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404@lemmy.zip ⁨22⁩ ⁨hours⁩ ago

Fun fact! Since we (primates) have three cone cell types, we only really see three colours (red, green, blue). The rest are an illusion. Some animals, like fish and birds, have four or five cone cell types.

This means that for animals that have a cone cell type for yellow, an sunflower displayed on an LCD screen will not have the same color to them as a real sunflower. The screen will show a mixture of red and green (which we perceive as yellow) and NOT yellow.

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notabot@piefed.social ⁨16⁩ ⁨hours⁩ ago
Mantis shrimps seem to be the champions of this. They have between 12 and 16 different types of cones, spanning into the ultraviolet. They have a very different visual processing system to most animals though, so despite all the cones, they don’t seem to synthesise shades between them, so they probably don’t have a very vivid image.

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- rockerface@lemmy.cafe ⁨13⁩ ⁨hours⁩ ago
  They basically have most of visual processing offloaded to cones because of how simplistic their nervous system has to be.
  
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  - Rooskie91@discuss.online ⁨12⁩ ⁨hours⁩ ago
    You can actually distinguish colors better than a mantis shrimp.
    
    Turns out a lot of the processing that allows us to distinguish between colors happens in our huge brains. Take that, stupid shrimp!
    
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Viceversa@lemmy.world ⁨17⁩ ⁨hours⁩ ago
It’s more complicated than that. Colours are not some discrete things, it’s a spectra. Even one colour is a bunch of wavelengths.

So in truth each eye cone of ours perceives a spectre.

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tuxiqae@lemmy.dbzer0.com ⁨20⁩ ⁨hours⁩ ago
But real sunflowers are (and correct me if I’m wrong) yellow colored, so why LCD screens don’t do tue same thing? Is it because they are based upon RGB? If so, that kinda feels like an issue with screens and not with our lack of cones

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- 404@lemmy.zip ⁨20⁩ ⁨hours⁩ ago
  Yes! We developed screens to suit our eyes. Pixels look like this: b2c-contenthub.com/…/subpixels-monitor-types.jpg
  
  It’s not an issue, it’s just that they’re built to be viewed by three-cone creatures.
  
  Here is a great video by Steve Mould about cameras and true color: m.youtube.com/watch?v=-DyrBDsKA5s
  
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- Chapo_is_Red@hexbear.net ⁨20⁩ ⁨hours⁩ ago
  The TVs don’t have “yellow” cuz we don’t have the cones. TVs are built by humans for the use of other humans. Why would we design them to produce light that we don’t have the cones for?
  
  If we all only saw black and white, we wouldn’t have developed TVs with black and white. If we were all blind, we wouldn’t have developed TVs at all
  
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