等比的なら距離に対してスクリーン上の位置は指数関数的な位置になるはずだけど、実際の透視投影は距離に対してスクリーン上の位置は反比例関数になるから…と理解すればいいのかな?https://twitter.com/AkiyoshiKitaoka/status/1207940771925524481 …
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I am an experimental psychologist who studies visual illusions as well as makes illusion artworks. #illusion #opticalillusion #perception #錯視
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Taichi AOKI Retweeted Akiyoshi Kitaoka
等比的なら距離に対してスクリーン上の位置は指数関数的な位置になるはずだけど、実際の透視投影は距離に対してスクリーン上の位置は反比例関数になるから…と理解すればいいのかな?https://twitter.com/AkiyoshiKitaoka/status/1207940771925524481 …
Taichi AOKI added,
反比例的です。近似としては、反比例関数が近いです。反比例関数よりは、減少の仕方が緩やかですが。pic.twitter.com/IGbr6sAFjL
そうか、視覚としては、球面状のスクリーンに投影するのと同等だから、角度でとらえるのですね! 目の前の平面状のスクリーンに投影したときの、スクリーン上の位置で考えていました。
おっしゃる通りで、知覚心理学や神経生理学では、網膜に映る像の大きさは、視角(visual angle)として記述します。
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