Figure 2.

Akiyoshi Kitaoka's rotating snake illusions (the left 2 panels). In the case of the single-ring version, most people perceive a counter-clock wise motion. In the case of the four-ring version, people perceive clockwise or counter-clockwise motion depending on color alignment. Negative controls (non-illusions) for which people perceive no motion are presented in the right 2 panels. The resolution of all images is width 160 and height 120 pixels. For prediction, the same consecutive 20 images were input to the trained networks. To experience stronger illusory motion perception, please refer to “Akiyoshi's illusion pages,” http://www.ritsumei.ac.jp/~akitaoka/index-e.html.