[argyllcms] Re: Shadow detail problem
- From: Graeme Gill <graeme@xxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Sat, 02 Feb 2008 11:55:35 +1100
I have tried all 4 rendering intents with no noticeable change in
shadow detail. I have gimp setup to use sRGB colorspace (because gimp
is 8-bit per channel and because I usually print on Fuji lightjets
which have a gamut that is more similar to sRGB than the larger color
spaces.) I have the same results with profiles built with sRGB as a
source gamut and without.
It should be easy enough to determine that perceptual rendering
is different to colorimetric. Simply plot the neutral axis again
using xicclu -g -fb -ir.
However, if I build a shaper profile for the LCD panel instead of a
LUT, it does not do this. It has a similar response to the monitor
with calibration only loaded (shadow is distinguishable from black at
rgb 4,4,4). This shaper profile is built from the same 1500 patch
.ti3 file.
Sorry, no idea. Please send me the .ti3 file and the two profiles.
I was under the impression that a LUT was superior for an LCD panel.
This is an S-IPS panel, so maybe it's color response is well behaved
enough to just use a shaper profile...
It depends how well the LCD emulates a CRT. If it emulates additive
behaviour well, then a shaper/matrix may be sufficient.
Would generating a .ti1 file with gray axis patches in addition to the
normal iterative patches help the accuracy of the LUT profile in the
shadow region?
Probably.
Graeme Gill.
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