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authorJörg Frings-Fürst <debian@jff-webhosting.net>2014-09-07 13:29:54 +0200
committerJörg Frings-Fürst <debian@jff-webhosting.net>2014-09-07 13:29:54 +0200
commita879b4e708b3e46c9697ba6581687eeb5b02a320 (patch)
treef85acc5cb1a7c0b03a050c879c20cab3deb9f40e /doc/colprof.html
parent556dffcdad42b938bc196819aa463247de709765 (diff)
parentc07d0c2d2f6f7b0eb6e92cc6204bf05037957e82 (diff)
state from 2014-09-07 13:30 MESZ
Diffstat (limited to 'doc/colprof.html')
-rw-r--r--doc/colprof.html662
1 files changed, 621 insertions, 41 deletions
diff --git a/doc/colprof.html b/doc/colprof.html
index de9d5c2..022f984 100644
--- a/doc/colprof.html
+++ b/doc/colprof.html
@@ -3,7 +3,7 @@
<head>
<title>colprof</title>
<meta http-equiv="content-type" content="text/html;
- charset=ISO-8859-1">
+ charset=windows-1252">
<meta name="author" content="Graeme Gill">
</head>
<body>
@@ -26,6 +26,18 @@
+
+
+
+
+
+
+
+
+
+
+
+
&nbsp; &nbsp; &nbsp; &nbsp; Verbose mode<br>
&nbsp;<a href="#A">-A "manufacturer"</a>&nbsp; Set the
manufacturer description string<br>
@@ -42,6 +54,18 @@
Transparency, Matte, Negative, BlackAndWhite<br>
</small></tt><tt><small>&nbsp;<a href="colprof.html#Zi">-Z prsa</a>&nbsp;
+
+
+
+
+
+
+
+
+
+
+
+
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Default
intent: Perceptual, Rel. Colorimetric, Saturation, Abs.
Colorimetric</small></tt><tt><br>
@@ -51,7 +75,8 @@
&nbsp;<a href="#b">-b [lmhun]</a>&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;
&nbsp; Low quality B2A table - or specific B2A quality or none
for input device<br>
- &nbsp;<a href="#y">-y</a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
+ &nbsp;<a href="#ni">-ni</a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
+
@@ -63,8 +88,6 @@
- &nbsp; &nbsp; &nbsp; &nbsp; Verify A2B profile<br>
- &nbsp;<a href="#ni">-ni</a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
@@ -93,6 +116,18 @@
+
+
+
+
+
+
+
+
+
+
+
+
&nbsp; &nbsp; &nbsp; &nbsp; Don't create output (PCS) shaper
curves<br>
</small></tt><tt><small>&nbsp;<a href="#nc">-nc</a>
@@ -123,6 +158,18 @@ x
+
+
+
+
+
+
+
+
+
+
+
+
max K, r = ramp K<br>
&nbsp;<a href="#kp">-k p stle stpo enpo enle shape</a><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
@@ -147,6 +194,18 @@ White
+
+
+
+
+
+
+
+
+
+
+
+
- 1.0<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;
@@ -171,6 +230,18 @@ Wh
+
+
+
+
+
+
+
+
+
+
+
+
0.0 - Bk 1.0<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;
@@ -195,6 +266,18 @@ Wh
+
+
+
+
+
+
+
+
+
+
+
+
0.0 - Bk 1.0<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;
@@ -218,6 +301,18 @@ Black
+
+
+
+
+
+
+
+
+
+
+
+
0.0 - 1.0<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;
@@ -242,10 +337,34 @@ concave,
+
+
+
+
+
+
+
+
+
+
+
+
1.0-2.0 convex<br>
&nbsp;<a href="#K">-K parameters</a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
+
+
+
+
+
+
+
+
+
+
+
+
Same as -k, but target is K locus rather than K value itself<br>
&nbsp;<a href="#l">-l <i>tlimit</i></a>&nbsp;&nbsp; &nbsp;
&nbsp; &nbsp;&nbsp; override CMYK total ink limit, 0 - 400%
@@ -277,6 +396,18 @@ cLUT
+
+
+
+
+
+
+
+
+
+
+
+
x = XYZ cLUT, X = display XYZ cLUT + matrix<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;
@@ -300,6 +431,18 @@ s
+
+
+
+
+
+
+
+
+
+
+
+
shaper+matrix, m = matrix only,<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;
@@ -324,6 +467,18 @@ S
+
+
+
+
+
+
+
+
+
+
+
+
single shaper+matrix<br>
&nbsp;<a href="#u">-u</a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;
@@ -333,6 +488,18 @@ S
+
+
+
+
+
+
+
+
+
+
+
+
If input profile, auto scale WP to allow extrapolation</small></tt><tt><br>
</tt><tt> </tt><tt><small><small>&nbsp;<a href="#uc">-uc</a>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;
@@ -359,17 +526,58 @@ and
+
+
+
+
+
+
+
+
+
+
+
+
primaries to be +ve</tt><tt><br>
- </tt><tt>&nbsp;</tt><tt><small><small><a
- href="file:///D:/src/argyll/doc/colprof.html#f">-f [<i>illum</i>]</a>
+ &nbsp;<a href="#V">-V demphasis</a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
+
+
+
+
+ Degree of dark region cLUT grid emphasis 1.0-3.0 (default 1.00 =
+ none)<br>
+ </tt><tt>&nbsp;</tt><tt><small><small><a href="#f">-f [<i>illum</i>]</a>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Use Fluorescent
Whitening Agent compensation [opt. simulated inst. illum.:<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
+
+
+
+
+
+
+
+
+
+
+
+
M0, M1, M2, </small></small></tt><tt><small><small><small>A,
C, D50 (def.), D50M2, D65, F5, F8, F10 or file.sp ]</small></small></small></tt><tt><br>
- </tt><tt><small><small><small><small>&nbsp;<a
- href="file:///D:/src/argyll/doc/colprof.html#i">-i <i>illum</i></a>&nbsp;&nbsp;
+ </tt><tt><small><small><small><small>&nbsp;<a href="#i">-i <i>illum</i></a>&nbsp;&nbsp;
+
+
+
+
+
+
+
+
+
+
+
+
&nbsp; &nbsp; &nbsp; &nbsp; Choose illuminant for
computation of CIE XYZ from spectral data &amp; FWA:<br>
@@ -385,6 +593,18 @@ D50
(def.),
D50M2,
+
+
+
+
+
+
+
+
+
+
+
+
D65, F5, F8, F10 or file.sp</small></small></small><br>
&nbsp;<a href="#o">-o <i>observ</i></a>&nbsp; &nbsp; &nbsp;
&nbsp; &nbsp; Choose CIE Observer for spectral data:<br>
@@ -400,6 +620,18 @@ D50M2,
+
+
+
+
+
+
+
+
+
+
+
+
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1931_2 </small></tt><tt><small>(def.)</small></tt><tt><small>,
1964_10, S&amp;B 1955_2, shaw, J&amp;V 1978_2<br>
&nbsp;<a href="#r">-r avgdev</a> &nbsp; &nbsp; &nbsp;
@@ -427,6 +659,18 @@ for
+
+
+
+
+
+
+
+
+
+
+
+
given source<br>
&nbsp;<a href="#S">-S src.icc</a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
@@ -440,6 +684,18 @@ for
+
+
+
+
+
+
+
+
+
+
+
+
Apply gamut mapping to output profile perceptual and saturation
B2A table<br>
&nbsp;<a href="#nP">-nP</a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
@@ -454,6 +710,18 @@ for
+
+
+
+
+
+
+
+
+
+
+
+
Use colormetric source gamut to make output profile perceptual
table<br>
&nbsp;<a href="#nS">-nS</a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
@@ -468,6 +736,18 @@ for
+
+
+
+
+
+
+
+
+
+
+
+
Use colormetric source gamut to make output profile saturation
table<br>
&nbsp;<a href="#g">-g src.gam</a>
@@ -490,6 +770,18 @@ for
+
+
+
+
+
+
+
+
+
+
+
+
Override gamut mapping intent for output profile saturation
table:<br>
</small></tt><tt><small> &nbsp; &nbsp; &nbsp;
@@ -520,6 +812,18 @@ for
+
+
+
+
+
+
+
+
+
+
+
+
pa - Perceptual Appearance</small></tt><tt><br>
</tt><tt> </tt><tt><small>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
@@ -533,12 +837,37 @@ for
+
+
+
+
+
+
+
+
+
+
+
+
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ms - Saturation<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; s - Enhanced Saturation [ICC
Saturation]<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;
&nbsp;&nbsp; &nbsp; al - Absolute Colorimetric (Lab)</small></tt><tt><small><br>
+ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
+
+
+
+
+
+
+
+
+
+
+
+ rl - White Point Matched Colorimetric (Lab)<br>
&nbsp;<a href="#c">-c viewcond</a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
@@ -551,6 +880,18 @@ for
+
+
+
+
+
+
+
+
+
+
+
+
set input viewing conditions for output profile CIECAM02 gamut
mapping,<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
@@ -565,6 +906,18 @@ for
+
+
+
+
+
+
+
+
+
+
+
+
either an enumerated choice, or a parameter<br>
&nbsp;<a href="#d">-d viewcond</a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
@@ -578,6 +931,18 @@ for
+
+
+
+
+
+
+
+
+
+
+
+
set output viewing conditions for output profile CIECAM02, gamut
mapping<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
@@ -592,6 +957,18 @@ for
+
+
+
+
+
+
+
+
+
+
+
+
either an enumerated choice, or a parameter:value change<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
@@ -605,6 +982,18 @@ for
+
+
+
+
+
+
+
+
+
+
+
+
Also sets out of gamut clipping CAM space.<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
@@ -618,6 +1007,18 @@ for
+
+
+
+
+
+
+
+
+
+
+
+
Enumerated Viewing Conditions:<br>
</small></tt><tt><small>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp;&nbsp; &nbsp; pp - Practical Reflection Print (ISO-3664
@@ -660,6 +1061,18 @@ for
+
+
+
+
+
+
+
+
+
+
+
+
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp; c = transparency (default average)<br>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
@@ -677,20 +1090,41 @@ for
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; b:background&nbsp; Background %
of image luminance (default 20)<br>
&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;
- &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; l:scenewhite&nbsp;
- Scene white in cd.m^2 if surround = auto (default 250)<br>
- &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
- &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
- f:flare&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Flare light % of
- image luminance (default 1)<br>
- &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
- &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
- f:X:Y:Z&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Flare color as XYZ
- (default media white)<br>
- &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
- &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
- f:x:y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Flare
- color as x, y<br>
+ &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;
+ l:imageewhite&nbsp; Image white in cd.m^2 if surround = auto
+ (default 250)</small></tt><br>
+ <tt><small><small><span style="font-family: monospace;"><small><span
+ style="font-family: monospace;">&nbsp; &nbsp; &nbsp;
+ &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;
+ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
+ f:flare&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Flare light
+ % of image luminance (default 0)<br>
+ </span></small>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
+ &nbsp;&nbsp; </span><span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
+
+
+
+
+
+
+
+
+
+
+ g:glare&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Glare light % of
+ ambient (default 1)</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;
+ g:X:Y:Z&nbsp;&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;
+ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
+ g:x:y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Glare
+ color as x, y</span></small> <br>
&nbsp;<a href="#P">-P</a>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
@@ -704,6 +1138,18 @@ for
+
+
+
+
+
+
+
+
+
+
+
+
Create gamut gammap_p.wrl and gammap_s.wrl diagostics<br>
</small></tt><tt><small>&nbsp;<a href="#O">-O outputfile</a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Override
@@ -718,6 +1164,18 @@ Override
+
+
+
+
+
+
+
+
+
+
+
+
the default output filename &amp; extension.</small></tt><tt><br>
</tt><tt> </tt><tt><small>&nbsp;<a href="#p1"><i>inoutfile</i></a>
&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Base name for
@@ -824,13 +1282,6 @@ Override
profiles and matrix profiles will only contain a colorimetric intent
table or matrix.<br>
<br>
- <a name="y"></a> The <b>-y</b> flag does a verification check on
- the AtoB profile. This is done by comparing what CIE colors the
- profile predicts for the test chart test patches, and comparing them
- to the actual values. A summary of the average and maximum Lab delta
- E's will be printed out if this flag is set. If the <b>-v</b> flag
- is also set, then information for each patch will also be printed.<br>
- <br>
<a name="ni"></a><a name="np"></a><a name="no"></a>Normally cLUT
base profiles are generated with three major elements:- per device
channel (shaper) input curves, the multi-dimensional lut table, and
@@ -859,6 +1310,18 @@ the
+
+
+
+
+
+
+
+
+
+
+
+
device and CIE/spectral sample data and calibration curves used to
create a profile is stored in the <span style="font-weight: bold;">'targ'</span>
text tag in the resulting ICC profile. To suppress this and make the
@@ -873,6 +1336,18 @@ the
+
+
+
+
+
+
+
+
+
+
+
+
</span>flag. <span style="font-weight: bold;">Note</span> that this
will then preclude final calibrated device value ink limits from
being computed for the resulting profile in subsequent use (ie. <a
@@ -922,6 +1397,18 @@ the
+
+
+
+
+
+
+
+
+
+
+
+
|&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;
@@ -936,6 +1423,18 @@ the
+
+
+
+
+
+
+
+
+
+
+
+
|&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;
@@ -949,6 +1448,18 @@ the
+
+
+
+
+
+
+
+
+
+
+
+
|&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; &nbsp; /<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
@@ -962,6 +1473,18 @@ the
+
+
+
+
+
+
+
+
+
+
+
+
|&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;/<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
@@ -975,6 +1498,18 @@ the
+
+
+
+
+
+
+
+
+
+
+
+
|&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; /<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
stle&nbsp; | ------/<br>
@@ -996,6 +1531,18 @@ White&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb
+
+
+
+
+
+
+
+
+
+
+
+
Black<br>
</tt> <br>
For minimum sensitivity of printed output to the lighting spectrum,
@@ -1063,8 +1610,8 @@ White&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb
By default (equivalent to <b>-al</b>) profile creates a <span
style="font-weight: bold;">cLUT</span> based table profile with a
PCS (Profile Connection Space) of L*a*b*, which generally gives the
- most accurate results, and allows for the four different rendering
- intents that ICC profiles can support.<br>
+ most robust and accurate results, and allows for the four different
+ rendering intents that ICC profiles can support.<br>
<br>
A cLUT base table profile using a PCS of XYZ can be created if <b>-ax</b>
is used, and this may have the advantage of better accuracy for
@@ -1072,14 +1619,16 @@ White&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb
clipping for displays with a colorant chromaticity that can't be
encoded in L*a*b* PCS space, and may give a more accurate white
point for input devices by avoiding clipping of values above the
- white point that can occur in L*a*b* based cLUT input profiles. By
- default cLUT XYZ PCS Display profiles will also have a set of dummy
- matrix tags included in them, for better compatibility with other
- systems. The dummy matrix deliberately interchanges Red, Green and
- Blue channels, so that it is obvious if the cLUT tables are not
- being used. If it is important for both the cLUT and matrix be
- accurate, use <span style="font-weight: bold;">-aX</span>, which
- will create shaper/matrix tags.<br>
+ white point that can occur in L*a*b* based cLUT input profiles. A <b>disadvantage</b>
+ of this type of profile is that it can be a lot less robust if given
+ a test patch set that is sparse, or too evenly spaced. By default
+ cLUT XYZ PCS Display profiles will also have a set of dummy matrix
+ tags included in them, for better compatibility with other systems.
+ The dummy matrix deliberately interchanges Red, Green and Blue
+ channels, so that it is obvious if the cLUT tables are not being
+ used. If it is important for both the cLUT and matrix be accurate,
+ use <span style="font-weight: bold;">-aX</span>, which will create
+ shaper/matrix tags.<br>
<br>
For RGB input or display profiles, a simpler type of profile using
either a gamma curves or a general shaper curves, combined with a
@@ -1159,6 +1708,25 @@ White&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb
black and primary values, so as to work with these programs, but
this will reduce the accuracy of the profile.<br>
<br>
+ <a name="V"></a>The <b>-V demphasis</b> parameter allows sets the
+ degree to which cLUT grid spacing should emphasize the accuracy of
+ modelling the device response in the dark regions, over that of the
+ lighter regions. By default this value will be a scaled down version
+ of the one set using the <a href="targen.html#V">targen -V</a>
+ parameter, and values in the range <b>1.3 - 1.6</b> are a good
+ place to start. Display devices used for video or film reproduction
+ are typically viewed in dark viewing environments with no strong
+ white reference, and typically employ a range of brightness levels
+ in different scenes. This often means that the devices dark region
+ response is of particular importance, so increasing the density of
+ cLUT grid points in the dark region may improved the balance of
+ accuracy of the resulting profile for video or film reproduction.
+ This is most valuable when used in concert with a set of test points
+ that more densely sample the dark regions, by use of the
+ corresponding targen -V parameter. Emphasizing the dark region
+ characterization will reduce the accuracy of&nbsp; modelling the
+ lighter regions given a certain quality/grid resolution.<br>
+ <br>
<a name="f"></a> The <b>-f</b> flag enables Fluorescent Whitening
Agent (FWA) compensation. This only works if spectral data is
available and, the instrument is not UV filtered.&nbsp; FWA
@@ -1192,6 +1760,18 @@ White&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb
+
+
+
+
+
+
+
+
+
+
+
+
Violet</span> spectral content, otherwise FWA compensation won't
work properly. This means you ideally need to measure your
illuminant spectrum using an instrument that can measure down to
@@ -1500,7 +2080,7 @@ White&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb
profile (.icm extension on the MSWindows platform, .icc on Apple or
Unix platforms). The <span style="font-weight: bold;">-O</span>
parameter will override this default.
- <h3>Discussion</h3>
+ <h3><a name="Di"></a>Discussion</h3>
Note that monochrome profiling isn't currently supported. It may be
supported sometime in the future.<br>
<br>
@@ -1512,7 +2092,7 @@ White&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb
readings, average errors of 5 or less, and maximum errors of 15 or
less would normally be expected. If errors are grossly higher than
this, then this is an indication that something is seriously wrong
- with the device testing, or profile creation.<br>
+ with the device measurement, or profile creation.<br>
<br>
Given a .ti3 file from a display device that contains calibration
curves (generated by <a href="dispcal.html">dispcal</a>, passed