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Perception overview - Peter

Perception overview - Peter. Peter covered: Approaches to perception Binocular vision (corresponding retinal points, RDSs, rivalry, the matching problem, vertical disparity)

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Perception overview - Peter

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  1. Perception overview - Peter • Peter covered: • Approaches to perception • Binocular vision (corresponding retinal points, RDSs, rivalry, the matching problem, vertical disparity) • Channels and receptive fields (V1 cell types - cortical simple, complex, endstopped cells; serial and parallel processing - starting with X and Y cells) • Organisation of V1 (columns, hypercolumns (eye dominance, orientation) and cortical magnification • Perceptual implications of V1 “channels”(TAE, lateral inhibition, paradigms for studying channels, IOT of TAEs) • Spatial Frequency channels(Contrast , CSF, octaves, Fourier analysis + synthesis; SF illusions and aftereffects)

  2. Perception overview - Peter • Peter continued: • Extrastriate cortex(physiological and psychophysical evidence for the parallel processing of colour, motion, form and depth) • Motion perception (real and apparent motion, the aperture problem, intrinsic/extrinsic terminators, plaids, long and short range apparent motion) • Effects of experience(effects of restricted input during development, human infant visual capacities, why is the brain plastic in development?; how psychophysics can estimate the duration of the human critical period)

  3. Perception overview - Darren • Colour Perception(What is colour?,trichromatic theory, lightness constancy, Land’s Retinex theory (colour constancy), neurophysiology of colour and opponent processes - from retina to V4, lightness perception complications) • Object recognition(Scene segmentation, Template matching, the Pandemonium model, Marr’s theory, Biederman’s recognition by components, neurophysiology of IT, Faces) • Interactions(A functional approach, Examples from previous lectures, An example from motion perception, An example from perceptual grouping, An example from colour perception)

  4. Exam: Multiple choice 20 from PW, 10 from DB • Stay calm • Don’t immediately select the most obvious alternative • Faced with a question you don’t know the answer to - use what knowledge you do have to try to work out what the answer is (the answer is literally right in front of you, after all!). • (e) “all of the above” is not always correct • Examples at: http://vision.psy.mq.edu.au/~peterw/multchoice.html

  5. Exam: Short essays1 from PW, 1 from DB • Read the question • Read the question again • Answer the question • Try to demonstrate your understanding of the issue being asked about. • The highest marks go to those who obviously get it, and who can fully explain it. • Examples at: • http://vision.psy.mq.edu.au/~peterw/psy237questions.html

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