There appear to be an orange spiral and a red-purple one, though they are both gray (R220, G220, B220).pic.twitter.com/e1wfkbpfV4
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この棒で引っ張って示す画素のRGBの検出とグレーであることの証明(解説)がとても分かりやすいです
私も真似してみたいのですが先生のご使用されてるソフトじゃないとできないですか?
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