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04 - Features, forms, and visual objects


Topics addressed in the lecture:

  • Gestalt principles of perceptual organization
  • Representation of complex patterns in the ventral visual pathway
  • Feature selectivity
  • Position invariance and complex-cell encoding
  • Contour and object border encoding
  • Figure-ground segregation
  • Perception vs. sensation 

Examples for question you should be able to answer:

  • Neurons in different visual areas along the ventral pathway are selective for increasingly complex visual patterns. For which property of a visual stimulus do the neurons in higher visual areas of the ventral pathway become less selective?
  • Explain how the Gestalt principle of “good continuation” could be supported by contextual modulation of receptive fields in primary visual cortex? 

Important concepts:

  • Perceptual grouping
  • Contour integration 
  • Border ownership
  • Surface enhancement
  • Binding-by-synchronization
  • Perceptual bi-stability 
  • Visual awareness

Topics addressed in the lecture:

  • Stimulus-Sensation-Perception
  • Structure of eye and retina
  • Processing principles related to the structure of the retina
  • Cone and rod photoreceptor types 
  • Encoding of spatial information
  • Encoding of color information

Examples for questions you should be able to answer:

  • What is hierarchical coding?
  • What is retinotopy?

Important concepts:

  • Labeled-line coding
  • Hierarchical vs. parallel vs. horizontal processing
  • Receptive field
  • Retinotopy
  • Local coding
  • Coarse coding


Last update of this page: Jan 16, 2018