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Tetrachromacy and how it relates to computer graphics

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CatalinaWOW:
In reply to the OPs question, no tetrachromatic people do not see our three color displays with less color than trichromats.

A close but imperfect analogy would be to ask:  Do people with 10 bit grey scale resolution see 8 bit images less vividly than people with 8 bit resolution?

Tetrachromats may find the three color displays less satisfying than trichromats, because they can see color differences in real life that can't be displayed on our three color screens and which trichromatic people don't complain about because they can't see the difference in real life.

Most of the discussion above is related to the differences between perfect representation of the real world and our displays.  I believe it is actually impossible to perfectly represent the real world for a variety of reasons, so there will always be arguments about how good "good-enough" is.  And that is without going into the lala land of audio-phoolery.  Video-phoolery?

BrianHG:

BrianHG:
I can't show you how pink this pink is...

CatalinaWOW:
A chromaticity diagram really makes understanding of this easier.  There are many colors that simply can't be represented by three phosphors.  Something like half of the color space is not represented by standard phosphors.  LEDs can cover more of the color space but still leave a lot of room.  And because the shape of the boundary of the diagram is a complex truncated archlike shape, adding phosphors (or LEDs) just improves the polygonal approximation.  And given the satisfaction achieved with three for most people it seems really unlikely that we will ever have systems with eight or sixteen monochrome LEDs just to get high 90s coverage of the color space.  But it might be fun as a research project to use an array of the TI Digital Light Valves to build such a display and then test people to evaluate benefit vs completeness of color coverage.

David Hess:

--- Quote from: NiHaoMike on February 26, 2023, 03:50:18 am ---For those who have 4 types of cone cells, do they see pictures on a computer screen significantly less colorful than the real world? If computer displays had 4 primary colors, would the majority with 3 cone cells see any difference in the colors?
--- End quote ---

The difference between tetrachromates and trichromates is the same as the difference between trichromates and dichromates.

Ask a dichromate sometime and they will say that there are colors that they cannot distinguish as they look like shades of the same color.  A tetrachromate can distinguish colors that look the same to a trichromate.

As pointed out above, one of the genes is sex linked, meaning that it is on the X chromosome, so only women can be tetrachromates, and that is why men, who only have one X chromosome, are more likely to be color blind; they lack a backup of the gene in question.

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