Motion Perception is the process of inferring the speed the speed and direction of elements in a scene based on visual, vestibular and proprioceptive inputs. We perceive motion when there are changes in spatial distribution of light, and over time it can lead to motion perception. We see this when watching a person jog. The movement can be individual or unified.
We perceive a few different types of movement.
Real: The light physically moves.
Apparent: Lights flash one after the other with close to 40-200 milliseconds in between. The movement is perceived from one light to the other.
Induced: Light is surrounded by a larger object that is moved. The light appears to move in opposite directions.
Auto-kinetic: Light that is seen in a completely dark environment. The light can be perceived in any direction.
Movement after-effect: Light appears to be moving in opposite directions.
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