Chap 5 Flashcards
Middle vision
involves the perception of address and surfaces
Determines which regions of an image should be grouped together into objects
Comes after basic features have been extracted from image and before object, recognition and seen understanding
How do you find edges?
Cells in primary visual cortex have small receptive fields
You know what I just go together because of the feature binding problem
Illusory contour
A contour that is perceived, even though nothing changes from one side of the contour to the other in the image
Communicate with each other to determine what an object is
Gestalt grouping rules
A set of rules that describe when elements in an image will peer to group together
Gestalt rules of contour
Good continuation: two elements will tend to group together if they lie in the same contour
Parallelism : parallel, contours make things similar
Common region : two features will group if they appear to be a part of the same larger region
Connectedness : two items will tend to group if they are connected
Commonfate : elements that moved in the same direction tend to group together
Synchronicity : elements that change at the same time to the group together
Oliver selfridege(1959)
The pandemonium model letter recognition
The demon model that loosely represent neurons
Oliver selfridege(1959)
The pandemonium model letter recognition
The demon model that loosely represent neurons
Ambiguous figure
A visual stimulus, I guess rise to two or more interpretations of his identity of structure
Accidental viewpoint
A viewing position that produces some regularity in the visual image that is not presented in the world
Gaul figure ground assignment principles
Surrounded- the surrounding region is likely to be grouped
Size - the smaller is likely to be figure
Symmetry - asymmetrical region tends to be seen as figure
Parallelism - regions with parallel contour to be seen as a figure
Extreme edges
If edges of an object are shaded such that they seem to recede in the distance, they tend to be seen as a figure
Relative motion
If one region moves in front of another, then the closer region is figure
Relatability
The degrees to which two line segments appeared to be a part of the same contour
Global superiority effect
The properties of the whole object takes precedence over the properties of parts of the object
Non-accidental feature
A feature on an object that is not dependent on the exact or accent of view position of the observer