Demonstrations
Myron L. Braunstein
Rotating 'trapezoid'
quicktime movie (82,584 bytes) or
mpeg movie (61,640 bytes): Is it the difference in length of the vertical sides or the difference
in the enclosing angles that underlies the rotating trapezoid illusion?
(See Braunstein, 1971.)
Dihedral angle mpeg movie (634,385 bytes):
Does relative velocity determine perceived 3D orientation in a parallel
projection? (See Braunstein, Liter, & Tittle, 1993.)
Size constancy mpeg movie (343,810 bytes):
Can size constancy occur in parallel projections? (Do the small cylinders
appear to change size as they move from front to back?) (See Turner &
Braunstein, in press.)
Does conflicting occlusion inhibit your ability to fuse a stereogram?
One of these stereograms (which one depends on how you fuse them) has conflicting occlusion.
To see this demonstration you must be able to cross-fuse, unless you have an appropriate
stereo viewer handy. This is a static version of research using structure-from-motion. (See
Braunstein, Andersen, Rouse, & Tittle, 1986.)
stereogram 1
stereogram 2
Does enclosing part of a scene in a frame affect the perceived shapes of objects?
(See Eby & Braunstein, in press.)
scenes
