From c07d0c2d2f6f7b0eb6e92cc6204bf05037957e82 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?J=C3=B6rg=20Frings-F=C3=BCrst?= Date: Mon, 1 Sep 2014 15:43:52 +0200 Subject: Imported Upstream version 1.6.3 --- doc/iccgamut.html | 335 +++++++++++++++++++++++++++++------------------------- 1 file changed, 177 insertions(+), 158 deletions(-) (limited to 'doc/iccgamut.html') diff --git a/doc/iccgamut.html b/doc/iccgamut.html index 6d2f5ba..fe555cf 100644 --- a/doc/iccgamut.html +++ b/doc/iccgamut.html @@ -12,186 +12,226 @@ Create a gamut file or VRML file  of the color gamut of an ICC profile.
iccgamut 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 VRML file.
+ 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 VRML file.

Usage

iccgamut [-options] profile
 -v            + + + Verbose
 -d - sres       Surface - resolution details 1.0 - 50.0
+ sres       Surface resolution + details 1.0 - 50.0
 -w            emit + + + VRML .wrl file as well as CGATS .gam file
 -n            Don't + + + add VRML axes or white/black point
 -k            Add + + + VRML markers for prim. & sec. "cusp" points
 -f - function   f = - forward*, b = backwards
-   - -i - intent     p = - perceptual, r = relative colorimetric,

+   -i + intent     p = perceptual, r = relative + colorimetric,
               s + + + = saturation, a = absolute (default), d = profile default
 -o - order      n = normal - (priority: lut > matrix > monochrome)
+ order      n = normal (priority: lut + > matrix > monochrome)
               r - = reverse (priority: monochrome > - matrix > lut)
+ + + + = reverse (priority: monochrome > matrix > lut)
 -p oride      l - = - Lab_PCS (default), j = CIECAM02 Appearance Jab
 -l - tlimit     set total - ink limit, 0 - 400% (estimate by default)
+ tlimit     set total ink limit, 0 - 400% + (estimate by default)
 -L - klimit     set black ink - limit, 0 - 100% (estimate by default)
+ klimit     set black ink limit, 0 - 100% + (estimate by default)
 -c - viewcond   set - viewing conditions for CIECAM02,
+ viewcond   set viewing conditions for CIECAM02,
               either - an enumerated choice, or a series of - parameters:value changes
+ + + + an enumerated choice, or a series of parameters:value changes
  -           pp - Practical Reflection - Print - (ISO-3664 P2)
+ style="font-family: monospace;">        +     pp - Practical Reflection Print (ISO-3664 P2)
          + + +   pe - Print evaluation environment (CIE 116-1995)
          + + +   pc - Critical print evaluation environment (ISO-3664 P1)
        + + +     mt - Monitor in typical work environment
          + + +   mb - Monitor in bright work environment
      -   -     md - Monitor in darkened work +       md - Monitor in darkened work environment
      -   -     jm - Projector in dim environment

      -   -     jd - Projector in dark environment

     -   -     pcd - Photo CD - original scene +       pcd - Photo CD - original scene outdoors
      -   -     ob - Original scene - Bright Outdoors

      -   -     cx - Cut Sheet Transparencies on a viewing - box
+       cx - Cut Sheet Transparencies on a + viewing box
         s:surround   + + + n = auto, a = average, m = dim, d = dark,
                 + + +      c = transparency (default average)
         w:X:Y:Z      - Adapted white point - as XYZ (default media white)
+ + + + Adapted white point as XYZ (default media white)
         w:x:y        - Adapted white point as - x, y
+ + + + Adapted white point as x, y
         a:adaptation + + + Adaptation luminance in cd.m^2 (default 50.0)
         b:background Background + + + % of image luminance (default 20)
-          l:scenewhite Scene - white in - cd.m^2 if surround = auto (default 250)
-          +          l:imagewhite Image + white in cd.m^2 if surround = auto (default 250)
+          f:flare      - Flare - light % of image luminance (default 1)
+ + + + Flare light % of image luminance (default 0)
+          + g:glare      Glare light % of ambient + (default 1)
         -f:X:Y:Z      - Flare color as - XYZ (default media white)
+ + + g:X:Y:Z      Glare color as XYZ + (default media white)
         -f:x:y        - Flare color as x, y
+ + + g:x:y        Glare color as + x, y
 -s             Create + + + special cube surface topology plot
profile       -    The - name of the ICC - profile, as well as the basename of the gamut [.gam] and/or VRML [.wrl] file. -
+    The name of the ICC profile, as well as the + basename of the gamut [.gam] and/or VRML [.wrl] file.

Comments

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.
@@ -201,127 +241,106 @@ Create cubic L*a*b* units.

The -d 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.
+ 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.

The -w flag causes a VRML file to be produced, as well as a gamut file.

- The -n flag suppresses the L*a*b* axes being created in - the VRML.
+ The -n flag suppresses the L*a*b* axes being created in the + VRML.

The -k flag adds markers - for - each of the primary and secondary "cusp" points (Red, Yellow, Green, - Cyan, Blue & Magenta). No markers will be displayed if the cusps - cannot be determined.
+ for each of the primary and secondary "cusp" points (Red, Yellow, + Green, Cyan, Blue & Magenta). No markers will be displayed if + the cusps cannot be determined.

The -f 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.
+ in plotting the gamut. The backwards tables generally incorporate + gamut compression, and therefore don't reflect the native + capabilities of the device.

The -i 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.
+ 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.

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.  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 -o - flag, - reverses this order.   
+ information, and only using monochrome information if it is all that + is present. The -o flag, reverses this + order.   

-p: By default the gamut - will - be created in L*a*b* colorspace. If  -pj is selected, then CIECAM02 + will be created in L*a*b* colorspace. If  -pj 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 colprof.
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 + appearance of the native device, but that the perceptual or saturation transforms may be used by selecting them using the -i 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 -ia in combinations - with - -pj, then  Jab with - a fixed white reference is used, which emulates an absolute CIECAM02 - Jab - appearance space.
+ 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 -ia + in combinations with -pj, + then  Jab with a fixed white reference is used, which emulates + an absolute CIECAM02 Jab appearance space.

The -l parameter allows setting a total ink limit (TAC) for - printing - devices. If a device has a total ink limit, and hasn't been + 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.
+ 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.

The -L 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.
+ 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.

The -c parameter allows setting the CIECAM02 viewing - conditions, - either by choosing a typical viewing environment, or controlling - particular viewing condition parameters.
+ conditions, either by choosing a typical viewing environment, or + controlling particular viewing condition parameters.

The -s 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.
+ special hyper-cube surface plot that is artificially colored. This + can be useful for identifying the topology of the black ink color + response.

Example

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:
+ an ink limit of 260%, one might use:

    iccgamut -w - -ff - -ia -l260 profile.icm
+ -ff -ia -l260 profile.icm

and the resulting files will be profile.gam and profile.wrl.
+
+ To create a gamut suitable for CIECAM02  gamut mapping space in + colprof or collink, something like
+
+     iccgamut -ir -pj -cmt  profile.icm
+
+ where the viewing conditions "mt" should the same as the source + conditions in colprof or collink.



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