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> "No. You are done. Only people who are colorblind see numbers in the last pages." Do they have special ink and printers for color blind/ tetrachromats?
by random314 4y ago
> "No. You are done. Only people who are colorblind see numbers in the last pages."
Do they have special ink and printers for color blind/ tetrachromats?
- eru 4y agoNo need for that. Basically, you add noise to the picture that can only be picked up by non-colour-blind people.
- moring 4y agoCan a non-colorblind see the numbers in dim light, when color vision is "turned off"?
- eru 4y agoThere are multiple versions of colour-blindness. Most colour-blind people can still see colours. Only a small fraction is reduced to greyscale. Those pictures would likely be calibrated to the different versions of colour-blindness. Your idea might work for some pictures.
- lopis 4y agoIf the dotted image has a mixture of different hues and brightnesses, your brain only sees noise, while a color blind person doesn't see the different hues. The number is shaped only in brightnesses arrangement. However, I've been told my color blind friends that they don't work so well depending on your type.
- lb1lf 4y agoFor years, I had a poster which looked like your average Ishihara test in my office - an assortment of random dots. If you had normal colour vision, that is. If you were the right kind of deficient, though, it read 'Color vision? We don't need color vision where we are going!'