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30 Cards in this Set

  • Front
  • Back
Dorsal Pathway
Important in processing info about where items are located and how they might be acted on..guiding actions such as grasping
Ventral Pathway
Temporal lobes.
Processes info that leads to recognition and identification of objects.
Visual Field
Portion of the wolrd that is visible at the present moment
A part of the retina that can collect detailed information.
Bottom-Up Processing
Taking info from the world and building upon it.
Top-Down Processing
Taking info that we already have and using it to interpret what you experience. driven by goals
Taking in information about the world and making sense of it.
pick up colour
3 types of cones:
1. blusih light
2. greenish light
3. yellowish-green light (perception to red)
Grouping Principles
Guide the visual system and produce our perception of what goes with what
Things that are closer together are more likely to be grouped together
Uniform Connectedness
Linked or vertical organisation---colums. overrides proximity.
Things are grouped together based on how similar they are (such as colour, shape, etc.)
Closure or Line Termination
Group things together in columns
The Binding Problem
How do we associate different features (colour, shape, orientation, etc.) so that we perceive one object?
-one system analyses colour, another movement, etc.
Spatial Location
Can serve as the glue to the bingind problem. if shape, colour, motion all occupy the same space, then it seems reasonable that they would be bound together
The process of matching representations of organised sensory input to stored representations in memory.
People who have no sensory defecit (can hear, see, taste, etc.) but cannot readily recognise objects around them.
Models of Recognition: VIEWPOINT DEPENDENCE
objects look different from different angles
Models of Recognition: EXEMPLAR VARIATION
There are many different instances of a category (number of different shaped/size chairs)
Template Matching Model
Match the whole image to a stored representaion of the whole object. (A template is a pattern that can be used to compare indiv. items to a standard)
Feature Matching Model
Extract important or discriminating features from the image and match these with known features of objects.
RBC (Recognition-By-Components) Model
Represents the 3-D structure of objects by specifying their parts and the spatial relation among the parts.
The 1st stage of visual analysis?
Detect edges and colours
Part of the RBC model. There are 24 (ex: cones, cylinders, etc.). they are 3-D geometrical shapes that can be used to represent any object. They are viewpoint independent.
The inability to recognise different faces.
Interpreting Information: CONTEXT
Information is interpreted relative to the context
Word Superiority
The context of surrounding letters can manipulate the perception of a target letter.
Brightness Constancy
Our ability to see objects as continuing to have the same brightness even though light may change their immediate properties.
Size Constancy
Our perceptions of the size of objects are relatively constant
Edge Detection
The process of identifying and locating sharp discontinuites in an image