Three-dimensional perception of planar line segments.
Two-dimensional line drawings can be perceived as three-dimensional images if they are viewed through a grating of parallel lines placed a short distance above the drawing. The position in space of the images is a function of the angle between the lines in the drawing and those in the viewer grating.
D003201:Computers; D003867:Depth Perception; D004292:Dominance, Cerebral; D005556:Form Perception; D006801:Humans; D007088:Illusions; D009903:Optical Illusions