I was just thinking that sounded remarkably like Trump.
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This scenario implies tetrachromats perceive a four-dimensional color space.
Colorblind people see all the same colors I do, they just canât tell the shades apart?
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I thought you only got 0.5 knobs per teste.
/runs
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The Internet is yours!
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Radiolab did a thing on colour, and found that a trichrome (male) artist was able to distinguish the test colours just as well as their trichrome lady.
Is this womanâs ability really outside of the theoretical? She sounds like a bit of a promoter, which instantly makes me suspicious.
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Thatâs not a precise way to think of it, but itâs close. Follow arteitleâs link on Metamerism.
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I agree with the dislike of her hubris, but there is another way to interpret âI see colors you cannot perceiveâ than you have made. Take a look at the link to metamerism that arteitle posted. Her comments donât have to be interpreted to be âspectral colorsâ. âColorsâ generally refers to a full spectral response, not a single frequency. In that more general case of non-spectral colors, tetrachromats can indeed tell appart colors that trichromats cannot.
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Thanks for that link - most interesting. I actually gave it a real shot, took ten minutes to line up the colors.
And got a 66/ 100 (where 0 is best, 100 is presumably colorblind).
No wonder my co-workers blanch when they see my choice of clothing colors each day - apparently mismatching close shades is a no-no.
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Just because Alice and Bob both perceive the same range of wavelengths of electromagnetic radiation as light doesnât mean they âsee the same colors.â
When we talk about colorblindness, we mean that some people cannot distinguish some combination of wavelengths from some other combination of wavelengths, while other people can distinguish them.
Itâs not about whether you can see the light at all.
Thatâs not colorblindness, thatâs regular blindness blindness.
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thanks for the link on metamerism that was a fascinating read!
yeah, i would have brushed off her comment except the last bit âthat you canât even imagineâ stuck in my craw. donât tell me what i can and can not imagine! 
hee hee.
yeah, most of her quotes come off this way.
agreed! 
she seems to be a little blind to how other people see her.
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Iâve gotten zero on that test the two times Iâve done it. The slight differences in shade just pop-out to me (albeit subtly). I wonder if anyone has investigated whether the results in this colour test can help to predict those with an extra cone.
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My mother and brother are both super tasters and both have very conservative tastes. It led to a lot of mild cheese and no spices while growing up (which honestly probably wasnât too different to the norm in New Zealand in the 80s. People made pizza with canned spaghetti and sausages on top FFS).
Sometimes factors the screen or lighting can make a difference. Iâve had a perfect score before, but two of my brothers are RG colour blind (I havenât sent them this link yet though).
This may seem like a silly question⌠There are a few sites that show how things look for people with different kinds of colour blindness. Do those people see any difference between the âtypicalâ photo and the altered one corresponding to their type of colour blindness?
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I am dueteroptic. I can see clear differences between the typical and the Protanope and Tritanope images. I can say that the deutanope image differes, but I might not if I wasnât specifically looking for a difference. Also, I canât say what the difference is just that the Typical image seems a trifle more vivid.
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I can see grellow, blooj, and durple and you canât.
You donât know what your missing, suckers.
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The mantis shrimp/human DNA splicing was a success
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But⌠canât you see colors that a red-green colorblind person canât see? The way I understand it, objects reflect a number of different wavelengths of light at the same time. Thatâs the way you can see a certain shade of pink, https://www.youtube.com/user/minutephysics/about, which is not an actual wavelength, but a mix of wavelengths that activate your red and blue but not green color receptors (wavelengths at both ends of the spectrum simultaneously.) Canât you imagine a colorblind person saying the same thing, âshow me a color I canât see?â This lady can differentiate between different MIXES of wavelengths, which the brain INTERPRETS as new colors, perhaps. Iâve always thought it would be fascinating to be able to see all wavelengths an object reflects simultaneously (even just in the visible spectrum.) Thereâs so much more information there even in the visible spectrum than people actually detect. Ears are âdesignedâ to detect many frequencies at once, (not just three,) but of course the ear isnât as good as the eye at determining where the different sources are coming from and making them into a spatial image like the eye.
Yes I can imagine that, and I can show them photo examples, some have even been posted to this thread.
To my knowledge the fourth cone does not act that way. If you are missing a red, blue, or green color receptor cone you do indeed miss part of the visual spectrum. what new primary color does this extra cone introduce into the mix? the answer is none. it increases photo sensitivity, which donât get me wrong is awesome, but not as awesome as the lady is selling it as. Remember that this isnât a rare mutation (2%-25% of people). some animals have a fourth cone more to the ultraviolet or infrared expand their color perception and visual range, the fourth cone in humans is not that nor does it function that way.
the fourth cone in humans is between existing cones so it increases sensitivity to the differentiation between those two peaks.
https://en.wikipedia.org/wiki/Tetrachromacy/
The mantis shrimp on the other hand can indeed see more colors then we can. It actually has the hardware for it.
They do have camera sensors that can do this. One can view an isolated part, or shift things to see non-visible parts.
an infrared heat map is a wonderful example of a part of the spectrum we cannot see being shifted and expanded/translated into the visual range so that we can see rainbow colors representing various amounts of infrared.
these techniques are used in astronomy all the time, we have xray and radio wave telescopes etc. we can tell what elements distant stars are made of because we can analyze the emf spectrum from them. spectral analysis is super handy and humans are awesome and taking things too small, too large, too far, too quite, too whatever and inventing devices that allow us to view and analyze them even though they are outside the perception of out nature provided hardware. yea humans!
mantis shrimp:
birds:
human tetrachromat:
notice how the fourth peak doesnât extend past the blue or red peaksâŚso it isnât expanding our color perception range.
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