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  3. This illusion was new to me.

This illusion was new to me.

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  • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

    This illusion was new to me. Does whichever dot you look at turn more purple?

    Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

    https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

    https://arxiv.org/abs/2509.11582

    conchoid@mastodon.gamedev.placeC This user is from outside of this forum
    conchoid@mastodon.gamedev.placeC This user is from outside of this forum
    conchoid@mastodon.gamedev.place
    wrote sidst redigeret af
    #2

    @Danpiker i don't see it

    pikestreet@ohai.socialP crazyeddie@mastodon.socialC truenorthspice@mastodon.worldT 3 Replies Last reply
    0
    • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

      This illusion was new to me. Does whichever dot you look at turn more purple?

      Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

      https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

      https://arxiv.org/abs/2509.11582

      mwichary@mastodon.onlineM This user is from outside of this forum
      mwichary@mastodon.onlineM This user is from outside of this forum
      mwichary@mastodon.online
      wrote sidst redigeret af
      #3

      @Danpiker Oh, wow. It does, and incredibly quickly and intensely, too.

      normaloperator@mas.toN 1 Reply Last reply
      0
      • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

        This illusion was new to me. Does whichever dot you look at turn more purple?

        Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

        https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

        https://arxiv.org/abs/2509.11582

        otacke@chaos.socialO This user is from outside of this forum
        otacke@chaos.socialO This user is from outside of this forum
        otacke@chaos.social
        wrote sidst redigeret af
        #4

        @Danpiker Where is the :hover pseudo-class set? 😅

        1 Reply Last reply
        0
        • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

          This illusion was new to me. Does whichever dot you look at turn more purple?

          Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

          https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

          https://arxiv.org/abs/2509.11582

          kcanales02@mastodon.socialK This user is from outside of this forum
          kcanales02@mastodon.socialK This user is from outside of this forum
          kcanales02@mastodon.social
          wrote sidst redigeret af
          #5

          @Danpiker
          Cool! Thanks for this.
          I recently watched a YT short on color theory. That was insightful and interesting.

          1 Reply Last reply
          0
          • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

            This illusion was new to me. Does whichever dot you look at turn more purple?

            Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

            https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

            https://arxiv.org/abs/2509.11582

            hypercube@social.linux.pizzaH This user is from outside of this forum
            hypercube@social.linux.pizzaH This user is from outside of this forum
            hypercube@social.linux.pizza
            wrote sidst redigeret af
            #6

            @Danpiker holy moly that's an incredible effect

            1 Reply Last reply
            0
            • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

              This illusion was new to me. Does whichever dot you look at turn more purple?

              Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

              https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

              https://arxiv.org/abs/2509.11582

              forteller@tutoteket.noF This user is from outside of this forum
              forteller@tutoteket.noF This user is from outside of this forum
              forteller@tutoteket.no
              wrote sidst redigeret af
              #7

              @Danpiker This is trippy as hell! I also feel like the border is more distinct when it's purple, but I can't really check because they all turn purple when I look at them! 🤯

              forteller@tutoteket.noF 1 Reply Last reply
              0
              • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

                This illusion was new to me. Does whichever dot you look at turn more purple?

                Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

                https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

                https://arxiv.org/abs/2509.11582

                davidtheeviloverlord@mastodon.socialD This user is from outside of this forum
                davidtheeviloverlord@mastodon.socialD This user is from outside of this forum
                davidtheeviloverlord@mastodon.social
                wrote sidst redigeret af
                #8

                @Danpiker

                Yes. Whichever dot I focus on turns purple.

                clintruin@mastodon.socialC 1 Reply Last reply
                0
                • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

                  This illusion was new to me. Does whichever dot you look at turn more purple?

                  Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

                  https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

                  https://arxiv.org/abs/2509.11582

                  cford@toot.thoughtworks.comC This user is from outside of this forum
                  cford@toot.thoughtworks.comC This user is from outside of this forum
                  cford@toot.thoughtworks.com
                  wrote sidst redigeret af
                  #9

                  @Danpiker Not at first, because I was wearing yellow-tinted sunglasses. When I took them off yes.

                  1 Reply Last reply
                  0
                  • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

                    This illusion was new to me. Does whichever dot you look at turn more purple?

                    Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

                    https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

                    https://arxiv.org/abs/2509.11582

                    ? Offline
                    ? Offline
                    Gæst
                    wrote sidst redigeret af
                    #10

                    @Danpiker Fascinating! If you force your focus slowly moving towards a circle you can even get a gradiant.

                    1 Reply Last reply
                    0
                    • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

                      This illusion was new to me. Does whichever dot you look at turn more purple?

                      Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

                      https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

                      https://arxiv.org/abs/2509.11582

                      arnebab@rollenspiel.socialA This user is from outside of this forum
                      arnebab@rollenspiel.socialA This user is from outside of this forum
                      arnebab@rollenspiel.social
                      wrote sidst redigeret af
                      #11

                      @Danpiker That’s neat! thank you!

                      1 Reply Last reply
                      0
                      • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

                        This illusion was new to me. Does whichever dot you look at turn more purple?

                        Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

                        https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

                        https://arxiv.org/abs/2509.11582

                        bltpizza@mastodon.socialB This user is from outside of this forum
                        bltpizza@mastodon.socialB This user is from outside of this forum
                        bltpizza@mastodon.social
                        wrote sidst redigeret af
                        #12

                        @Danpiker Holding my phone at arms length all of the dots are purple.

                        1 Reply Last reply
                        0
                        • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

                          This illusion was new to me. Does whichever dot you look at turn more purple?

                          Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

                          https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

                          https://arxiv.org/abs/2509.11582

                          daniel_bohrer@chaos.socialD This user is from outside of this forum
                          daniel_bohrer@chaos.socialD This user is from outside of this forum
                          daniel_bohrer@chaos.social
                          wrote sidst redigeret af
                          #13

                          @Danpiker interestingly it works better for me on the smaller thumbnail than on the full version of the image

                          1 Reply Last reply
                          0
                          • conchoid@mastodon.gamedev.placeC conchoid@mastodon.gamedev.place

                            @Danpiker i don't see it

                            pikestreet@ohai.socialP This user is from outside of this forum
                            pikestreet@ohai.socialP This user is from outside of this forum
                            pikestreet@ohai.social
                            wrote sidst redigeret af
                            #14

                            @conchoid @Danpiker this has never worked for me either!

                            1 Reply Last reply
                            0
                            • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

                              This illusion was new to me. Does whichever dot you look at turn more purple?

                              Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

                              https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

                              https://arxiv.org/abs/2509.11582

                              mhwombat@mastodon.socialM This user is from outside of this forum
                              mhwombat@mastodon.socialM This user is from outside of this forum
                              mhwombat@mastodon.social
                              wrote sidst redigeret af
                              #15

                              @Danpiker For me, the dot that I'm looking at doesn't change, but the remaining dots fade into the background.

                              amosmulder@mastodon.socialA P 2 Replies Last reply
                              0
                              • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

                                This illusion was new to me. Does whichever dot you look at turn more purple?

                                Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

                                https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

                                https://arxiv.org/abs/2509.11582

                                philsalkie@mindly.socialP This user is from outside of this forum
                                philsalkie@mindly.socialP This user is from outside of this forum
                                philsalkie@mindly.social
                                wrote sidst redigeret af
                                #16

                                @Danpiker

                                Have a look at:

                                https://gamesx.com/misctech/visual.htm

                                Your eyes have much lower resolution in blue light than in red or green, the article demonstrates that increasing the size of the blue pixels by 9 times (3x3) makes an almost imperceptible change in the image. Link rot has taken the extra images and a diagram showing a proposed pixel layout of a big blue diamond surrounded by small red and green squares.

                                eliocamp@mastodon.socialE 1 Reply Last reply
                                0
                                • philsalkie@mindly.socialP philsalkie@mindly.social

                                  @Danpiker

                                  Have a look at:

                                  https://gamesx.com/misctech/visual.htm

                                  Your eyes have much lower resolution in blue light than in red or green, the article demonstrates that increasing the size of the blue pixels by 9 times (3x3) makes an almost imperceptible change in the image. Link rot has taken the extra images and a diagram showing a proposed pixel layout of a big blue diamond surrounded by small red and green squares.

                                  eliocamp@mastodon.socialE This user is from outside of this forum
                                  eliocamp@mastodon.socialE This user is from outside of this forum
                                  eliocamp@mastodon.social
                                  wrote sidst redigeret af
                                  #17

                                  @PhilSalkie @Danpiker Huh. Does this means that we shouldn't be writing small text or rendering small details in blue?

                                  philsalkie@mindly.socialP 1 Reply Last reply
                                  0
                                  • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

                                    This illusion was new to me. Does whichever dot you look at turn more purple?

                                    Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

                                    https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

                                    https://arxiv.org/abs/2509.11582

                                    rletot@mamot.frR This user is from outside of this forum
                                    rletot@mamot.frR This user is from outside of this forum
                                    rletot@mamot.fr
                                    wrote sidst redigeret af
                                    #18

                                    @Danpiker
                                    Amazing, I feel like my smartphone can track my eyes 😃

                                    1 Reply Last reply
                                    0
                                    • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

                                      This illusion was new to me. Does whichever dot you look at turn more purple?

                                      Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

                                      https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

                                      https://arxiv.org/abs/2509.11582

                                      howtophil@mastodon.socialH This user is from outside of this forum
                                      howtophil@mastodon.socialH This user is from outside of this forum
                                      howtophil@mastodon.social
                                      wrote sidst redigeret af
                                      #19

                                      @Danpiker It turns... a slightly darker blue, I think?

                                      1 Reply Last reply
                                      0
                                      • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

                                        This illusion was new to me. Does whichever dot you look at turn more purple?

                                        Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

                                        https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

                                        https://arxiv.org/abs/2509.11582

                                        cherieherrjones@mastodon.socialC This user is from outside of this forum
                                        cherieherrjones@mastodon.socialC This user is from outside of this forum
                                        cherieherrjones@mastodon.social
                                        wrote sidst redigeret af
                                        #20

                                        @Danpiker I definitely see it. Very cool!

                                        1 Reply Last reply
                                        0
                                        • eliocamp@mastodon.socialE eliocamp@mastodon.social

                                          @PhilSalkie @Danpiker Huh. Does this means that we shouldn't be writing small text or rendering small details in blue?

                                          philsalkie@mindly.socialP This user is from outside of this forum
                                          philsalkie@mindly.socialP This user is from outside of this forum
                                          philsalkie@mindly.social
                                          wrote sidst redigeret af
                                          #21

                                          @eliocamp @Danpiker
                                          It probably means not just that but we should be compressing the blue layer much more than the green or red when doing lossy compression algorithms.

                                          1 Reply Last reply
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