Quoting jürgen sauerzapf <juer...@sauerzapf.name>:

> I like to draw an outline/ graphic of the maximum a/b values for a 
> speditiv L Value. Can somebody give me a hint how and where to start?

Is that for a given profile? If so, do a transform:

Lab -> Profile -> Profile -> Lab.

And then feed the transform with a sampling on Lab space,
where L*=your fixed value and varying a*/b* from -128 to +128.

The profile will clip out of gamut colors and you will get a estimation
of the maximum.

Regards
Marti



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