day22 - Psychology 2050 Perception Day 22 11 November 10...

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Psychology 2050 Perception Day 22 11 November 10
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2nd prelim: in class, 18 Nov it includes: lectures from days 13 - 23 review session: Wed 6:30 PM, 17 Nov, 202 Uris Hall the 2nd prelim from last year will not be posted
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Invariants, gradients,        mathematical group theory       cross-ratio    James Gibson,      Gunnar Johansson texture gradients     James Gibson   fractals     Benoit Mandelbrot noninteger dimensionality texture again, fourier analysis again
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invariants   vs. cues q. --> L.  quando 16th cent. theater James Gibson Gunnar Johansson George Berkeley Hermann von  Helmholtz
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sources of information invariant probability (property | info) = 1.00 cue probability (property | info) < 1.00  |  means “given” p(x | y) <-- from logic
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sources of information cue probability (fire | smoke ) < 1.00 probability (sun will rise tomorrow |  sun rose today) < 1.00
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sources of information invariant requires minimal knowledge,   an algorithm, and computation quite clean cue requires requires much knowledge  (co-occurrence matrices),  an algorithm, and computation quite messy
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invariants do not change after transformations translations and rotations luminance ratios in different light cues may well change
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Galilean group of 3 rotations and 3 translations from Day 8
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day22 - Psychology 2050 Perception Day 22 11 November 10...

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