Extending position/phase-shift tuning to motion energy neurons improves velocity discrimination
Stanley Lam and Bertram Shi The Hong Kong University of Science & Technology Disparity Motion
Input Left

Poster : W63
Live Demo : 04Dec -- 8B

Decision Boundary
s ine wave grating -- velocity 2 1.8

Position





Fast
v eloc ity

1.6 1.4 1.2 1 0.8

Reichardt detector
Input Right Input Left Input

Slow

0.6 0.4 0.2 0

0

0.1

0.2

0.3 wx

0.4

0.5

0.6

s ine wave grating -- vertical 2 1.8

Phase


phase shifter phase shifter







1.6

Fast
v eloc ity

1.4 1.2 1 0.8

phase shifter

phase shifter

Motion energy
Input Right Input Left Input

Slow

0.6 0.4 0.2 0

0

0.1

0.2

0.3 wx

0.4

0.5

0.6

s ine wave grating -- position 2 1.8

Hybrid


phase shifter phase shifter







1.6

Fast
v eloc ity

1.4 1.2

phase shifter

phase shifter

1 0.8

Proposed model
Input Right Input

Slow

0.6 0.4 0.2 0

0

0.1

0.2

0.3 wx

0.4

0.5

0.6