My phone is normally worse for color gradients and contrasts than my eyes. Also, normally it has worse nightvision.

But when decreasing the shutter speed, for example in OpenCamera, I get crazy night pics.

I see that when its dark my FPS goes down, I see less frames automatically and totally cant control that.

Could this mechanism be altered, to have even less FPS but more photons in the soup to get brighter sight?

Yes, trying to hack my eyes here. “Getting used to darkness” is normally the pupils getting wider, there are quite some interesting plants to do that but I havent heard of anything altering the brains image processing.

Edit

I learned:

  • in Nightsight we use the rod cells, which take longer to send a signal. That way they capture more photons, but the “FPS” is lower
  • you can trick your iris naturally to stay open, like the Pirates did (some plants like nightshades also do this, applied locally)
  • Max-P@lemmy.max-p.me
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    1 year ago

    Eyes don’t really have a concept of FPS because we don’t have shutters in the first place. The brain is just continuously interpreting what we see. And it fills in a lot of gaps: for example, we technically have a large blind spot right in the middle of the retina, and that’s why we’re more sensitive to movement in our side vision.

    Cats see just fine in the dark, our eyes are just not sensitive enough to low light to be all that useful for us, but we could, if the eyes provided that input. Evolution just made it so we favored speedy and sharp vision in daylight rather than night vision, in part because we quickly developed technology (fire) to keep our areas lit as needed.

    • hikaru755@feddit.de
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      1 year ago

      we technically have a large blind spot right in the middle of the retina, and that’s why we’re more sensitive to movement in our side vision.

      You’re conflating the blind spot and the macula there.

      We do not have a blind spot in the middle of the retina. If that were the case it would be pretty problematic for vision. What we do have is what’s called the Macula, an area of high concentration of cones and low concentration of rods. Cone cells give us highly detailed color vision, while rod cells only give us overall brightness, but are much more sensitive to light. That’s why, as you mention, we’re more sensitive to movement in our peripheral vision, and also why the center of our vision performs way worse in very low light situations. (Ever seen a faint star that seems to vanish when you try to look right at it? That’s why)

      We do actually have a fully blind spot, but that one sits not at the center of the retina, but off to the side. It’s where the optic nerve enters the retina, and it doesn’t have anything to do with better/worse perception of movement, it’s just fully blind and always gets interpolated by the brain, it literally fills it up with what it thinks should be there. If you get a small object right into that spot for one eye and cover the other eye, it will just disappear.

    • Chriszz@lemmy.world
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      1 year ago

      But cats have even faster sight. I think the avg reflex time for a cat is around 70-80ms while humans are over twice that. So it seems like their vision is entirely better. Why didn’t our eyes evolve to be like theirs?

      • MentalEdge@sopuli.xyz
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        1 year ago

        Feline vision has drawbacks, and some adaptations we don’t.

        For one, cats have reflective eyes, rather than absorb light, that misses any cones/rods, cats reflect it back out, passing the light that comes into their eyes through their retinas twice. This improves how much of the light actually hits the light sensitive cones and rods in their eyes.

        Second, cats have slitted pupils, this means they have a MASSIVELY larger range of light they can adjust to let into their eyes. Slitted pupils are able to close much tighter, and open much wider, than circular ones. If you’ve ever seen a cats eye in the dark, you know their pupils get HUGE. Several times that of humans.

        As for a drawback, cat eyes suck at focusing. All cats are far-sighted. At less than about 20 cm, cats cannot see. All they get is a blurry mess. Ever wondered why your cat seems completely clueless when you set down a treat right in front of it? That’s why.

        This is why cats have whiskers. Close up, they go 100% by smell, hearing and feel!

      • tetraodon@feddit.it
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        1 year ago

        Because evolution settles for the good enough (to let you survive and have children that survive) rather than the best.

      • Norgur@kbin.social
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        1 year ago

        Because our sight was never enotofna disadvantage that the humans with bad vision got killed off fast enough and the ones with better vision got to procreate more. Simple as that.

      • DogMuffins@discuss.tchncs.de
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        1 year ago

        Well yeah, every animal has different features which make assist it to exploit whichever evolutionary niche it inhabits.

        Maybe maintaining such fast reaction times just isn’t possible with larger brains, or higher executive functions.

    • NightAuthor@lemmy.world
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      1 year ago

      And by blind spot, you’re referring to the small portion of the vision that sees color and is much much much less sensitive to light (thus horrible at night vision) right?