[argyllcms] Re: Capture video card gamma LUT to ICC profile
- From: Nikolay Pokhilchenko <nikolay_po@xxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Sat, 04 Feb 2012 08:31:52 +0400
04 Feb 2012, 05:41 Benjamin Shadwick wrote:
>
> There must be some complex stuff going on under the hood, as I did notice
> that the XYZ values in the Argyll-generated ICM profile are different than
> the ones in the base profile, and I also noticed that the gamma ramps
> described by the calibration table stored in the Argyll-generated ICM profile
> vary slightly from what I dumped from the video card LUT.
>
I've advice You to tune XYZ values in Argyll-generated ICM by Profile Inspector
exactly for this reason. You can change XYZs (and gamma too) to their original
values. This can improve the profile tolerance a bit.
>
> On Fri, Feb 3, 2012 at 5:08 PM, Graeme Gill <graeme@xxxxxxxxxxxxx> wrote:
>
> Benjamin Shadwick wrote:
>
> > As for editing the XYZ values, I wouldn't know what I'm doing or why I
> > should do it. If the argyllcms-generated profile has calculated the XYZ
> > values based off of the LUT data, then wouldn't that be more appropriate to
> > use than the XYZ values from the generic profile provided by the monitor
> > manufacturer for my model of monitor?
>
> I suspect you are confusing calibration and the profiling.
> The calibration table will simply be stored in the profile.
>
> The Argyll profile is created by looking up the colors in
> your original profile (ie. sampling the original profile
> matrix model).
>
> Graeme Gill.
>
>
>
>
> --
> - Ben S.
>
>
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