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

More documents

Recommendations

Info

RetinayxReceptive field weights: W(x,y)Responsivity10.80.60.40.2-3 -2 -1-0.21 2 3-0.4xReceptive field weights: W(x)Wednesday, August 29, 12
• Functions of the retina– discrete image samplingRetina• Why aren't the receptors packed closer together? Physical wave guide limits?– automatic gain control• Retina codes contrast, not intensity– band-pass spatial filtering (“lateral inhibition”)• I.e. neither slow nor very rapid spatial changes in intensity are seen– economical coding (e.g. predictive coding)– front-end for edge detection– band-pass temporal filtering• I.e. neither slow nor very rapid temporal changes are seen– economical coding– front-end for motion measurement– color coding• (some animals have motion selective cells in retina, but not cats andprimates)• remove correlations from cone signals• front-end for color constancy mechanismsR L(x, y, t) L avgL avgW(x,y)R ~ W(x,y)*L(x,y)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: Overview of human/primate visualsys
Page 29 and 30: Overview of human/primate visualsys
Page 31 and 32: Pathwaysout of the eye“Area 17”
Page 33 and 34: Pathways from eye tocortex• Retin
Page 35 and 36: Overview of human/primate visualsys
Page 37 and 38: Primary visual cortex (V1)Anterioro
Page 39 and 40: V1 large scale organization:Retinot
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

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

Create successful ePaper yourself

Delete template?

Save as template?