On 22 Sep 2017, at 13.37, Gerhard Fuernkranz <nospam456@xxxxxx> wrote:
The intent -ipa is likely close to your desire, it is obviously supposed to
preserve the CIECAM02 appearance, and additionally does gamut compression.
As with all CIECAM02-based intents, you need to specify the source and
destination viewing conditions with the options -c... and -d..., and you
can also override the source and destination adapted white points with
the command line optiosn -cw:... and -dw:...
However, on the command line, you cannot override the "D" parameter of the
CIECAM02 model (-> degree of adaptation), it is always calculated
automatically
from the other specified viewing condition parameters. Typically, the
calculated
value lies in the 0.8...0.9 range. If you want to force it to 1.0, then it
seems
you need to patch xicc/ciecam02.c.
With the patched code and overriding -cw:... and -dw:... I can obtain an
almost
perfect perceptual D50 gray axis with collink.
[ However, different from the commercial "neutral" profiles, even paper white
itself gets neutralized by printing yellow ink, while the gray axis of the
commercial
profiles still cheats, beding from D50 towards blue-ish paper white in the
upper
20% of the axis. ]
Regards,
Gerhard
