01:830:301 Lecture 16: Sensation and Perception 3/20/22/29
Document Summary
Side placement of eyes - no binocular. Stereopsis: perception of relative depth based on the 2 retinal images. Retinal disparity - provides information about relative depth. A small relative depth between two objects = smaller retinal disparity. A large relative depth between two objects = larger retinal disparity. Zero retinal disparity is achieved when the two objects are side by side, no relative depth between object a and object b. Horopter = all points at the same perceived depth as fixation (susan (left) and harry (right) lie on the horopter that is defined as ralph (straight)), all points that have. Zero disparity with respect to the point of fixation, in this case, All points on the horopter fall on corresponding points, points not on horopter - images falls on non-corresponding points. Points farther than fixation have uncrossed disparity. Points closer than fixation have crossed disparity. Evolutionary advantage: helps segment objects from background.
