# Compute absolute L*a*b* for these RGB values.
# That's what your colorimeter should read, if
# you would print this patch and measure it.
$ xicclu -s255 -ia -ff -pl myprinter.icc
83.174370 109.314165 112.068420
83.174370 109.314165 112.068420 [RGB] -> Lut
-> 44.778623 0.026997 -3.770875 [Lab]
IMHO it would be nice, if "targen -d3 -c <profile> -g <steps> ..." would
not generate patches with R=G=B, but if it would instead create a ramp
of true neutral patches (i.e. a ramp of patches with a* = b* = 0 in the
PCS, according to the relcol intent of the given preliminary profile).
Yes, that thought has crossed my mind (or a way to increase the density
of sample points along the neutral axis even more than is done by default.)
It's not perfectly straightforward though, because the preliminary
profile has to be inverted within targen to do this, and what sample
points should be generated for CMYK, where there there can be
a variable amount of black used ? (ie. the black has to be sampled,
just like the rest of the distribution).
You could try bumping up #define NEF in targen.c to see if that
gives you something like the effect you are after.
