Motion Flashcards
What are the 6 functions of motion perception?
- Determines the motion of an object
- Attract attention
- Figure-background segmentation
- Estimate depth
- Infer 3D structure
- Infer action
What is ego motion?
Induced by motion of observer
What is object motion?
Movement of objects
What is apparent motion?
When stationary objects appear to move
What is biological motion?
Motion of living things
What is motion parallax?
The depth from motion
What is motion after effect?
When stationary objects appear to be moving after prolonged exposure of movement
What are the components of motion?
Movement and direction
What does motion after-effect imply?
That vision involves:
- Opponent processing
- Interocular transfer (transfer of info from both eyes to V1)
What is optic flow?
- flow field induced by motion on the retina
- differ when the person moves and object moves
How is motion related to orientation?
Motion is orientation in time
What are the 2 problems faced when detecting motion?
Correspondence - Which features in frame 2 correspond to frame 1
Aperture - Direction of local figure might be ambiguous depending on apperture
What is saccadic suppression?
The reduction of visual sensitivity that occurs when one makes a saccadic eye movement
- One copy of signal goes to eye muscles
- Other copy goes to ‘comparator’ which compensates for image changed caused by eye movement
What is akinetopsia?
Individual has no perception of motion
