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AkiyoshiKitaoka's profile
Akiyoshi Kitaoka
Akiyoshi Kitaoka
Akiyoshi Kitaoka
@AkiyoshiKitaoka

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Akiyoshi Kitaoka

@AkiyoshiKitaoka

I am an experimental psychologist who studies visual illusions as well as makes illusion artworks. #illusion #opticalillusion #perception #錯視

Kyoto, Japan
ritsumei.ac.jp/~akitaoka/inde…
Joined December 2011

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    1. Akiyoshi Kitaoka‏ @AkiyoshiKitaoka 26 Nov 2017
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      The left heart appears to be whitish whereas the right one blackish, though they are the same stripes of black and white.pic.twitter.com/A781ceGtWO

      4 replies 7 retweets 26 likes
      Show this thread
    2. Mike Nicolella‏ @MikeNicolella 27 Nov 2017
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      Replying to @AkiyoshiKitaoka

      That's not true. The heart shape is made from white pixels in the left image and black pixels in the right

      1 reply 0 retweets 2 likes
    3. bmcnett‏ @bmcnett 27 Nov 2017
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      Replying to @MikeNicolella @AkiyoshiKitaoka

      in both images, the heart is made of alternating stripes of white and black. if you were to replace the background in both with purple, the hearts would appear to have the same lightness.

      1 reply 0 retweets 0 likes
    4. Mike Nicolella‏ @MikeNicolella 27 Nov 2017
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      Replying to @bmcnett @AkiyoshiKitaoka

      Are you saying replace the solid white/black stripes with purple stripes? If that exposes an illusion, great - show that. As it is, this isn't an illusion cuz the hearts actually are different.

      1 reply 0 retweets 1 like
    5. bmcnett‏ @bmcnett 27 Nov 2017
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      Replying to @MikeNicolella @AkiyoshiKitaoka

      both hearts are made of alternating black and white stripes, and as such are not different in overall luminance.

      1 reply 0 retweets 0 likes
    6. bmcnett‏ @bmcnett 27 Nov 2017
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      Replying to @bmcnett @MikeNicolella @AkiyoshiKitaoka

      the illusion is caused by the gray background around the hearts, which is darker on the left image and brighter on the right image.

      1 reply 0 retweets 0 likes
    7. Mike Nicolella‏ @MikeNicolella 27 Nov 2017
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      Replying to @bmcnett @AkiyoshiKitaoka

      The gray background is indeed lighter in the right image, but the actual meat of the heart is different, too - it's 255 white in the left, and 0 black on the right. I don't understand the illusion.

      2 replies 0 retweets 1 like
    8. bmcnett‏ @bmcnett 27 Nov 2017
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      Replying to @MikeNicolella @AkiyoshiKitaoka

      the meat of the heart is alternating 0/255 in one and 255/0 in the other.

      1 reply 0 retweets 0 likes
      Akiyoshi Kitaoka‏ @AkiyoshiKitaoka 27 Nov 2017
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      Replying to @bmcnett @MikeNicolella

      How about this?pic.twitter.com/NkuncUcpWL

      8:26 PM - 27 Nov 2017
      • 1 Like
      • bmcnett
      1 reply 0 retweets 1 like
        1. bmcnett‏ @bmcnett 27 Nov 2017
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          Replying to @AkiyoshiKitaoka @MikeNicolella

          same overall effect, but since hearts are white/black in both cases (there's no black/white) less room for misunderstanding

          0 replies 0 retweets 1 like
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