On Feb 18, 2008, at 5:40 AM, Rolf Gierling wrote:
Hello Chris, Florian,
Am 18.02.2008 um 03:28 schrieb Chris Murphy:
<snip>
Also, the data does not actually get converted to the PCS, ever. The
PCS is just a means to an end. It allows a colorworld to be created
between a source and destination space. Image data is converted
directly from source to destination. It does not actually get passed
through LAB or XYZ as an intermediary color space.
<snip>
Not true if you use relative colorimetric with black point
compensation.
At least using the Adobe products splits the transform into two
transforms
source -> Lab, Lab -> destination.
False.
Adobe's BPC is done in XYZ, not LAB. The correction is wedged between
the two profiles. A single colorworld is still created - not two. So
image data is converted directly from device1 values to device2
values. It's like a devicelink profile that has been created in memory.
Chris Murphy