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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

    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
                    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

                      dsandler@mastodon.socialD This user is from outside of this forum
                      dsandler@mastodon.socialD This user is from outside of this forum
                      dsandler@mastodon.social
                      wrote sidst redigeret af
                      #29

                      @Danpiker what's fascinating about this is that, as someone with deuteranomaly, _none_ of the dots is obviously purple for me, on any background. they all seem "blue, but if you told me they're actually purple, I would believe you", which is just really common for me.

                      that must mean that the amount of short-wavelength sensitivity loss in the fixated area is not enough to offset the confusion (and overall lower information content) of overlapping long/medium wavelength response?

                      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

                        wcbdata@vis.socialW This user is from outside of this forum
                        wcbdata@vis.socialW This user is from outside of this forum
                        wcbdata@vis.social
                        wrote sidst redigeret af
                        #30

                        @Danpiker TIL (from someone who said "this doesn't really work") - this doesn't work if your phone has a blue-light-blocking filter on it!

                        crazyeddie@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

                          darkoptimism@mstdn.socialD This user is from outside of this forum
                          darkoptimism@mstdn.socialD This user is from outside of this forum
                          darkoptimism@mstdn.social
                          wrote sidst redigeret af
                          #31

                          @Danpiker
                          Nothing happens for me

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

                            @Danpiker i don't see it

                            crazyeddie@mastodon.socialC This user is from outside of this forum
                            crazyeddie@mastodon.socialC This user is from outside of this forum
                            crazyeddie@mastodon.social
                            wrote sidst redigeret af
                            #32

                            @conchoid @Danpiker I had to work pretty hard at it.

                            I had to open the many dots image alone and zoom in. Then if I stare at a dot really hard it does appear to be ever so slightly darker a purple than the rest.

                            My eyes hurt now and everything is blurry. Don't do this at home.

                            1 Reply Last reply
                            0
                            • forteller@tutoteket.noF forteller@tutoteket.no

                              @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 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
                              #33

                              @Danpiker OK, so now, looking at it on my phone, they're all purple! And the one I look at is only slightly darker purple. Wild stuff. 😅

                              1 Reply Last reply
                              0
                              • wcbdata@vis.socialW wcbdata@vis.social

                                @Danpiker TIL (from someone who said "this doesn't really work") - this doesn't work if your phone has a blue-light-blocking filter on it!

                                crazyeddie@mastodon.socialC This user is from outside of this forum
                                crazyeddie@mastodon.socialC This user is from outside of this forum
                                crazyeddie@mastodon.social
                                wrote sidst redigeret af
                                #34

                                @wcbdata @Danpiker Using a laptop. Yoga 910. Quick duck search leads me to believe there's no such filter on its screen. My night light shift software isn't on.

                                vOv

                                solitha@mastodon.socialS 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

                                  mstr_milktea@blorbo.socialM This user is from outside of this forum
                                  mstr_milktea@blorbo.socialM This user is from outside of this forum
                                  mstr_milktea@blorbo.social
                                  wrote sidst redigeret af
                                  #35

                                  @Danpiker

                                  Didnt see it until I put my phone back a lil further from my face. Cool!

                                  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

                                    pierre_pebble@mastodon.ieP This user is from outside of this forum
                                    pierre_pebble@mastodon.ieP This user is from outside of this forum
                                    pierre_pebble@mastodon.ie
                                    wrote sidst redigeret af
                                    #36

                                    @Danpiker this is absolutely wild! It definitely works for me

                                    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

                                      johncomic@beige.partyJ This user is from outside of this forum
                                      johncomic@beige.partyJ This user is from outside of this forum
                                      johncomic@beige.party
                                      wrote sidst redigeret af
                                      #37

                                      @Danpiker not really seeing it #MaybeThatsJustMe

                                      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

                                        keithwm@mastodon.socialK This user is from outside of this forum
                                        keithwm@mastodon.socialK This user is from outside of this forum
                                        keithwm@mastodon.social
                                        wrote sidst redigeret af
                                        #38

                                        @Danpiker 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

                                          zombiecide@polyglot.cityZ This user is from outside of this forum
                                          zombiecide@polyglot.cityZ This user is from outside of this forum
                                          zombiecide@polyglot.city
                                          wrote sidst redigeret af
                                          #39

                                          @Danpiker minimally, but the dots hurt because at the boundaries there are flecks greyish-whitish visual noise

                                          1 Reply Last reply
                                          0
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