slides on vision. blue / yellow bipolar cell green / red bipolar cell + − + − +−−+ −/+...

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Slides on Vision

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Page 1: Slides on Vision. Blue / Yellow Bipolar Cell Green / Red Bipolar Cell + − + − +−−+ −/+ Opponent – Process Theory Blue Green Red Yellow

Slides on Vision

Page 2: Slides on Vision. Blue / Yellow Bipolar Cell Green / Red Bipolar Cell + − + − +−−+ −/+ Opponent – Process Theory Blue Green Red Yellow

Blue / YellowBipolar Cell

Green / RedBipolar Cell+− +−

+− − + −/+Opponent – Process

Theory

Blue Green Red Yellow

Page 3: Slides on Vision. Blue / Yellow Bipolar Cell Green / Red Bipolar Cell + − + − +−−+ −/+ Opponent – Process Theory Blue Green Red Yellow

+-

On center

off surround

Center-Surround Cells

+- -

G

+-

Mild excitation

Mild inhibition

Maximal excitation

Maximal inhibition

Minimal effect

+-

+-

+-

+-

Page 4: Slides on Vision. Blue / Yellow Bipolar Cell Green / Red Bipolar Cell + − + − +−−+ −/+ Opponent – Process Theory Blue Green Red Yellow

Darker

Lighter

Mach Bands &The Hermann Grid

Page 5: Slides on Vision. Blue / Yellow Bipolar Cell Green / Red Bipolar Cell + − + − +−−+ −/+ Opponent – Process Theory Blue Green Red Yellow

+-A

+-B

+-C

+-D

B is more inhibited than A and will appear darker

C is less inhibited

than D and will appear lighter

Explaining Mach Bands

Page 6: Slides on Vision. Blue / Yellow Bipolar Cell Green / Red Bipolar Cell + − + − +−−+ −/+ Opponent – Process Theory Blue Green Red Yellow

Small foveal

receptive fields

Largeperipheralreceptive

fields

More light falls on inhibitory surroundwhich leads to seeing a dark spot

+---

-+ --

Explaining The Hermann Grid