• ulterno@lemmy.kde.social
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    5 months ago

    Except that there is. Alright, maybe not exactly, but…

    The whites that you see as white (in the other white parts which don’t seem red), are shifted like #E0F9F8. Notice the reduced reds there.

    The whites you see as red are shifted like #F9F9F7. This one, I’d probably call yellow, but you get the point, reduced blues. There’s probably a better example pixel in there and I just haven’t found it.

    The red pixels in the thumbnail, well, maybe JPEG downscaling? I can’t say, because I don’t know what downscaling algorithm is being used.


    So the parts you see as white, are actually bluish white in a sea of blue (Cyan is just mixtures of blue and green in case of RGB) and the part you see as red, are reddish white, in a sea or blue.

    Also, for those who don’t see red, don’t look straight at the image. Look at something near it, with the image in your peripheral vision and you’ll get what others are saying. But I guess that happened while you were reading the title.

  • chonglibloodsport@lemmy.world
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    5 months ago

    Nonsense. My phone screen uses red, green, and blue to make up each pixel. The white pixels have their red component all the way at full brightness. Therefore there is a lot of red in the picture.

    You could also see this by opening up the image and looking at the red channel which would not be completely black.

    • Valmond@lemmy.world
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      5 months ago

      Texts on computers is made this way, so use a magnifying glass on black white text in a word document (for example) and you’ll see lots of colors. zoom in using the computer and you will still just see black/white.

      • lad@programming.dev
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        5 months ago

        So that’s why I can’t print greyscale documents when my yellow ink is too low!

        • Valmond@lemmy.world
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          5 months ago

          Ha ha nah thats because all (color) printers also print a unique pattern with yellow, so that anything from your printer can be traced back to it

          Can plz anyone find a link (am at home with wrecked right arm)?

  • NigelFrobisher@aussie.zone
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    5 months ago

    It’s actually all just white light at different wavelengths, which tricks your brain into seeing different “colours”.

    • vonbaronhans@midwest.social
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      5 months ago

      White light is the combination of all those wavelengths. It is only the combination that makes it “white” in exactly the same way that a smaller range of wavelengths are “red” or “blue”.

    • 2pt_perversion@lemmy.world
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      5 months ago

      White light has red in it. Cyan does not. We fatigue blue and green cones everywhere but the white can, and we only stimulate the red cones on the white can. The result is it looks red.

  • HuntressHimbo@lemm.ee
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    5 months ago

    Jokes on you, I’m moderately red green colorblind so I wouldn’t realize it if there was red present

      • RunawayFixer@lemmy.world
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        5 months ago

        I’m red green colorblind as well. I just see the background as white or a very light shade of grey. Someone else has made a post with a yellow can and in that one I see the background as yellow (which is basically the same as green to me, I have very little r in my rgb), especially the right side of the can.

      • bolexforsoup@lemmy.blahaj.zone
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        5 months ago

        Color dropper shows there is full red and blue/green are pulled back. It’s slight, but it’s there. Didn’t say it did much but clearly it was enough for me to notice lol

      • xthexder@l.sw0.com
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        5 months ago

        I think what we actually need is someone to take a picture of their screen with a microscope while the image is zoomed out.

        Based on some comments I’ve seen, it seems likely this is just an artifact of how the red/green/blue pixel layouts work when drawing the edges of white things.

        Edit: I don’t have something to check the actual display pixels, but I realized I could just rotate the image and see if the colors change, which they don’t. So this definitely seems like more of a white balance effect, similar to that old Gold/Blue Dress meme.

        • bolexforsoup@lemmy.blahaj.zone
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          5 months ago

          You can use a color picker*, and unlike the gold/blue dress meme we are all looking at the same image and don’t have to determine one singular source vs. shared ones that have changed due to screenshotting/compressing/people just messing with folks

          • xthexder@l.sw0.com
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            5 months ago

            You can’t use a color picker see color fringing due to subpixel rendering. (There’s tons of info about this for font rendering). Your display doesn’t map pixels 1-to-1 in most cases. But like I said in my edit, I’m fairly sure that part is irrelevant here.

            The blue/gold dress was not related to screenshotting and compression. People were arguing about the color even when looking at the exact same image. It all depends on which color temperature the dress was lit with. Noone can know for sure, and your brain just picks one (maybe depending on the room you’re in).

            It’s the same sort of deal as those rotating optical illusions. It’s possible to see it both ways, but your brain usually picks one and it’s hard to switch.

            • bolexforsoup@lemmy.blahaj.zone
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              5 months ago

              Screenshotting, compression, people screwing with people, different monitors, different phones, etc. all contributed to the confusion ultimately. It’s not accurate to say we were all looking at the same image with the dress. But yet those visual/mental phenomenons are also real.

              • xthexder@l.sw0.com
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                5 months ago

                I wasn’t saying everyone was looking at the same image. I’m saying the optical illusion still works when using a single image.

  • warm@kbin.earth
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    5 months ago

    I only see the red when its small, in the thumbnail its red, but when I open the image its very black and white.

    The white has more red in it than green and blue, so that’s probably the cause of the illusion.

  • ladel@feddit.uk
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    5 months ago

    If you zoom in to see that it’s black and white, and then zoom back out again, it stays black and white. But if you look away for a bit to forget, maybe change the angle you’re looking at it, it turns red again.

    • xionzui@sh.itjust.works
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      5 months ago

      I think it probably depends a bit on the color persistence effect. Like when you stare at something then look away, you see the opposite color. This effect probably requires the parts of your eyes that were looking at cyan to move over the white area and create red. So if you look at it without moving your eyes, it doesn’t work