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How We See Terrence Sejnowski HHMI Salk Institute University of - PowerPoint PPT Presentation

Nov 02, 2023 •259 likes •482 views

How We See Terrence Sejnowski HHMI Salk Institute University of California, San Diego Levels of Investigation Simple Cells in Visual Cortex Hubel and Wiesel (1962) DeAngelis, Ohzawa and Freeman (1995) Goal of Vision "Regarding the

  1. How We See Terrence Sejnowski HHMI Salk Institute University of California, San Diego

  2. Levels of Investigation

  4. Simple Cells in Visual Cortex Hubel and Wiesel (1962) DeAngelis, Ohzawa and Freeman (1995)

  6. Goal of Vision "Regarding the central goal of vision as scene recovery makes sense. If we are able to create, using vision, an accurate representation of the three-dimensional world and its properties, then using this information we can perform any visual task" Aloimonos and Rosenfeld (1991)

  9. Complexity of the Visual World

  10. The Unexpected Visitor 1. Free viewing, 2. Estimate the material circumstances of the family, 3. Give the ages of the people

  11. Attention Modulates Firing Rate “Not attended” 80 0 0 500 1000 1500 2000 2500 3000 350 70 60 Firing Rate (Hz) “Attended” 50 40 30 20 10 0 0 500 1000 1500 2000 2500 3000 350 Time (ms) Desimone, 2001

  12. Decisions, Decisions

  13. Reward Modulates Visual Responses Glimcher, 2002

  14. DOPAMINE

  15. Dopamine Pathways

  16. Wolfram Schultz (and friend)

  17. Temporal Differences Revealed Schultz, Dayan, Montague, 1997

  18. Tesauro, 1994 TD Gammon

  19. Tesauro, 1994 TD Gammon

  21. Hammer and Menzel, 1997 VUMmx1 - Octopamine

  22. Peter Dayan Read Montague Gerald Tesauro Kenji Doya

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