FORM / SHAPE / SPATIAL VISION
- Multiple Channels Model (Spatial Frequency Theory) of form perception, properties of sinusoidal gratings: amplitude/contrast, spatial frequency, phase, orientation
- Contrast sensitivity functions (CSF)
- Experimental evidence of the existence of spatial frequency channels: adaptation experiments and the Campbell and Robson experiment
- Higher visual pathways, Magno vs Parvo, cortical area IT. What sort of stimuli are IT neurons sensitive to?
- Structuralist approach to form perception, analytic introspection
- Gestalt rules of figure/ground organization
- Gestalt grouping principles: proximity, similarity, good continuation, closure, common fate
- The Principle of Pragnanz (good form), a.k.a. the Minimum Principle, the principle of simplicity (these are all the same thing)
- Effects of Perceptual Set
- Feature Integration Thoery (FIT), visual search, feature primitives, attention, illusory conjunctions, serial versus parallel processing
- Effect of attention on response of visual cortical neurons
- Theories of Object Perception: View-Specific versus Recognition By Components (RBC)
COLOR PERCEPTION
- the visible spectrum
- What determines the perceived color of objects?
- reflectance / absorption spectra
- the three characteristics of color: hue, brightness, saturation
- the difference between subtractive and additive color mixture
- Newton's revised color circle
- nonspectral colors, complementary colors, primary colors
- Law of complementaries, Law of intermediates, Grassman's Law
- Trichromacy of color vision (Young-Helmholtz Theory)
- univariance principle, how is having 3 types of cone better than only 1 or 2?
- three cone types (differences in absorption, location, influence on perception)
- afterimages
- Opponent Process Theory (color opponency)
- chromatic and achromatic channels? R/G, B/Y, B/W
- double opponent cells in LGN
- how is color encoded by the visual system?
- types of color blindness, how are they different?
Updated August 15, 2004.