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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. Eiji_Watanabe‏ @eijwat 9 May 2019
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      富士山~ってゆーか、電柱がめっちゃ曲がっとるpic.twitter.com/ByA3Xx9aFO

      4 replies 1 retweet 11 likes
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    2. Eiji_Watanabe‏ @eijwat 10 May 2019
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      あれ?よくよく考えたらなんで曲がってるんだ?

      5 replies 0 retweets 3 likes
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    3. Telematic‏ @telematic 13 May 2019
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      Replying to @eijwat

      極めて定性的にいうと、レンズから遠いものは歪まない、電柱の上端はレンズから遠いので本来の垂直に近い、というのでどうでしょう。

      1 reply 0 retweets 1 like
    4. Eiji_Watanabe‏ @eijwat 13 May 2019
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      Replying to @telematic

      @sina_lana @stnk20 @AkiyoshiKitaoka @HirokiMori レンズが引き起こす歪だとすると、静止しているものを撮影してもおなじことが起こる??混乱してきた

      1 reply 0 retweets 0 likes
    5. Telematic‏ @telematic 13 May 2019
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      Replying to @eijwat @sina_lana and

      受光素子全面が瞬間に感光すれば垂直に映る。電柱の上端から下端まで順次下向きにスキャンして露光するために斜めになる。上端は下端よりレンズから遠いために、見かけの移動速度が小さいために、上端は垂直に近く、下端は寝た角度になるのでカーブする。これで如何?

      1 reply 0 retweets 1 like
    6. Satoshi Tanaka‏ @stnk20 13 May 2019
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      Replying to @telematic @eijwat and

      静止してたら傾きも曲がりもしないです(理想的なレンズなら) みなさん上端が遠いといいますが、それは曲がる理由にならないはず (画像左右で電柱までの距離が変わるとき、見かけの速さも変わるので曲がる)というのが正確かと思います 定式化もそんなに難しくないです

      1 reply 0 retweets 1 like
    7. Lana Sinapayen‏ @sina_lana 13 May 2019
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      Replying to @stnk20 @telematic and

      上端が遠い=速さが変わる、ということです。 Angular speed is the same, so things further away from the lens move faster.

      2 replies 0 retweets 1 like
    8. Lana Sinapayen‏ @sina_lana 13 May 2019
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      Replying to @sina_lana @stnk20 and

      (つまり、「速さが変わる」というところが一緒ですが、電柱の速さが全体的に変わるのではなくて、遠いところがもっと早く動くせいで曲がるという仮説です)

      2 replies 0 retweets 1 like
      Akiyoshi Kitaoka‏ @AkiyoshiKitaoka 14 May 2019
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      Replying to @sina_lana @stnk20 and

      遠いところが遅く動いて見えるのではないでしょうか。

      3:42 PM - 14 May 2019
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      • Lana Sinapayen Eiji_Watanabe Telematic
      1 reply 0 retweets 3 likes
        1. Eiji_Watanabe‏ @eijwat 14 May 2019
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          Replying to @AkiyoshiKitaoka @sina_lana and

          曲がっている電柱をよくみると、上のほうが「ブレ」が少ない。また、電柱に巻かれいる部品が、上のほうが湾曲している(下から見上げたようにみえる)。つまり、電柱の上のほうが「遠い」のは間違いなさそう。

          0 replies 0 retweets 2 likes
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