Lecture 1: Introduction to Biological Vision - Vision Research ...

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Primary visual cortex• Basic properties–~200,000,000 neurons in one hemisphere ofmacaque–Large-scale• non-linear topographic map (cm)• (the first of several retinotopic cortical areas)– Fine-scale• hypercolumn organization (1 to 2 mm)Wednesday, August 29, 12
V1 large scale organization:RetinotopyA topographic mapping transforms retinal coordinates to V1cortical coordinates--a retinotopic map. “Log polar” in V1.PosteriorAnteriorFixate here.The contracting wave ofcontrast on your retinaproduces a traveling wave ofactivity in your V1,represented by theanimations on the right.FixationNow fixate here.And play the animation again.Rotating waves on yourretina produce approximatelytranslating waves of activityin your V1.Visual fieldV1(upside-down)Wednesday, August 29, 12
Page 5 and 6: Lecture 1• Overview of primate vi
Page 7 and 8: The computational problemLyxYour br
Page 9 and 10: Visual neural architectureComplex s
Page 12: Measurements of vision• Image mea
Page 17 and 18: Wednesday, August 29, 12Eyeball: re
Page 19 and 20: Eyeball & muscles• Form & functio
Page 21 and 22: Wednesday, August 29, 12Optics
Page 23 and 24: • Why aren’t the optics better?
Page 25 and 26: Overview of human/primate visualsys
Page 27 and 28: • Functions of the retina- discre
Page 31 and 32: Pathwaysout of the eye“Area 17”
Page 33 and 34: Pathways from eye tocortex• Retin
Page 37: Primary visual cortex (V1)Anterioro
Page 41 and 42: V1 small scale• Basic properties-
Page 43 and 44: V1 small scale• Basic properties-
Page 45 and 46: Contrast sensitivity of some V1neur
Page 47 and 48: Functions of localspatial filtering
Page 49 and 50: Functions of cortical local spatiot
Page 51 and 52: ming := 0.25` HRandomReal@D - 0.5`L
Page 53 and 54: Well-known problems with localedge
Page 57: Population coding and decodingCurre
Page 61: Primary visual cortex (V1)• Summa

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