最終更新日：2024/08/06
An optical illusion where ghostly grey blobs are perceived at the intersections of a light-coloured grid on a black background.
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Hermann grid
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An optical illusion where ghostly grey blobs are perceived at the intersections of a light-coloured grid on a black background.
Hermann grid
DiQt（ディクト）
無料
★★★★★★★★★★
