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21 Cards in this Set
- Front
- Back
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Middle Vision
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-The stage in visual processing responsible for combining features into objects (groups)
-After extraction of basic features -Before object recognition |
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Illusory contours
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Edges perceived despite lack of physical evidence for them
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Structuralism
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Perceptions are simply the sums of sensations, can understand complex objects by analyzing their components.
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Gestalt Theory
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The perceptual whole is greater than the sum of its sensory parts.
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Texture segmentation
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-carving an image into regiions of common texture properties
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Gestalt grouping principles (8)
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- similarity
- proximity - common fate - good continuation - common region - connectedness - closure (things that are not convex) - deep concavities |
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Ambiguous figures
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generates two or more plausible interpretations (Necker Cube)
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Accidental viewpoint
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produces regularity in image that is not present in the real world
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Figure-ground segregation
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process of determining which feature belongs to foreground and background
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What becomes a figure?
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- convex regions
- smaller region - moving region - symmetric/parallel region - nearer region |
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relatability
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degree to which two line segements appear to be part of the same contour
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nonaccidental features
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not dependent on accidental viewpoint or observer
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Global superiority effect
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Properties of whole object take precedence over properties of parts of the object
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Grand organizing principles:
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1. Pragnaz (Gestalt): driven to experience things as simple as possible
1. Likelihood (Helmholtzean principle): organization chosen to correspond to most likely distal layout, context |
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Template theory
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Lock and key, match template (problem is you would need an infinite number of templates)
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Structural description
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In terms of natures of constituent parts and relationships between those parts
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"recognition by components" model/ geon theory
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-recognized by identities and relationships of component parts
-items built out of geometric ions |
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Prosopagnosia
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Ability to recognize objects as a face and recognize specific faces are distinct
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Grandmother Cell
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-any cell that seems to be selectively responsible to one specific object
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Extrastriated Cortex:
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-borders primary visual cortext
-involved in middle vision tasks |
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Visual information moves out along two paths:
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1. pariental lobe (where)
2. temporal lobe (what) |
