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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>iccgamut</title>
    <meta http-equiv="content-type" content="text/html;
      charset=windows-1252">
    <meta name="author" content="Graeme Gill">
  </head>
  <body>
    <h2><b>xicc/iccgamut</b></h2>
    <br>
    Create a gamut file or X3DOM file &nbsp;of the color gamut of an ICC
    profile.<br>
    <span style="font-weight: bold;"> iccgamut</span> allows creation of
    gamut files from the forward or backwards table of an ICC profile,
    in Lab or CIECAM02 Jab colorspace, and can also representing the
    gamut as a X3DOM file.<br>
    <br>
    See <a href="3dformat.html">3D Viewing
      Format</a> for switching to VRML or X3D output format.<br>
    <h3>Usage<br>
    </h3>
    <small><span style="font-family: monospace;">iccgamut [-options] </span><i
        style="font-family: monospace;">profile</i><br
        style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;-v&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;





        Verbose</span><br style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;-d
        sres&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Surface resolution
        details 1.0 - 50.0</span><br style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;-w&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
emit

        X3DOM .x3d.html file as well as CGATS .gam file</span><br
        style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;-n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Don't





        add X3DOM axes or white/black point</span><br
        style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;-k&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Add

        X3DOM markers for prim. &amp; sec. "cusp" points</span><br
        style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;-f
        function&nbsp;&nbsp; f = forward*, b = backwards</span><br
        style="font-family: monospace;">
      &nbsp; <span style="font-family: monospace;"></span></small><small><span
        style="font-family: monospace;">-i
        intent&nbsp;&nbsp;&nbsp;&nbsp; p = perceptual, r = relative
        colorimetric,</span><br style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
s





        = saturation, a = absolute (default), d = profile default</span></small><small><span
        style="font-family: monospace;"></span></small><br
      style="font-family: monospace;">
    <small><span style="font-family: monospace;"></span><span
        style="font-family: monospace;">&nbsp;-o
        order&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; n = normal (priority: lut
        &gt; matrix &gt; monochrome)</span><br style="font-family:
        monospace;">
      <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
r





        = reverse (priority: monochrome &gt; matrix &gt; lut)<br>
      </span></small><small><span style="font-family: monospace;">&nbsp;</span><span
        style="font-family: monospace;">-p oride</span><span
        style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; l
        = Lab_PCS (default), j = CIECAM02 Appearance Jab</span></small><small><span
        style="font-family: monospace;"></span><span style="font-family:
        monospace;"></span><br style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;-l
        tlimit&nbsp;&nbsp;&nbsp;&nbsp; set total ink limit, 0 - 400%
        (estimate by default)</span><br style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;-L
        klimit&nbsp;&nbsp;&nbsp;&nbsp; set black ink limit, 0 - 100%
        (estimate by default)</span><br style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;-c
        viewcond&nbsp;&nbsp; set viewing conditions for CIECAM02,</span><br
        style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
either





        an enumerated choice, or a series of parameters:value changes</span><br
        style="font-family: monospace;">
      <span style="font-family: monospace;"></span></small><small><span
        style="font-family: monospace;">&nbsp; &nbsp; &nbsp; &nbsp;
        &nbsp; &nbsp; pp - Practical Reflection Print (ISO-3664 P2)</span><br
        style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;





        &nbsp; pe - Print evaluation environment (CIE 116-1995)<br>
      </span></small><small><span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;





        &nbsp; pc - Critical print evaluation environment (ISO-3664 P1)</span></small><small><span
        style="font-family: monospace;"></span><span style="font-family:
        monospace;"></span><br style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;





        &nbsp; &nbsp; mt - Monitor in typical work environment</span><br
        style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;





        &nbsp; mb - Monitor in bright work environment</span><br
        style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp; &nbsp;
        &nbsp; &nbsp;&nbsp;&nbsp; md - Monitor in darkened work
        environment</span><br style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp; &nbsp;
        &nbsp; &nbsp;&nbsp;&nbsp; jm - Projector in dim environment</span><br
        style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp; &nbsp;
        &nbsp; &nbsp;&nbsp;&nbsp; jd - Projector in dark environment</span><br
        style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;
        &nbsp; &nbsp;&nbsp;&nbsp; pcd - Photo CD - original scene
        outdoors</span><br style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp; &nbsp;
        &nbsp; &nbsp;&nbsp;&nbsp; ob - Original scene - Bright Outdoors</span><br
        style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp; &nbsp;
        &nbsp; &nbsp;&nbsp;&nbsp; cx - Cut Sheet Transparencies on a
        viewing box</span></small><small><span style="font-family:
        monospace;"></span><span style="font-family: monospace;"></span><br
        style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
s:surround&nbsp;&nbsp;





        n = auto, a = average, m = dim, d = dark,</span><br
        style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;





        &nbsp; &nbsp;&nbsp; c = transparency (default average)</span><br
        style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
w:X:Y:Z&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;





        Adapted white point as XYZ (default media white)</span><br
        style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
w:x:y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;





        Adapted white point as x, y</span><br style="font-family:
        monospace;">
      <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
a:adaptation





        Adaptation luminance in cd.m^2 (default 50.0)</span><br
        style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
b:background
Background





        % of image luminance (default 20)<br>
        &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; l:imagewhite Image
        white in cd.m^2 if surround = auto (default 250)</span></small><br
      style="font-family: monospace;">
    <small><span style="font-family: monospace;"><small><span
            style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
f:flare&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;





            Flare light % of image luminance (default 0)<br>
          </span></small>&nbsp;</span><span style="font-family:
        monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        g:glare&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Glare light % of ambient
        (default 5)</span><br style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;




        g:X:Y:Z&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Glare color as XYZ
        (default media white)</span><br style="font-family: monospace;">
      <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;




        g:x:y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Glare color as
        x, y<br>
        &nbsp;-s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Create





        special cube surface topology plot<br style="font-family:
          monospace;">
      </span><i style="font-family: monospace;">profile</i><span
        style="font-family: monospace;"> &nbsp; &nbsp; &nbsp;
        &nbsp;&nbsp; The name of the </span><a style="font-family:
        monospace;" href="File_Formats.html#ICC">ICC</a><span
        style="font-family: monospace;"> profile, as well as the
        basename of the </span><a style="font-family: monospace;"
        href="File_Formats.html#.gam">gamut</a><span style="font-family:
        monospace;"> [.gam] and/or </span><a style="font-family:
        monospace;" href="File_Formats.html#X3DOM">X3DOM</a><span
        style="font-family: monospace;"> [.x3d.html] file.</span></small>
    <br>
    <h3>Comments</h3>
    The parameters are all those that control which table in the ICC
    profile to use, as well as what color space to convert it to. <br>
    <br>
    The<b> -v</b> flag dumps out the ICC profile header information.
    Using <b>-v</b> <b>-w</b> will also print the gamut volume in
    cubic L*a*b* units.<br>
    <br>
    The <b>-d</b> parameter controls the level of detail displayed in
    the surface. The parameter roughly corresponds to a deltaE value, so
    smaller values give greater detail. The default value is around 10,
    and is a good place to start. Small values may take a lot of time to
    generate, and will produce big files.<br>
    <br>
    The <b>-w</b> flag causes a X3DOM file to be produced, as well as a
    gamut file.<br>
    <br>
    The <b>-n</b> flag suppresses the L*a*b* axes being created in the
    X3DOM.<br>
    <br>
    The <span style="font-weight: bold;">-k</span> flag adds markers
    for each of the primary and secondary "cusp" points (Red, Yellow,
    Green, Cyan, Blue &amp; Magenta). No markers will be displayed if
    the cusps cannot be determined.<br>
    <br>
    The <b>-f </b>parameter allows choosing the ICC table to be used
    in plotting the gamut. The backwards tables generally incorporate
    gamut compression, and therefore don't reflect the native
    capabilities of the device.<br>
    <br>
    The <b>-i</b> flag selects the intent transform used for a lut
    based profile. It also selects between relative and absolute
    colorimetric for non-lut base profiles. Note that anything other
    than colorimetric may not represent the native capabilities of the
    device. The default intent will be absolute colorimetic for L*a*b*
    output, and CIECAM02 appearance for Jab output.<br>
    <br>
    An ICC profile is allowed to contain more than the minimum number of
    elements or table needed to describe a certain transform, and may
    contain redundant descriptions. &nbsp;By default, lut based table
    information will be used first if present, followed by matrix/shaper
    information, and only using monochrome information if it is all that
    is present. The <b>-o</b> flag, reverses this
    order.&nbsp;&nbsp;&nbsp; <br>
    <br>
    <span style="font-weight: bold;">-p</span>: By default the gamut
    will be created in L*a*b* colorspace. If&nbsp; <span
      style="font-weight: bold;">-pj</span> is selected, then CIECAM02
    appearance space Jab will be used for the output, and the viewing
    conditions will be taken into account. Jab space is what is normally
    needed to be compatible with the default intents used in <a
      href="colprof.html">colprof</a>. <span style="font-weight: bold;"><br>
    </span>Note that the CIECAM02 output space selection by default uses
    the colorimetric transform of the profile resulting in the
    appearance of the native device, but that the perceptual or
    saturation transforms may be used by selecting them using the <span
      style="font-weight: bold;">-i</span> parameter, which may give a
    different result with some profiles. This may be desirable if an
    image is to be transformed through the perceptual or saturation
    tables of a profile as part of a link with an Argyll generated
    output profile, since it will then represent the apparent gamut of
    the image when subject to these tables. If the absolute colorimetric
    intent is chosen using <span style="font-weight: bold;">-ia</span>
    in combinations with <span style="font-weight: bold;">-pj</span>,
    then&nbsp; Jab with a fixed white reference is used, which emulates
    an absolute CIECAM02 Jab appearance space. <br>
    <br>
    The <b>-l</b> parameter allows setting a total ink limit (TAC) for
    printing devices. If a device has a total ink limit, and hasn't been
    characterised with device values above this limit, then plotting the
    gamut in these areas will almost certainly be misleading. tables. By
    default, a total ink limit will be estimated from the profile
    tables. The ink limit will be in final calibrated device values if
    the profile includes calibration information.<br>
    <br>
    The <b>-L</b> parameter allows setting a black ink limit for
    printing devices. If a device is to be used with a black ink limit,
    then it is useful to evaluate the gamut with the limit in place. By
    default, a black ink limit will be estimated from the profile
    tables. The ink limit will be in final calibrated device values if
    the profile includes calibration information.<br>
    <br>
    The <b>-c</b> parameter allows setting the CIECAM02 viewing
    conditions, either by choosing a typical viewing environment, or
    controlling particular viewing condition parameters.<br>
    <br>
    The <span style="font-weight: bold;">-s</span> flag creates a
    special hyper-cube surface plot that is artificially colored. This
    can be useful for identifying the topology of the black ink color
    response.<br>
    <h3>Example<br>
    </h3>
    To create a view in L*a*b* of the absolute gamut of a CMYK file with
    an ink limit of 260%, one might use:<br>
    <br>
    &nbsp;&nbsp;&nbsp; <span style="font-style: italic;">iccgamut -w
      -ff -ia -l260 profile.icm</span><br>
    <br>
    and the resulting files will be <span style="text-decoration:
      underline;">profile.gam</span> and <span style="text-decoration:
      underline;">profile.x3d.html</span>.<br>
    <br>
    To create a gamut suitable for CIECAM02&nbsp; gamut mapping space in
    colprof or collink, something like<br>
    <br>
    &nbsp;&nbsp;&nbsp; iccgamut -ir -pj -cmt&nbsp; profile.icm<br>
    <br>
    where the viewing conditions "mt" should the same as the source
    conditions in colprof or collink.<br>
    <br style="font-weight: bold;">
    <span style="font-weight: bold;"></span><br>
    <br>
    <br>
    <br>
    <br>
    <br>
    <br>
  </body>
</html>