[argyllcms] Re: Colprof feature request: amount of black point hue correction control

Hi Gerhard,

Gerhard Fuernkranz wrote:

I still cannot explain the effect below, though.

$collink -v -qh -ip -cmt -dpp sRGB.icm xxx.icc link.icc
$ icclu -ff link.icc
0 0 0
0.000000 0.000000 0.000000 [RGB] -> Lut -> 0.176970 0.130748 0.132303 [RGB]
[...]
$collink -v -qh -l300 -ip -cmt -dpp sRGB.icm xxx.icc link.icc
$ icclu -ff link.icc
0 0 0
0.000000 0.000000 0.000000 [RGB] -> Lut -> 0.001296 0.001800 0.002326 [RGB]
I guess the reason is that "-l300" as well as "-cmt -dpp" imply gamut mapping modes departing from the default (simple mode): 

$collink -v -qh -ip sRGB.icm test.icc link1.icc
Got options
Configured options
Loading input A2B table
Usinge Y to L* and L* to Y curves for input
Loading output B2A table
Gamut mapping mode is 'Simple' <------------- !!!
[...]

$collink -v -qh -ip -cmt -dpp sRGB.icm test.icc link2.icc
Got options
Configured options
Loading input A2B table
Usinge Y to L* and L* to Y curves for input
Loading output B2A table
Gamut mapping mode is 'Mapping' <------------- !!!
[...]


$collink -v -qh -ip -cmt -dpp -l300 sRGB.icm test.icc link3.icc
Got options
Output total ink limit assumed is 300%
Configured options
Loading input A2B table
Usinge Y to L* and L* to Y curves for input
Loading output inverse A2B table
Gamut mapping mode is 'Mapping inverse A2B' <------------- !!!
[...]

Klaus

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