created for is needed in the case of creating a CCMX, but <span
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style="font-weight: bold;">not</span> needed when creating a CCSS.<br>
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There will be a message before the menu indicating which of the
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measurements has been completed.<br>
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<hr style="width: 100%; height: 2px;">
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<h4>Display Setup:</h4>
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Because ccmx/ccss is measuring spectral matching, the exact levels
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of each channel is not important, so the display settings or
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calibration state shouldn't make any difference to the result, as
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long as it is the same for the readings of both instruments.
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Similarly, the number and variety of test patches shouldn't make a
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huge difference, as long as there is at least Red, Green, Blue and
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White test patches.<br>
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doc/ccxxmake.html
