(9) Motion Perception

Motion perception deals with anything that would cause our eyes to see motion. There are two different kinds:

Stroboscopic movement – the brain perceives continuous movement in a rapid series of slightly varying images 

Phi phenomenon – an illusion of movement created when two adjacent stationary lights blink on and off in quick succession, and we perceive a single light moving back and forth between them

In this example, we have stroboscopic motion captured in a picture. This picturing technique is called "blur" and it captures what we would see if we viewed the world in slow motion. Because of the stroboscopic movement in our eyes, we would actually see this segment of pictures as the ones below (which are still a little bit blurry, but it's better than nothing).

If this was in real life, we would perceive this as the kid in the white shirt is moving from the left to the right in a continuous motion.