I finally had some time to investigate what I am seeing. It appears that
the video lookup curves have a power curve on the gamma (straight gamma)
while the profile has a roll off in the blacks (follows the BT1886 from what
HCFR says) First I'd like to know which is correct (power curve or BT1886
for the profile), and second if the BT1886 roll off is correct, I'd to know
how to set my display calibration video LUT to match it (one so that images
viewed in non color managed programs will be a bit closer to correct, and
two so that "bits" arent used up doing level translations twice causing more
banding than necessary) I've posted an image here:
http://www.brandonbates.com/images/Color_profile_shadow_issues_img00001.jpg
(light dotted yellow is lookup table, solid yellow is profile, white dotted
is BT1886 gamma curve)
Thanks!
-----Original Message-----
From: argyllcms-bounce@xxxxxxxxxxxxx [mailto:argyllcms-bounce@xxxxxxxxxxxxx]
On Behalf Of Graeme Gill
Sent: Wednesday, June 07, 2017 12:49 AM
To: argyllcms@xxxxxxxxxxxxx
Subject: [argyllcms] Re: Color profile shadow issues
Brandon Bates wrote:
Hi,
I'm having a problem with color calibration VS color profiling.
I've only been able to
test on windows 10 on two different systems but regardless of the
calibration I run, when viewing through the profile in photoshop or
color managed programs the shadows are much brighter than the
calibration, which is not expected behavior.
I would expect
that the calibration be close to the profile with just some minor
shifts in color.