Explanation of the King Queen Jack Illusion

This is a visual trick video that demonstrates
the effectiveness of "cues to depth".
Three kinds of cues to depth are used:
1. Relative Retinal Image Size of Familiar Objects
   The farther away, the smaller the retinal image size is.
   Familiar objects provide relative size cues.

2. Occlusion (or T-junction)
   Partial occlusion of a far object by a near object
   creates T-shaped junctions of contours.

3. Relative Height in the Visual Field
   The farther on the ground an object is, the higher in the 
   visual field when you look down on the object.

Kazunori MORIKAWA
School of Human Sciences
Osaka University
E-mail: morikawa@hus.osaka-u.ac.jp