This is a bit disconcerting. It seems that the Dmax should remain the same for any given paper. If it doesn't, how can optimal results be achieved with all settings? And, there is a linerization problem in at least on case. SInce it's not great, maybe it could be compensated for by a good profile. But, I wonder if the variable dmax problem can be fixed.
Tom Baker
wwodets <odets@...> wrote:
In followup to the discussion on QTR Create ICC and and the shadow
compression issue I looked at the ABW driver settings. A selection
of "Light" (instead of the Neutral-Darker default setting) in ABW
produced the following numbers. These are for blacks at 90 to 100.
The ABW Light is shown first, the default ABW Neutral-Darker second
in parentheses:
HPR:
90 23.93 (18.42)
92 21.68 (17.69)
94 19.90 (17.21)
96 17.99 (16.94)
98 17.19 (16.69)
100 16.91 (16.80)
VFA:
90 24.67 (19.38)
92 22.72 (17.60)
94 20.68 (16.41)
96 18.63 (15.48)
98 16.66 (14.47)
100 14.19 (13.83)
Note that on both papers there is a slight reduction in Dmax with the
light setting. Both also showed similarly smooth curves above 90,
but the Light setting curves have a slight, smooth sag through the
midrange (darker).
I also tried the "Normal" driver setting (between Neutral-Darker and
Light) which does about what you'd think it would. The figures are
between the other two. It was just enough to undo the HPR reversal
(96=17.77, 98=17.15, 100=17.05)
What do others think about the ABW driver settings as a basis for
Create ICC profiling? My impression is that the Light setting is a
better starting point (linearization) for profiling.
Thanks,
Walt
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