Suppress "blue turns purple problem" in color data

[mihas]

R.W.G. HUNT writes that the "blue turns purple problem" is embedded in the trichromatic principle itself (and not only is a cost of the CIE Lab), and its degree depends on the nature of the spectral sensitivity curves of sensors and/or spectral reflection (transmission) curves of dyes.

"When a color is reduced in chroma to fit within a destination gamut, following a line of constant metric hue angle (e.g., CIELAB h), the perceived hue of that color will change if the reference color space is non-linear with respect to hue. This
has ben shown for the CIELAB color space (Hung and Berns (1995), Ebner and Fairchild (1998))". (Gustav J. Braun, Mark D. Fairchild, Fritz Ebner: Color Gamut Mapping in a Hue-Linearized CIELAB Color Space).

Present here suppress "blue turns purple problem" in color data.

 

[Puch]

How to use this tool for practical purposes? Can I calculate a superior FOGRA XX profile from the original dataset with iccGPU?

 

[mihas]

Can I calculate a superior FOGRA XX profile from the original dataset with iccGPU?

Yes. You can calculate profile from the original FOGRA-ECI dataset. Examples of such profiles based on standard FOGRA colorimetric data are presented here (profiles with iccGPU in the name suffix).

 

[Puch]

Thank you, very interesting.