Motion Perception

Mind Map by , created almost 6 years ago

Degree Psychology (Perception) Mind Map on Motion Perception, created by natalieclark29 on 12/06/2013.

Created by natalieclark29 almost 6 years ago
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Motion Perception
1 Uses
1.1 motion of objects in the world.
1.2 Attracts attention
1.3 Figure-background segmentation
1.4 Estimate depth (motion parallax)
1.5 Infer form and 3D structure
1.6 Infer action and type of actor from biological motion
2 Types of Motion
2.1 Ego motion
2.2 Object motion
2.3 Apparent motion
2.4 Biological motion
2.5 Motion parallax
3 Components of Motion
3.1 Direction
3.2 Speed
3.3 Velocity
4 Computation of Visual Motion
4.1 Motion aftereffect
4.1.1 implies an opponent-process system, like that of colour vision
4.1.2 Interocular transfer Result of activities of neurons in a part of the visual system where information collected from two eyes is combined Input from both eyes is combined in area V1 Recent studies: Locate site of motion aftereffects more precisely
4.2 Aperture
4.2.1 Correspondance problem
4.2.2 Aperture problem
5 Optic Flow
6 Models for Motion Detection
6.1 Spatiotemporal energy models for the perception of motion
6.2 Elaborated Reichardt detectors
6.3 Model of human visual-motion sensing
7 Eye Movement
7.1 Smooth pursuit
7.2 Saccade
7.3 problem of discriminating motion across the retina that is due to eye movements vs. object movements
7.3.1 Motor system solves “problem” of why an object in motion may appear stationary by sending out two copies of each order to move eyes One copy goes to eye muscles Another (“efference copy”) goes to an area of visual system that has been dubbed “comparator” Comparator can then compensate for image changed caused by eye movement, inhibiting any attempts by other parts of the visual system to interpret changes as object motion
8 Akinetopsia
8.1 caused by disruptions to the human cortical homolog of MT

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