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is that true
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Jul 17, 2020 02:49
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fart simpson posted:is that true not quite. iirc from my former life as a digital camera hardware design person, the human eye can see something around 10 million colors according to the studies that were used to define various srgb color gamuts 24 bit color depth is 16.7 million different combinations of bits. that seems like enough, but there are a lot of differences. just comparing the number is incomplete. it probably depends on the pixel format you are using. RGB888 uses 8 bits per pixel, but the human eye is twice as sensitive to green shades as red or blue, so if you really want to represent colors that humans can see you might want to use more bits for green, for example. this is why the bayer image sensor (the most common sensor layout for digital cameras) uses a repeating grid of four squares, with two green pixel sensors for every blue and red sensor. also some people’s eyes respond to slightly different frequencies, depending on genetics. for example, some people have cones that are sensitive to different frequencies, and some women may have tetrachromacy, where they could detect light between the red and green frequencies that most people see, and rod cells mght also contribute to color vision in some circumstances. eyes and pixels are really very different ways of sampling and encoding color vision so comparing “number of possible combinations” is too simplistic
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Jul 17, 2020 03:19
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the wackiest thing about color vision to me is that pink light doesn't exist. we all know what a color wheel looks like, and it's obvious how the colors blend  but uh where on the electromagnetic spectrum does it wrap from red to violet, again?  every color of the rainbow can be represented by a discrete wavelength of monochromatic light, but pink only exists as what our brains have decided a combination of red and violet light should look like.
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Jul 17, 2020 03:56
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a bit saved is a bit earned
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Jul 17, 2020 04:26
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Sagebrush posted:the wackiest thing about color vision to me is that pink light doesn't exist. also like, brown kinda doesn't exist depending on how you define it https://www.youtube.com/watch?v=wh4aWZRtTwU
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Jul 17, 2020 04:54
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EIDE Van Hagar posted:not quite. nerd
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Jul 17, 2020 05:30
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brains are weird
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Jul 17, 2020 05:58
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EIDE Van Hagar posted:not quite. 
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Jul 17, 2020 22:03
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Sagebrush posted:the wackiest thing about color vision to me is that pink light doesn't exist. this makes sense. the spectrum is pure frequencies, and it seems totally reasonable that compound signals would manifest differently. music works the same way
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Jul 17, 2020 23:50
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 Pardot posted:also like, brown kinda doesn't exist depending on how you define it orange is just bright brown Sagebrush posted:the wackiest thing about color vision to me is that pink light doesn't exist. reminder that colour as a concept only exists within our subjective experience
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Jul 18, 2020 00:16
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maybe we all see colours differently? maybe what i see as red is someone else's blue 
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Jul 18, 2020 00:45
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actually i remember reading a while back that everyone’s brains seem to respond in a similar enough way across the board to a given colour that the researchers seemed confident to say “yup, everyone probably sees colour x the same way more or less”
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Jul 18, 2020 01:43
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we only need about 34 bits but the enemy has figured out 52 bits so we have to press on
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Jul 18, 2020 13:49
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