Simple synthetic sequences for feature detection.
Adapted from code by Ivan Laptev.
INPUTS
siz - video will be siz x siz x siz
type - switch
1 - corner moving up down
2 - two circles meet each other
3 - a circle moving against the wall
4 - spatio-temporal oscilations with increasing frequence
EXAMPLE
f = synthetic_stsequence( 25, 1 ); playmovie( f, 0 );