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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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    Akiyoshi Kitaoka‏ @AkiyoshiKitaoka 27 Feb 2017
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    2色法によるイチゴの錯視。この画像はすべてシアン色(青緑色)の画素でできているが、イチゴは赤く見える。 Strawberries appear to be reddish, though the pixels are not.pic.twitter.com/Ginyhf61F7

    5:07 PM - 27 Feb 2017
    • 4,644 Retweets
    • 9,393 Likes
    • Bridget Brown-Burkett mirakel in cell no. 7 ashton MildredLarralde Mari_arts_chan そら Master(妖怪あかしゃぐますてる) Sator Otanvisky 👑🌈 せーは(跡地)
    132 replies 4,644 retweets 9,393 likes
      1. New conversation
      2. Akiyoshi Kitaoka‏ @AkiyoshiKitaoka 4 Nov 2017
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        珍しく、いいね!を頂きました。

        1 reply 0 retweets 5 likes
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      3. Akiyoshi Kitaoka‏ @AkiyoshiKitaoka 28 Apr 2018
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        久々にいいね。

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      4. End of conversation
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      2. Akiyoshi Kitaoka‏ @AkiyoshiKitaoka 28 Dec 2019
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        「イチゴの色の錯視の画素にはRの信号が含まれており、それが見えているのであって、錯視ではない」と主張する人がいらっしゃいまして、等色や混色についての基礎知識を持って頂いてから議論したいと思うのですが、この絵ならどうでしょうか。グレースケール画像です。R入ってます。赤く見えますか?pic.twitter.com/fpIjDDYWYn

        1 reply 2 retweets 11 likes
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      3. Akiyoshi Kitaoka‏ @AkiyoshiKitaoka 28 Dec 2019
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        Gも入っています。緑のイチゴに見えますか? Bも入っています。青のイチゴに見えますか? Rが入っていないと(すべての画素のRの値がゼロ)ですと、イチゴの色の錯視は成立しません。ですから、それは必要です。しかし、それだけでは十分ではない、ということなのです。

        1 reply 1 retweet 3 likes
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      2. Jiro Sakanaka‏ @Jiro_ 1 Mar 2017
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        Replying to @AkiyoshiKitaoka

        . @AkiyoshiKitaoka @tumemoto 既にコメントにもたくさん書かれていますが、半分くらいの明るさまで赤が入っています。赤を全部なくすと2枚めの画像。pic.twitter.com/EBLaspQmcW

        3 replies 151 retweets 86 likes
      3. Akiyoshi Kitaoka‏ @AkiyoshiKitaoka 13 Mar 2017
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        Replying to @Jiro_ @tumemoto

        グレースケールの画像でもRGB値で言えばRはゼロということはありません(全画素でRゼロならGもBもゼロだから真っ黒画像)。この場合、「この画像には赤い画素は含まれていない」と表現したら、「いや、赤が入っている」とおっしゃるのでしょうか。pic.twitter.com/pBhuMsY6yf

        2 replies 13 retweets 13 likes
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      1. Akiyoshi Kitaoka‏ @AkiyoshiKitaoka 22 Feb 2018
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        二色法についても時間ができたら本腰を入れて取り組みたい。 Strawberries appear to be reddish, though all the pixels are cyan or gray. http://www.psy.ritsumei.ac.jp/~akitaoka/cake01-D8E_7804L-G255B255-65X.jpg …pic.twitter.com/hwVTfLwk4z

        2 replies 6 retweets 21 likes
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      2. Chihiro‏ @fathom500 27 Feb 2017
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        Replying to @AkiyoshiKitaoka

        赤くみえました。これはいちごをみたことがない人(いちごが赤い色をしていると知らない人)にも赤くみえるのでしょうか?

        1 reply 20 retweets 9 likes
      3. Akiyoshi Kitaoka‏ @AkiyoshiKitaoka 27 Feb 2017
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        Replying to @fathom500

        この旗の色が赤く見えるなら、見たことないものでも赤く見えるということかもしれません。pic.twitter.com/0YumLaYZct

        1 reply 253 retweets 160 likes
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      1. Akiyoshi Kitaoka‏ @AkiyoshiKitaoka 12 Mar 2017
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        Replying to @UniQuETVx

        Please examine the original image. http://www.psy.ritsumei.ac.jp/~akitaoka/ichigo-IMG_20160227_220021ps-twocolor-C20p.jpg …

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