novideo_srgb: GPU-side LUT-Matrix-LUT calibration

[Dato]

Synthetic displayP3 and rec.2020 working!

I want to understand why sRGB synthetic is not

Dont have a real device profile to test right now

If you dont understand inner workings of the program please dont reply

According to official readme on github regular sRGB icc from windows should work.

[Florian Höch]

sRGB to sRGB is a null transform.

[Dato]

Thanks for your answer

Like I understand it, its wide gamut to sRGB transform or its is not?

[Florian Höch]

Where should “wide gamut” come from in an sRGB to sRGB transform?

[Dato]

Wide gamut is from display?

Or the program doesnt know its wide gamut and assume sRGB, even if there is attached wide gamut profile in windows?

[Florian Höch]

If you set “Target: Rec709/sRGB” and “ICC profile: sRGB” in the novideo_srgb application, that’s a NULL transform. There is no “wide gamut”.

[Dato]

I only set sRGB icc profile in novideo_srgb, have a screenshot in my previous post, dont using edid primaries

[Florian Höch]

And what do you have set as “Target”?

[Dato]

I assume the target only working when you apply edid clamp?

If not then its my mistake, the ui of program not very clear

[Florian Höch]

No. Each color transform has a source (in this case called “Target”) and destination (in this case the display). You do not have a display profile, so you are limited to using EDID or a synthetic profile as destination.

[Dato]

Thanks for clarification!

When I click on “target” dropdown menu, program automatically select edid calmp and I assume its for edid only so confusing

I familuar with the basics of color management, but want to know all the details

[noiremk2]

So if I do a second profiling for the non-linear parts of my display, is it alright to set a specific white point or should everything in the first tab simply be “as measured”?

[noiremk2]

When I try to profile only after running novideosrgb, I’m presented with two options, “Use linear calibration instead” or “embed calibration curves in profile”, which would be correct for improving my novideosrgb results in managed programs?

[noiremk2]

So if I do a second profiling for the non-linear parts of my display, is it alright to set a specific white point or should everything in the first tab simply be “as measured”?

Also, not been able to get my white point closer to 65k, could I be doing something wrong? I have 6504k set and everything else to as measured.

[noiremk2]

This is where I’m stuck, what options should I be selecting for a profile pass after enabling Novideo SRGB?

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