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I am red-green colorblind and I found that none of the settings matched my perception, i.e. the modified images all looked strikingly different to me. None of t

I am red-green colorblind and I found that none of the settings matched my perception, i.e. the modified images all looked strikingly different to me. None of the tools that I've found online modify the image in a way that it looks unchanged to me. I have found specific examples of images that look the same to me (and that look very different to non-colorblind people), for example these images: http://www.huffingtonpost.com/2013/02/11/color-blindness-simulator-etre_n_2661631.html http://www.huffingtonpost.com/2013/02/11/color-blindness-sim... Since images like those probably came from one of the tools I tested, I'm guessing that there are certain failure cases that I only notice when I experiment with the tool directly.

VBprogrammer 12y ago
I'm also red-green colourblind. I've seen a few of these simulators before. As you've noticed, the simulation doesn't modify the examples in such a way that they are indistinguishable by our perception. I've always wondered whether that is a valid test though; is it necessary for the images to appear identical to us for it to recreate the perception of a colourblind person in someone with normal colour perception. It's not obvious to me that these are the same thing.
- jeremysalwen 12y ago
  That's a fair point, but on the other hand, how would you know that it's an accurate representation of what a colorblind person sees /except/ if this were the case? Perhaps people who had their colorblind status change, but I'm not sure if that's possible.