Motion perception

When motion vision three components interact:

Movement illusions and illusory movements

When we sit in a moving express train and the scenery flies by, then we know that there is an apparent movement of the landscape. If you are sitting in a stationary train, however, and on the adjacent track to set a train in motion, you can often differ not immediately whether you will be moving yourself or just a moving Nachbarzug perceives (see vection ).

A simple apparent motion, the so-called " thumb jump", you can demonstrate to yourself. If you hold your thumb close to his nose and alternately close the left and the right eye, the thumb appears to jump back and forth. A very important role in the cultural life has gotten the phenomenon of apparent motion through the film: There are images in rapid succession ( 24 in the second) presented, which then appear to move.

Comparable with afterimages are the Bewegungsnachbilder. This perception deception arises when one looks for about 30 seconds in a river flowing past or into a waterfall and then to solid body. This now seems to liquefy.

Movement patterns

On the study of motion vision since Helmholtz, the development of appropriate patterns of movement has played a central role. Traditionally, this light bundles were deflected by means of movable mirror and used oscilloscopes. Today, experimental movement patterns are created mainly as an apparent movement with computers, although it is known that the human eye up to 300 images per second reacts differently to apparent motion and continuous movements. Known movement patterns are Juleszmuster, summations of Gaussischer blob or dot patterns (eg biological motion).