Chap 5 Flashcards

1
Q

Middle vision

A

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

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2
Q

How do you find edges?

A

Cells in primary visual cortex have small receptive fields

You know what I just go together because of the feature binding problem

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3
Q

Illusory contour

A

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

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4
Q

Gestalt grouping rules

A

A set of rules that describe when elements in an image will peer to group together

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5
Q

Gestalt rules of contour

A

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

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6
Q

Oliver selfridege(1959)

A

The pandemonium model letter recognition
The demon model that loosely represent neurons

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7
Q

Oliver selfridege(1959)

A

The pandemonium model letter recognition
The demon model that loosely represent neurons

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8
Q

Ambiguous figure

A

A visual stimulus, I guess rise to two or more interpretations of his identity of structure

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9
Q

Accidental viewpoint

A

A viewing position that produces some regularity in the visual image that is not presented in the world

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10
Q

Gaul figure ground assignment principles

A

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

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11
Q

Extreme edges

A

If edges of an object are shaded such that they seem to recede in the distance, they tend to be seen as a figure

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12
Q

Relative motion

A

If one region moves in front of another, then the closer region is figure

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13
Q

Relatability

A

The degrees to which two line segments appeared to be a part of the same contour

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14
Q

Global superiority effect

A

The properties of the whole object takes precedence over the properties of parts of the object

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15
Q

Non-accidental feature

A

A feature on an object that is not dependent on the exact or accent of view position of the observer

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16
Q

T junctions

A

Indicate occlusion top of T is in Front and the stem of the T is in the back

17
Q

Y Junction

A

Indicates corners facing the observer

18
Q

Naïve template theory

A

The proposal that the visual system recognizes objects by matching the neural representation of the image with a stored representation of the same shape in the brain( top down)

19
Q

Structural description

A

A description of an object, in terms of the nature of its constitutes parts, the responsibility between the parts

20
Q

Object, recognition process levels

A

Entry-level category: for an object, the label that comes to mine must come quickly when we identify the object

Subordinate level category - a more specific terms for an object

Superpositionate - a more general term for an object

21
Q

Prosopagnosia

A

An inability to recognize faces

22
Q

Agnosia

A

An inability to recognize objects despite being able to see them

23
Q

Double dissociation

A

When one particular function can be damaged without affecting the other thus object and face recognition must be processed by different systems at some level

24
Q

Extrasiate cortex

A

The region of the cortex bordering the primary visual cortex and controlling multiple areas involved in visual processing

25
Q

Where pathway

A

Is concerned with the location of shapes of objects, but not their names or functions

26
Q

What pathway?

A

Is concerned with the names and functions of an object, regardless of where they are