The Worm’s Eye View Illusion

2018 Third prize
Michael Pickard and Gurpreet Singh : “The Worm’s Eye View Illusion ”. UK

In this four frame movie the sense of motion is very real. What is surprising is that the direction of motion can be made to reverse simply by changing color. This change of direction occurs because the viewer automatically sees the most prominent of the two colors as foreground (i.e. the subject) and the less prominent color as background. As the slider changes the relative brightness of the two colors changes one way or another, whichever color stands out as the foreground determines the direction of motion. The Worm’s Eye View illusion is based on a color-matching technique described by Profs. Stuart Anstis and Patrick Cavanagh, who developed it as a screening test for color blindness.

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