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Properties of M vs. P Neurons

Use of Isoluminant Stimuli Reveals Segregation of Functions across the M agnocellular vs. P arvocellular Systems. Properties of M vs. P Neurons. Isoluminant Stimulus Paradigm. Flicker Photometry Stimuli. Counter-Phase Red/Green Flicker. Increase Flicker Rate Until Color Fusion Threshold.

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Properties of M vs. P Neurons

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  1. Use of Isoluminant StimuliReveals Segregation of Functionsacross theMagnocellular vs. ParvocellularSystems

  2. Properties of M vs. P Neurons

  3. Isoluminant Stimulus Paradigm

  4. Flicker Photometry Stimuli

  5. Counter-Phase Red/Green Flicker

  6. Increase Flicker Rate Until Color Fusion Threshold Color fusion threshold usually around 12-15 Hz.

  7. Adjust Intensity of Green StimulusUntil Luminance Flicker Minimized The values of the Red and Green stimuli at the point of complete flicker fusion establishes the ISOLUMINANT POINT for the current observer.

  8. Contrast Sensitivity

  9. P-SystemResolvesManyLevels of Gray

  10. M-SystemResolvesFewLevels of Gray

  11. Depth/Size Scaling • Size Constancy • Ponzo Illusion • Muller-Lyer Illusion • Texture Gradients • Stereopsis • Motion Parallax

  12. Size Constancy

  13. Ponzo Illusion

  14. Müller-Lyer Illusion

  15. Green-on-Red Stimulus Format

  16. Depth/Distance from Texture Gradients

  17. Sony Wii Demo Depth from Motion Parallax

  18. Motion Analysis • Structure from Motion • Synchronized Apparent Motion(Grouping by Proximate Motion)

  19. Structure from Coherent Motion http://www.michaelbach.de/ot/col_equilu/index.html

  20. Grouping by Motion Frame-1 Frame-2

  21. Grouping by Motion

  22. Grouping by Motion

  23. Grouping by Motion

  24. Figure/Ground Segregation • Rubin’s Vase • Subjective Contours(Kaniza figures)

  25. Rubin’s Vase

  26. Subjective Contours

  27. Subjective Contours

  28. Object Perception • Binding Primitive Features intoObjects • Grouping by Colinearity(AI: “Block World”)

  29. Grouping by Colinearity(“Block World”)

  30. Appendix

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