[argyllcms] Re: Color errors on < 100% stimulus
- From: János, Tóth F. <janos666@xxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Fri, 10 Feb 2012 15:08:09 +0100
XYZ and Lab profiles can do that.
But you need to measure a lot of points and there is a big problem
with plasma: Average Brightness Limiter. It rescales the gradient,
causing tonal response and other color fluctuations. You can't correct
for that.
If you profile your display with small windows patterns, those will
measure nicely through the profile evaluation but you will get high
errors with bigger window sizes using the same profile.
It would require a huge and power-hungry 4D LUT processing to correct
for that (built from an insane amount of measurements).
2012/2/10 Kristian Jörg <krjg@xxxxxxx>:
> I have a question regarding monitor profiling versus calibrating HomeTheater
> displays.
>
> When I calibrate my Panasonic VT30 plasma (not connected to a PC) with an
> external program i.e ChromaPure I get dE errors in the range of 1.0 or less.
> The color calibration is done at 100% stimulus. But when I check the color
> balance at 75% stimulus I get errors of about 10 dE! Ouch! There is no way
> of correcting that in the TV set's controls even though it has a very
> thorough CMS module.
>
> The question is when profiling a PC display with Argyll (or similar
> profiling software), does it correct color at different levels of stimulus
> or only at 100%? I.e if I would us my TV set as a PC monitor would the
> profile correct the color balance from 0-100% stimulus?
>
> --
> Med vänlig hälsning
> Kristian Jörg
>
> Devo IT AB
> Tel: 054 - 22 14 58, 0709 - 15 83 42
> E-post: kristian.jorg@xxxxxxx
> Webb: http://www.devo.se
>
>
>
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