Re: Gamma Curves (was Profiling Cinema)
Re: Gamma Curves (was Profiling Cinema)
- Subject: Re: Gamma Curves (was Profiling Cinema)
- From: email@hidden
- Date: Fri, 9 Nov 2001 13:07:39 EST
Let me see if I've got this right. I opened OptiCal's Tools/Curves window,
unchecked Target & selected Uncalibrated. Now under the Graph Mode select
each various color curve and see where that curve lies. My Red and Green
pretty well align with each other while Blue is a straighter line slightly
offset. Going to the main window I changed the Targets and Curves to various
Gammas until I found that going Custom at Gamma 2.10 dropped the curve in
between the Red/Green and the Blue curve. That then should be the native
gamma of my monitor. Right???
This is interesting. I don't know if it really matters but interesting
approach to discovery.
Thanks,
Joe Butts
In a message dated 11/8/01 10:03:13 PM Pacific Standard Time,
email@hidden writes:
>
> I've somehow missed how to find out nmative gamma in OptiCal, is it
>
> pretty obvious or hidden ??
>
>
Well, this is how I do it:
>
Got to the curves dialog and uncheck all but the uncorrected curves. These
>
are the "native" gamma curves of the display. You can run thru the
>
individual RGB curves to find the one that's roughly the average of the
>
other two.
>
Now turn on the target curves and start trying different gamma values by
>
selecting them from the main Optical screen. You'll probably have to try
>
custom values to get a curve that overlays the native curve exactly.
>
Probably a bit crude but should give you a gamma value accurate to within
>
about .05 or so. Use this custom gamma value as your new target value. I
>
simply use Precal to find the native color temp.