File: xicclu.html

package info (click to toggle)
argyll 2.3.1%2Brepack-1.1
links: PTS, VCS
area: main
in suites: bookworm
size: 40,432 kB
sloc: ansic: 399,505; javascript: 36,570; xml: 1,551; sh: 674; makefile: 604
file content (1112 lines) | stat: -rwxr-xr-x 35,787 bytes
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>xicclu</title>
    <meta http-equiv="content-type" content="text/html;
      charset=windows-1252">
    <meta name="author" content="Graeme Gill">
  </head>
  <body>
    <h2><b>xicc/xicclu</b>&nbsp; </h2>
    <h3>Summary&nbsp;<br>
    </h3>
    Lookup individual color values forward or inverted though an ICC
    profile table or CAL file. <b>xicclu</b> is the analogue of the
    icclib tool <a href="icclu.html">icclu</a>, but expands the
    capability to reverse lookup the Lut tables, and displaying PCS
    values in CIECAM02 Jab space. <b>xicclu</b> can also be used to
    plot the device value composition down the neutral axis for device
    profiles, or CAL file contents.<br>
    <br>
    Few of the options that apply to ICC profiles apply to CAL files,
    although device value options such as <b>-e</b> or <b>-E</b> will
    work. To lookup inverted CAL values, use <b>-f b</b>.<br>
    <h3>Usage Summary</h3>
    &nbsp;<span style="font-family: monospace;">xicclu [-</span><i
      style="font-family: monospace;">options</i><span
      style="font-family: monospace;">] profile_or_cal</span><br
      style="font-family: monospace;">
    <span style="font-family: monospace;">&nbsp;</span><a
      style="font-family: monospace;" href="#v">-v level</a><span
      style="font-family: monospace;"> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
      Verbosity level 0 - 2 (default = 1)<br style="font-family:
        monospace;">
    </span> <span style="font-family: monospace;">&nbsp;</span><a
      style="font-family: monospace;" href="#g">-g</a><span
      style="font-family: monospace;"> &nbsp; &nbsp; &nbsp; &nbsp;
      &nbsp; &nbsp; Plot slice instead of looking colors up. (Default
      white to black)<br>
      &nbsp;<a href="#Gs">-G s:L:a:b</a>&nbsp;&nbsp;&nbsp;&nbsp;
      Override plot slice start with Lab or Jab co-ordinate<br>
      &nbsp;<a href="#Ge">-G e:L:a:b</a>&nbsp;&nbsp;&nbsp;&nbsp;
      Override plot slice end with Lab or Jab co-ordinate<br>
      &nbsp;<a href="#V">-V</a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;



      Lookup or plot the 'vcgt' calibration tag from profile<br
        style="font-family: monospace;">
    </span><span style="font-family: monospace;">&nbsp;</span><a
      style="font-family: monospace;" href="#f">-f function</a><span
      style="font-family: monospace;">&nbsp;&nbsp;&nbsp; f = forward, b
      = backwards, g = gamut, p = preview</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;
if
=











      inverted forward, ib = inverted backwards</span><br
      style="font-family: monospace;">
    <span style="font-family: monospace;">&nbsp;</span><a
      style="font-family: monospace;" href="#i">-i intent</a><span
      style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; a =
      absolute, 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;&nbsp;











    </span><span style="font-family: monospace;"> p = perceptual, </span><span
      style="font-family: monospace;">s = saturation, A = disp. abs.
      measurements</span><span style="font-family: monospace;"></span><br
      style="font-family: monospace;">
    <span style="font-family: monospace;">&nbsp;</span><a
      style="font-family: monospace;" href="#o">-o order</a><span
      style="font-family: monospace;">&nbsp;&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;&nbsp;
r
=











      reverse (priority: monochrome &gt; matrix &gt; lut)</span><br
      style="font-family: monospace;">
    <span style="font-family: monospace;">&nbsp;</span><a
      style="font-family: monospace;" href="#p">-p oride</a><span
      style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;











      x = XYZ_PCS, X = XYZ * 100, l = Lab_PCS, L = LCh, y = Yxy, u =
      Yu'v'<br>
      &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; j =
      CIECAM02 Appearance Jab, J = CIECAM02 Appearance JCh<br>
    </span><span style="font-family: monospace;">&nbsp;</span><a
      style="font-family: monospace;" href="#s">-s scale</a><span
      style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Scale











      device range 0.0 - scale rather than 0.0 - 1.0<br>
    </span><br>
    &nbsp; <span style="font-family: monospace;"><span
        style="font-family: monospace;"><a href="#e">-e flag</a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;








        Video encode device input as:<br>
        &nbsp;<a href="#E">-E flag</a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;








        Video decode device output as:<br>
        &nbsp;&nbsp;&nbsp;&nbsp;
        n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        normal 0..1 full range RGB levels (default)<br>
        &nbsp;&nbsp;&nbsp;&nbsp;
        t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (16-235)/255 "TV" RGB levels<br>
        &nbsp;&nbsp;&nbsp;&nbsp;
        6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        Rec601 YCbCr SD (16-235,240)/255 "TV" levels<br>
        &nbsp;&nbsp;&nbsp;&nbsp;
        7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        Rec709 1125/60Hz YCbCr HD (16-235,240)/255 "TV" levels<br>
        &nbsp;&nbsp;&nbsp;&nbsp;
        5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        Rec709 1250/50Hz YCbCr HD (16-235,240)/255 "TV" levels<br>
        &nbsp;&nbsp;&nbsp;&nbsp;
        2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        Rec2020 YCbCr UHD (16-235,240)/255 "TV" levels<br>
        &nbsp;&nbsp;&nbsp;&nbsp;
        C&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        Rec2020 Constant Luminance YCbCr UHD (16-235,240)/255 "TV" lev</span></span><span
      style="font-family: monospace;"><br style="font-family:
        monospace;">
    </span> <span style="font-family: monospace;">&nbsp;</span><a
      style="font-family: monospace;" href="#k">-k [zhxrlv]</a><span
      style="font-family: monospace;">&nbsp;&nbsp;&nbsp; Black
      generation: z = zero K,</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;
h











      = 0.5 K, x = max K, r = ramp K (def.)</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;
l











      = extra PCS input is portion of K locus</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;
v











      = extra PCS input is K target value</span><br style="font-family:
      monospace;">
    <span style="font-family: monospace;">&nbsp;</span><a
      style="font-family: monospace;" href="#kp">-k p stle stpo enpo
      enle shape</a><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;
stle:











      K level at White 0.0 - 1.0</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;
stpo:











      start point of transition Wh 0.0 - Bk 1.0</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;
enpo:











      End point of transition Wh 0.0 - Bk 1.0</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;
enle:











      K level at Black 0.0 - 1.0</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;
shape:











      1.0 = straight, 0.0-1.0 concave, 1.0-2.0 convex</span><br
      style="font-family: monospace;">
    <span style="font-family: monospace;">&nbsp;</span><a
      style="font-family: monospace;" href="#kq">-k q stle0 stpo0 enpo0
      enle0 shape0 stle2 stpo2 enpo2 enle2 shape2</a><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;
Transfer
extra











      PCS input to dual curve limits</span><br style="font-family:
      monospace;">
    <span style="font-family: monospace;">&nbsp;</span><a
      style="font-family: monospace;" href="#K">-K parameters</a><span
      style="font-family: monospace;">&nbsp; Same as -k, but target is K
      locus rather than K value itself</span><br style="font-family:
      monospace;">
    <span style="font-family: monospace;">&nbsp;</span><a
      style="font-family: monospace;" href="#l">-l tlimit</a><span
      style="font-family: monospace;">&nbsp;&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;</span><a
      style="font-family: monospace;" href="#L">-L klimit</a><span
      style="font-family: monospace;">&nbsp;&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;</span><a
      style="font-family: monospace;" href="#a">-a</a><span
      style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
show
actual











      target values if clipped<br>
      &nbsp;<a href="#b">-b</a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
use
CAM











      Jab for clipping<br style="font-family: monospace;">
    </span><span style="font-family: monospace;">&nbsp;</span><a
      style="font-family: monospace;" href="#m">-m</a><span
      style="font-family: monospace;">
      &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
      merge output processing into clut</span><span style="font-family:
      monospace;"></span><span style="font-weight: bold; font-family:
      monospace;"></span><br style="font-family: monospace;">
    <span style="font-family: monospace;">&nbsp;</span><a
      style="font-family: monospace;" href="#c">-c viewcond</a><span
      style="font-family: monospace;">&nbsp;&nbsp;&nbsp; set viewing
      conditions for CIECAM02,</span><br style="font-family: monospace;">
    &nbsp;&nbsp;<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;
either











      an enumerated choice, or a parameter:value change</span><span
      style="font-family: monospace;"></span><br style="font-family:
      monospace;">
    <span style="font-family: monospace;"></span><tt> &nbsp; &nbsp;
      &nbsp; &nbsp;&nbsp; &nbsp; </tt><tt><tt>pc - Critical print
        evaluation environment (ISO-3664 P1)</tt><tt><br>
        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </tt>pp


      - Practical Reflection Print (ISO-3664 P2)<br>
      &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp; pe - Print evaluation
      environment (CIE 116-1995)<br>
    </tt><tt>&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp; pm - Print
      evaluation with partial Mid-tone adaptation</tt><br
      style="font-family: monospace;">
    <span style="font-family: monospace;">&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;











      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; 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><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;&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;&nbsp; c = transparency (default average)</span><br
      style="font-family: monospace;">
    <span style="font-family: monospace;">&nbsp;&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, Abs: D50)</span><br
      style="font-family: monospace;">
    <span style="font-family: monospace;">&nbsp;&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;&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; b:background Background % of image
      luminance (default 20)</span><br style="font-family: monospace;">
    <span style="font-family: monospace;"></span><span
      style="font-family: monospace;"><span style="font-family:
        monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
f:flare&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Flare
light











        % of image luminance (default 1)<br>
      </span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
      g:glare&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Glare light % of ambient
      (default 2)</span><br style="font-family: monospace;">
    <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp; &nbsp;
      &nbsp; &nbsp; g:X:Y:Z&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Glare color as
      XYZ (default media white, Abs: D50)</span><br style="font-family:
      monospace;">
    <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;










      g:x:y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; FGare color as x,
      y</span><br style="font-family: monospace;">
    <tt><span style="font-family: monospace;"><tt><span
            style="font-family: monospace;"><span style="font-family:
              monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;



              h:hkscale&nbsp;&nbsp;&nbsp; Helmholtz-Kohlrausch effect
              scale factor (default 1.0)<br>
            </span>&nbsp;</span><span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;







            m:mtaf&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Mid-tone partial
            adaptation factor (default 0.0)</span><br
            style="font-family: monospace;">
          <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;



            m:X:Y:Z&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Mid-tone Adaptation
            white as XYZ (default D50)</span><br style="font-family:
            monospace;">
          <span style="font-family: monospace;">&nbsp;
            &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
            m:x:y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Mid-tone
            Adaptation white as x, y</span></tt></span></tt> <br
      style="font-family: monospace;">
    <span style="font-family: monospace;">&nbsp; </span><a
      style="font-family: monospace;" href="#p1"><i>inoutfile</i></a><span
      style="font-family: monospace;"> &nbsp;&nbsp; &nbsp;&nbsp; The
      input ICC profile or CAL file.</span><br style="font-family:
      monospace;">
    <br style="font-family: monospace;">
    <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp; The colors
      to be translated should be fed into standard in,</span><br
      style="font-family: monospace;">
    <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp; one input
      color per line, white space separated.</span><br
      style="font-family: monospace;">
    <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp; A line
      starting with a # will be ignored.</span><br style="font-family:
      monospace;">
    <span style="font-family: monospace;">&nbsp;&nbsp;&nbsp; A line not
      starting with a number will terminate the program.</span> <br>
    <h3>Flags and Parameters</h3>
    <a name="v"></a> The <b>-v</b> parameter sets the level of
    verbosity. Default is level 1, which repeats each input value, the
    colorspaces of input and output, the type of conversion algorithm
    used, and if the result was clipped. Level 2 adds prints extra
    information about the profile before doing the conversions. Level 0
    turns off all verbosity, just outputting the results of each
    conversion. Use the latter to capture batch output ready for further
    processing.<br>
    <br>
    <a name="g"></a>The <b>-g</b> flag causes a plot of the device
    values along a slice through the Lab or Jab colorspace, rather than
    allowing the interactive looking up of color values. By default this
    will be the neutral axis from the white point to the black point,
    but the start and end can be overridden using the <span
      style="font-weight: bold;">-G</span> parameters. This is useful in
    determining the existing black generation in a CMYK profile, or
    exploring the behavior of various black generation options using the
    <b>-k</b> parameters. The profile must be a device profile, and the
    PCS must be either Lab or Jab. The default plot is up the neutral
    axis is from the white to the black point (scale 0 to 100%), and
    shows the percentage of each device colorant. To examine a profiles
    B2A table black generation, use the flag <b>-fb</b> to select the
    B2A table, or to invert the A2B table, and be able to explore black
    generation behavior, use the <b>-fif</b> flag. The appropriate
    intent can be selected with the <b>-i</b> flag, &nbsp;as can other
    flags appropriate to the function selected.&nbsp; See <a href="#xg">example</a>.<br>
    <br>
    If a CAL file is used, then <b>-g</b> will simply plot the each
    channels calibration curve. It will also plot the invers curve for <b>-f







      b</b>.<br>
    <br>
    <a name="Gs"></a>The <span style="font-weight: bold;">-G </span><small><span
        style="font-family: monospace;"><span style="font-weight: bold;">s:L:a:b</span></span></small>
    parameter overrides the plot slice start point of white, with some
    other point specified in Lab or Jab Profile Connection Space. The
    parameter must be a single string that combines<span
      style="font-weight: bold;"> s:</span> with the three numbers
    separated by the '<span style="font-weight: bold;">:'</span>
    character (no spaces).<br>
    <br>
    <a name="Ge"></a>The <span style="font-weight: bold;">-G </span><small><span
        style="font-family: monospace;"><span style="font-weight: bold;">e:L:a:b</span></span></small>
    parameter overrides the plot slice end point of black, with some
    other point specified in Lab or Jab Profile Connection Space. The
    parameter must be a single string that combines<span
      style="font-weight: bold;"> s:</span> with the three numbers
    separated by the '<span style="font-weight: bold;">:'</span>
    character (no spaces).<br>
    <br>
    <a name="V"></a>The <b>-V</b> flag tells xicclu to load the given
    ICC profile, and the extract the 'vcgt' display calibration curves
    from the profile. The calibration curves can then be looked up in
    the normal way, or plotted using <b>-g.</b><br>
    <br>
    <a name="f"></a> The <b>-f</b> flag selects which type of table or
    conversion is to be used. In addition to the usual four tables that
    can be accessed in a fully populated Lut based profile, two
    additional options are available in <b>xicclu</b>. One is to invert
    the forward table, and the other is to invert the backward table.
    For non Lut based profiles, -fif is equivalent to -fb, and -fib is
    equivalent to -ff. Note that the -fib combination may not be fully
    supported.<br>
    <br>
    <a name="i"></a> The <b>-i</b> flag selects the intent table used
    for a lut based profile. It also selects between relative and
    absolute colorimetric for non-lut base profiles.<br>
    The -A flag selects Display absolute measurement mode, where the
    Luminance tag value is used restore absolute measurement XYZ values.
    The PCS will be force to be XYZ with this selection.<br>
    <br>
    <a name="o"></a> A 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>
    <a name="p"></a> Normally the native PCS (Profile Connection Space)
    of a device or abstract profile is used, but the <b>-p</b> flag
    allows this to be overridden: <span style="font-weight: bold;">-px</span>:
    XYZ (scaled to 1.0), <span style="font-weight: bold;">-pX</span>:
    XYZ scaled to 100, <span style="font-weight: bold;">-pl</span>:
    L*a*b*, <span style="font-weight: bold;">-pL</span>: LCh, <span
      style="font-weight: bold;">-py</span>: Yxy space, <span
      style="font-weight: bold;"><span style="font-weight: bold;">-pu</span></span>:
    Yu'v' perceptual CIE 1976 UCS diagram Yu'v' space,<span
      style="font-weight: bold;"> -pj</span>: CIECAM02 appearance space
    Jab, or <span style="font-weight: bold;">-pJ</span>: CIECAM02
    appearance space JCh.<span style="font-weight: bold;"><br>
    </span>Note that the CIECAM02 output space selection by default uses
    the colorimetric table of the profile, but that the perceptual or
    saturation tables may be used by selecting them using the <span
      style="font-weight: bold;">-i</span> parameter. 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>
    <a name="s"></a> Usually device values are processed and displayed
    using a normalized value range between 0.0 and 1.0 Sometimes other
    systems scale them to some other range (such as 100 or 255) due to
    an underlying binary representation. The <span style="font-weight:
      bold;">-s</span> flag lets you input and display such data in its
    normal range. For instance, if your device values have a range
    between 0 and 255, use <span style="font-weight: bold;">-s 255.</span><br>
    <br>
    <a name="e"></a>The <b>-e</b> <i>flag</i> applies a Video encoding
    to the input. See <a href="collink.html#E"><b>-E</b></a> for the
    list of encodings.<br>
    <br>
    <b><a name="E"></a></b>The <b>-E</b> <i>flag</i> applies a Video
    encoding to the output. The possible encoding are:<br>
    <br>
    <small><span style="font-family: monospace;"><small><span
            style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;
            n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;










            normal RGB 0..1 full range levels (default)<br>
            &nbsp;&nbsp;&nbsp;&nbsp;
            t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;










            RGB (16-235)/255 "TV" levels<br>
            &nbsp;&nbsp;&nbsp;&nbsp;
            6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;










            Rec601 YCbCr SD (16-235,240)/255 "TV" levels<br>
            &nbsp;&nbsp;&nbsp;&nbsp;
            7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;










            Rec709 1125/60Hz YCbCr HD (16-235,240)/255 "TV" levels<br>
            &nbsp;&nbsp;&nbsp;&nbsp;
            5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;










            Rec709 1250/50Hz YCbCr HD (16-235,240)/255 "TV" levels<br>
            &nbsp;&nbsp;&nbsp;&nbsp;
            2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;










            Rec2020 YCbCr UHD (16-235,240)/255 "TV" levels<br>
            &nbsp;&nbsp;&nbsp;&nbsp;
            C&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;










            Rec2020 Constant Luminance YCbCr UHD (16-235,240)/255 "TV"
            levels<br>
          </span></small></span></small><br>
    <a name="k"></a> When inverting a CMYK profile, (ie. using the -fif
    flag), an input PCS value can have many possible CMYK solutions. To
    be able to return a unique solution, a black level (or black inking
    rule) should be chosen. The choice here reflect similar choices in
    black generation available in other tools (eg. <a
      href="colprof.html">colprof</a>, <a href="collink.html"> collink</a>),










    with the addition of two extra options.<br>
    <br>
    &nbsp;Possible arguments to the <b>-k</b> option are:<br>
    <br>
    <b> -kz</b> selects minimum black (0.0)<br>
    <b> -kh</b> selects a black value of 0.5<br>
    <b> -kx</b> selects the maximum possible black (1.0)<br>
    <b> -kr</b> selects a linear black ramp, starting at minimum black
    for highlight, and maximum black for shadow (equivalent to -kp 0 0 1
    1 1). This is the default.<br>
    <b> -kl</b> uses an extra (fourth) value entered after the input PCS
    value, to select a black locus target between 0.0 and 1.0.<br>
    <b> -kv</b> uses an extra (fourth) value entered after the input PCS
    value, to select a black value target value between 0.0 and 1.0.<br>
    <br>
    <b><a name="kp"></a>-k p stle stpo enpo enle shape</b>&nbsp; allows
    an arbitrary black value ramp to be defined, consisting of a
    starting value (stle) for highlights, a breakpoint L value (stpo)
    where it starts to transition to the shadow level, an end breakpoint
    L (enpo) where it flattens out again, and the finishing black level
    (enle) for the shadows. There is also a curve parameter, that
    modifies the transition from stle to enle to either be concave
    (ie.&nbsp; the transition starts gradually and and finished more
    abruptly) using values 0.0-1.0, with 0.0 being most concave, or
    convex (the transition starts more abruptly but finishes gradually),
    using values 1.0-2.0, with 2.0 being the most convex.<br>
    <br>
    Typical black value generation curve with parameters something like:
    -kp 0 .05 1 .9 .8<br>
    <br>
    <tt> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1.0 K &nbsp; |
      &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;enpo<br>
      &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
|&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;











      &nbsp; &nbsp;_______&nbsp; enle<br>
      &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
|&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;











      &nbsp; &nbsp;/<br>
      &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
|&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;











      &nbsp; /<br>
      &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
|&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;











      &nbsp;/<br>
      &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
|&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;











      /<br>
      &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
      stle&nbsp; | ------/<br>
      &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;
      &nbsp;&nbsp;&nbsp;&nbsp; +-------------------<br>
      &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0.0 K&nbsp;
      0.0&nbsp;&nbsp;&nbsp;
      stpo&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1.0<br>
      &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
White&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;











      Black<br>
    </tt><br>
    <b><a name="kq"></a>-k q stle0 stpo0 enpo0 enle0 shape0 stle2 stpo2
      enpo2 enle2 shape2</b> is a combination of the <b>-kv</b> and <b>-kp</b>
    functionality, with the black being preserved in CMYK to CMYK
    linking, with the output black constrained to be between the first
    and second set of curve parameters.<br>
    <br>
    <a name="K"></a> <span style="font-weight: bold;">-K parameters.</span>
    Any of the <span style="font-weight: bold;">-k</span> options above
    can use the <span style="font-weight: bold;">-K</span> version, in
    which rather than an absolute black value target being defined by
    the inking rule, the black proportion out of the maximum possible
    for each color is defined. This makes the inking curve scale
    proportionally over the gamut, rather than clipping in dark
    chromatic regions where not much black can be added.<br>
    <tt> </tt><span style="text-decoration: underline;"></span><br>
    &nbsp;The <b>-g</b> flag can be used together with the <b>-fif</b>
    flag, to plot out the resulting black channel behaviour for various
    <b>-k</b> or <span style="font-weight: bold;">-K </span>parameter
    values.<br>
    <br>
    <b><a name="l"></a>-l</b> <i>tlimit</i>&nbsp; &nbsp;&nbsp; Sets the
    total ink limit (TAC, Total Area Coverage) for the CMYK inverse
    forward lookup, as a total percentage from 0% to 400%. If none is
    provided, it will be estimated from the profile relcolor B2A table.
    The ink limit will be in final calibrated device values if the
    profile includes calibration information.<br>
    <br>
    <b><a name="L"></a>-L</b> <i>klimit</i>&nbsp; &nbsp; Sets the black
    ink limit for the CMYK inverse forward lookup, as a total percentage
    from 0% to 100%. If none is provided, it will be estimated from the
    profile relcolor B2A table. The ink limit will be in final
    calibrated device values if the profile includes calibration
    information.<br>
    <br>
    <a name="a"></a> If the <b>-a</b> flag is used for inverse forward
    lookups, then if the target PCS value cannot be reproduced by the
    device (ie. it clips), then the achievable, clipped PCS value is
    displayed.<br>
    <br>
    <a name="b"></a> If the <b>-b</b> flag is used for inverse forward
    lookups, then out of gamut clipping will be performed in the
    CIECAM02 Jab appearance colorspace, rather than L*a*b* colorspace.<br>
    <br>
    <a name="m"></a> The <b>-m</b> flag turns on an internal processing
    option, in which the per device curve lookup table processing is
    merged into the main multi-dimensional interpolation lut lookup.<br>
    <br>
    <a name="c"></a>Whenever PCS values are to be specified or displayed
    in Jab/CIECAM02 colorspace, a set of viewing conditions will be used
    to determine the details of the conversion. The <b>-c</b> parameter
    allows the specification of the viewing conditions. Viewing
    conditions can be specified in two basic ways. One is to select from
    the list of "pre canned", enumerated viewing conditions, choosing
    one that is closest to the conditions that are appropriate for the
    media type and situation. Alternatively, the viewing conditions
    parameters can be specified in detail individually. If both methods
    are used, them the chosen enumerated condition will be used as a
    base, and its parameters will then be individually overridden.<br>
    <br>
    <a name="p1"></a> The final parameter is the name of the <a
      href="File_Formats.html#ICC">ICC</a> profile to be used. On the
    MSWindows platform a .icm extension is generally used, and on Apple
    or Unix/Linux platforms a .icc extension is often used.<br>
    <h3>Usage and Discussion</h3>
    Typical usage for an output profile might be:<br>
    <br>
    &nbsp;&nbsp;&nbsp; xicclu -ff -ip profile.icm<br>
    <br>
    Normally the program is interactive, allowing the user to type in
    input color values, each number separated by a space, and the
    resulting output color being looked up and displayed after pressing
    return. To batch process a group of color values, prepare a text
    file containing each input value on a separate line, and use the
    input indirection facilities of your command line shell to redirect
    this input file into the standard input of xicclu. The output can be
    captured to a file by redirecting standard output to a file. In most
    shells this would be done something like this:<br>
    <br>
    &nbsp;&nbsp;&nbsp; xicclu -ff -ip profile.icm &lt; inputvalues.txt
    &gt; outputvalues.txt<br>
    <br>
    <a name="xg"></a>When plotting the neutral axis behavior, plotting
    the existing B2A table behavior would typically be done something
    like this:<br>
    <br>
    &nbsp;&nbsp;&nbsp; xicclu -g -fb profile.icm<br>
    <br>
    Exploring possible black generation and ink limiting behavior might
    be done like this:<br>
    <br>
    &nbsp;&nbsp;&nbsp; xicclu -g -fif -kp 0 .1 .9 1 .5 -l230 -L95
    profile.icm<br>
    <br>
    <br>
    <br>
    <br>
    <br>
    <br>
    <br>
  </body>
</html>