Rotation Generated by Translation
This illusion concerns apparent rotation generated by pure translation. Square patterns consisting of four segments appear to rotate when they move straightly at a constant speed across the grid background. More surprisingly, the rotations in opposite directions can be generated by exactly the same square patterns. This illusion might be explained by the well-known inchworm illusion which arises at the four segments one after another resulting in the impression of rotation. This illusion is new in the sense that the rotation is generated by pure translation.
This illusion won 1st prize at the 2013 Best Illusion of the Year Contest. It was created by Jun Ono, Akiyasu Tomoeda and Kokichi Sugihara.
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