<page xmlns="http://projectmallard.org/1.0/" type="topic" id="load-ccmx">

  <info>
    <link type="guide" xref="index"/>
    <desc>Loading a custom color correction matrix onto the device.</desc>
    <credit type="author">
      <name>Richard Hughes</name>
      <email>richard@hughsie.com</email>
    </credit>
    <include href="legal.xml" xmlns="http://www.w3.org/2001/XInclude"/>
  </info>

  <title>Loading a CCMX</title>
  <p>
    A color correction matrix file (known as a CCMX) is a 3x3 matrix with some
    extra metadata that allows the ColorHug to measure display types that it
    was not calibrated against.
    Many people have shared thier correction matricies with the community,
    which allows the colorimeter to return more accurate readings for a specific
    display technology.
  </p>
  <p>
    If the default Factory Calibration matrix produces results that have a heavy
    color cast, try to choose another display matrix that is a closer match
    to your hardware.
    You will need to select a different matrix if you have a wide gamut or LED
    display, although the default matrix usually produces good results.
  </p>
  <note style="advanced">
    <p>
      All colorimeter devices from different vendors need a set of CCMX files
      as tristimulus colorimeters by definition can only measure one set of
      device primaries.
    </p>
  </note>

  <p>
    Use the <guiseq><gui>Applications</gui><gui>System Tools</gui><gui>CCMX Loader</gui></guiseq>
    tool to load new CCMX files.
  </p>

  <figure>
    <title>Load CCMX matrices onto the device</title>
    <media type="image" src="colorhug-ccmx.png"/>
  </figure>

  <note style="tip">
    <p>
      If the computer is connected to the Internet you can click the
      <gui>Refresh</gui> button to download all the community contributed
      files, which will then be selectable for each display type.
    </p>
  </note>

</page>
