red green color blindness simulation software

please suggest softwares that will simulate the vision of an image viewed by a red-green colour blind.

Answer 1

[John D'Errico]

Long ago I wrote tools for that purpose. Not that difficult to do.

I just started with the standard color blindness tests, measuring the patches. Converted to Lab. Those patches implied a 2-manifold in Lab that the protan (or deutan) can "see". Any other color gets mapped onto that 2-manifold. So I built a 3-d lookup table that did the mapping (again, all as Lab->Lab mappings.)

I used this scheme to build protan and deutan specific mappings, I think I did it for yellow-blue color blindness too, but it has been 25+ years since, so I no longer have any of these mappings around. (For those of you who remember the Kodak ColorSense package, these were all in the form of effects transforms.) I don't recall if the manifold was close enough to a planar subspace or not. But I do recall that subspace was pretty simple.

It did produce very pretty pictures that emulated what a person with the given variation of color blindness would see.

[Abira Banik]

thank you so much....

[John D'Errico]

I'm pretty sure the actual surface was a simple one, though I did look and no longer have the data I had measured. Surprisingly, I had scans of some plates from the HRR and Ishihara tests that I had used to verify my results. But no data that I could find.