Backscroll Illusion

Kiyoshi Fujimoto

Kwansei Gakuin University, Japan
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Backscroll illusion is the apparent motion perceived in backgrounds of movie images that present locomotive objects such as people, animals and vehicles. In the attached movie, a human figure presents a walking gait against a counterphase grating. Although the grating has physical motion energies equally in the left and right directions, it appears to drift in a direction opposite to that of the gait.

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Backscroll illusion in far peripheral vision Kiyoshi Fujimoto & Akihiro Yagi Journal of Vision. 2007. 7(8):16, 1–7

Backscroll illusion: apparent motion in the background of locomotive objects Kiyoshi Fujimoto & Takao Sato Vision Research. 2006. 46:14-25

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