[argyllcms] Re: How does the targen do the black generation with pre-conditioning profile?

Nikolay Pokhilchenko wrote:

When I use "targen -d4 -m6" I know, that all patches will be placed in device 
space at
nodes of linear 4-dimensional grid (6^4=1296 patches). In this case is no 
difference
which channel C,M,Y or K is. The path spread will be equal between channels. 
But what
is going on when I use "targen -d4 -c preprof.icc -A0.8"? Is there preprof.icc 
black
generation used? Which kind of black generation is in targen with 
pre-conditioning
profile? I know, that the keys -r and -R, -i and -I are lead to different 
spread in
device gamut. Is the black generation method depend on the any targen 
parameters?


There is no black generation for the targets. They explore the CMYK space - ie.
it's a 4 dimensional characterization of the device. Black generation is
done in the profile creation of the B2A tables.

Graeme Gill.

Other related posts: