[argyllcms] Re: Capture video card gamma LUT to ICC profile
- From: Nikolay Pokhilchenko <nikolay_po@xxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Thu, 02 Feb 2012 13:07:53 +0400
Benjamin, You can buld any matrix profile with your calibration data by
ArgyllCMS colprof and at the next step open this profile with ICC Profile
Inspector http://www.color.org/profileinspector.xalter to edit the values in
new profile to exact values from your custom profile.
I think You can create an RGB test chart with targen -d3, then perform
fakereading of this chart with including calibratuin data in resulting ti3 file
(fakeread -k filename.cal), then colprof the last. You'll get the profile with
calibration in vcgtag. You can edit the matrix parameters of this profile by
ICC Profile Inspector.
02 fFeb 2012, 11:02 от Graeme Gill wrote:
> Benjamin Shadwick wrote:
> > I've used a software calibration utility called CLTest to generate a set of
> > LUT/gamma ramps that bring my cheap TN monitor closer to accurate sRGB, and
> > I would like to get that into an ICC profile so that I can have Windows 7
> > apply it as a system-wide LUT instead of having to depend on various
> > utilities to keep it uploaded into the video card for me.
>
> I'm not sure if it's quite what you want, but you can save the current
> cLUT using "dispwin -s filename.cal", and then feed that into
> dispread (dispread -k filename.cal ...) then colprof to
> create a profile that does what you want.
>
> There isn't a tool to set the vcgt tag on an existing profile, but you
> could fake it using fakeread then dispread using an existing profile.
>
> > Being able to dump the video card's current gamma ramp LUT into an ICC
> > profile would allow users to create custom profiles using any number of
> > software calibration tools that don't have native support for exporting to
> > that format.
>
> Hmm. "Custom Profile" ? Have you read this:
> <http://www.argyllcms.com/doc/calvschar.html> ?
> Where is the actual profile information going to come from ?
> (ie. the display characterisation ?)
>
> Graeme Gill.
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