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Chapter 4: Object Recognition. Object/Pattern Recognition: Making sense of stimulus energy Process: Bottom-Up vs. Top-down – see ambiguous image Direct vs. Constructive Perception. Gestalt Organizational Principles. Theories of Pattern Recognition

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chapter 4 object recognition

Chapter 4: Object Recognition

Object/Pattern Recognition: Making sense of stimulus energy

Process: Bottom-Up vs. Top-down – see ambiguous image

Direct vs. Constructive Perception

gestalt organizational principles
Gestalt Organizational Principles

Theories of Pattern Recognition

Gestalt: Stimulus information combined with innate organizing principles of sensory systems. Need examples of principles (proximity, similarity, common fate, closure, and overriding principle of Pragnanz

theories of pattern recognition cont
Theories of Pattern Recognition: Cont.
  • 2. Template Matching: external pattern matched to stored internal representation
  • 3. Feature Analysis: constructing pattern based on combinations of primitive features
  • 4. Prototype Matching: Stored representation that acts of ‘exemplar’ of entire category of patterns.
  • 5. Geon Theory: Recognition based on geometric primitives
template matching
Template matching
  • But what about K K K K K K
prototype matching
Prototype matching
  • Central tendency: average representation
  • Attribute frequency: modal representation
expertise and pattern recognition
Expertise and Pattern Recognition
  • Chase and Simon (1970’s): studies with chess experts
  • Expertise corresponds to more efficient processing of increasingly larger, more meaningful patterns.
  • Expansion of working memory capacity – Long-term working memory