> What Im getting with photoshop and the RIP via Windows ICM are:
>
> RGB(255, 255, 255) => LAB( 100,-2,-19)
> RGB(36, 56, 130) => LAB( 24,13,-61)
> RGB(83, 66, 14) => LAB( 29, 6, 35)
> RGB(255,255,0) => LAB(98,-19,95)
>
> However in LittleCMS Im getting these results by using the built in LAB
profile :
> hProfileLab = cmsCreateLabProfile(Null) // Using 16 Bits and D50 same as
PCS
> hProfileAdobe = cmsGetColorSpace("Adobe1998.icm") // Using 8 Bits
> hTransform = hTransform = cmsCreateTransform(hProfileAdobe , InputType,
hProfileLab , OutputType,INTENT_ABSOLUTE_COLORIMETRIC , cmsFLAGS_NOTPRECALC)
>
> RGB(255, 255, 255) => LAB( 100,-9,-19) - SAME -
> RGB(36, 56, 130) => LAB( 24,18,-60) - DIFFERENT -
> RGB(83, 66, 14) => LAB( 29, 3, 35) - DIFFERENT-
> RGB(255,255,0) => LAB(97,-25,96) - DIFFERENT -
>
> Can anybody explain this? ... Am I either missing a whitepoint or Gamma???
Not sure about why ICM got these values, but I've tried Bruce Lindbloom's
color space calculator and numbers agree with lcms:
http://www.brucelindbloom.com/ColorCalculator.html
Set Adaptation to "None" since you are doing absolute colorimetric.
Regards,
Marti.
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