Hi Marti
looking at the stages created for a sRGB -> XYZ transform I see 3 stages are
generated
- curve set stage for the gamma curves
- matrix float stage converting device rgb to xyz (I see the matrix is scaled
so by 1/MAX_ENCODEABLE_XYZ)
- a second matrix including offset:
Offset: 0.0016800256 0.0017365765 0.0014350219
Matrix: 0.9965152458 0.0000000000 0.0000000000
0.0000000000 0.9965269000 0.0000000000
0.0000000000 0.0000000000 0.9965207904
Can you tell me what the second matrix stage does?
The matrix varies according to the intent passed creating the transform. The
data above is for INTENT_PERCEPTUAL and INTENT_SATURATION (IIRC).
INTENT_ABSOLUTE_COLORIMETRIC uses other values, without offset.
INTENT_RELATIVE_COLORIMETRIC does not have this second matrix stage.
Best regards
Mark
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