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FARVEL BIG TECH
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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

    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
                            0
                            • mhwombat@mastodon.socialM mhwombat@mastodon.social

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

                              amosmulder@mastodon.socialA This user is from outside of this forum
                              amosmulder@mastodon.socialA This user is from outside of this forum
                              amosmulder@mastodon.social
                              wrote sidst redigeret af
                              #22

                              @mhwombat @Danpiker Interesting, I see both effects.

                              1 Reply Last reply
                              0
                              • davidtheeviloverlord@mastodon.socialD davidtheeviloverlord@mastodon.social

                                @Danpiker

                                Yes. Whichever dot I focus on turns purple.

                                clintruin@mastodon.socialC This user is from outside of this forum
                                clintruin@mastodon.socialC This user is from outside of this forum
                                clintruin@mastodon.social
                                wrote sidst redigeret af
                                #23

                                @davidtheeviloverlord @Danpiker
                                Same.

                                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

                                  beckermatic@mastodon.laB This user is from outside of this forum
                                  beckermatic@mastodon.laB This user is from outside of this forum
                                  beckermatic@mastodon.la
                                  wrote sidst redigeret af
                                  #24

                                  @Danpiker It also creates a blue trail when I scroll the image up and down. Neat!

                                  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

                                    axel_hartmann@digitalcourage.socialA This user is from outside of this forum
                                    axel_hartmann@digitalcourage.socialA This user is from outside of this forum
                                    axel_hartmann@digitalcourage.social
                                    wrote sidst redigeret af
                                    #25

                                    @Danpiker - where to use?
                                    guest bathroom wallpaper or <insert evil laughter> tablecloth

                                    axel_hartmann@digitalcourage.socialA 1 Reply Last reply
                                    0
                                    • axel_hartmann@digitalcourage.socialA axel_hartmann@digitalcourage.social

                                      @Danpiker - where to use?
                                      guest bathroom wallpaper or <insert evil laughter> tablecloth

                                      axel_hartmann@digitalcourage.socialA This user is from outside of this forum
                                      axel_hartmann@digitalcourage.socialA This user is from outside of this forum
                                      axel_hartmann@digitalcourage.social
                                      wrote sidst redigeret af
                                      #26

                                      @Danpiker or: legal texts

                                      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

                                        bytebro@mastodonapp.ukB This user is from outside of this forum
                                        bytebro@mastodonapp.ukB This user is from outside of this forum
                                        bytebro@mastodonapp.uk
                                        wrote sidst redigeret af
                                        #27

                                        @Danpiker

                                        Doesn't seem to 'work' for me. I have no colour blindness of which I'm aware!

                                        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

                                          itgrrl@infosec.exchangeI This user is from outside of this forum
                                          itgrrl@infosec.exchangeI This user is from outside of this forum
                                          itgrrl@infosec.exchange
                                          wrote sidst redigeret af
                                          #28

                                          @Danpiker

                                          a #ProTip for those playing along at home – if you have “night shift” (iOS) or “eye comfort” (Android) on you’ll probably need to turn it off to see the effect, otherwise all the dots will just look purple 💁‍♀️

                                          truenorthspice@mastodon.worldT 1 Reply Last reply
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