How to create 3×3 colour matrix ICC profile?

[Marcin Piotrowski]

Hello,
Question from somebody with very limited experience with icc system (profiling displays and nothing more).

I’m aware icc profile can consist of only 3×3 colour matrix transform. I would like to be able to create such profiles that would get me from one colour space to another one: lets say from acescg to arri wide gamut 4.
It boils down to using ICC profile as a substitute in an environment that do not support 3×3 matrix luts.

[Vincent]

I’m aware icc profile can consist of only 3×3 colour matrix transform.

It is not a transform, it’s a description of colorspace primaries. 1 primary = 3 CIE XYZ values. 3 primaries, 9 XYZ coords.
Transform RGB numbers from colorspace A to B is responsibility of each implementation of color management engine, not profile’s.

Transfrom stored on profile is ChAd, chromatic adaptation matrix, from device whitepoint <-> D50

If that enviroment you describe has no suport for LUT3D or ICC CMM… there is nothing you can do other that code it or use some free CMM.

• This reply was modified 1 year, 6 months ago by Vincent.

[Marcin Piotrowski]

thank you.
all clear now.

[NoVoicemail]

https://haraldbrendel.com/colorspacecalculator.html

you can create colorspace matrix using this.

[Marcin Piotrowski]

thanks.

[Author]

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