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Psych 203 Foundations of Vision

Psych 203 Foundations of Vision. Professor Brian Wandell. http://www.stanford.edu/class/psych203. Lectures Tues and Thurs, 3:15-4:30 Building 260 Room 008. Seminar format. Lots of readings Lots of discussion and questions We will do some writing, presenting, and perhaps computing.

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Psych 203 Foundations of Vision

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  1. Psych 203Foundations of Vision Professor Brian Wandell http://www.stanford.edu/class/psych203 Lectures Tues and Thurs, 3:15-4:30 Building 260 Room 008

  2. Seminar format • Lots of readings • Lots of discussion and questions • We will do some writing, presenting, and perhaps computing

  3. Turning the Tables(R.N. Shepard)

  4. Fraser’s Spiral

  5. The Perception of Lightness

  6. Color Appearance Depends On The Spatial Pattern Across The Cone Mosaic(Shevell and Monnier)

  7. Craik-O’Brien-Cornsweet Effect

  8. Move Back and ForthThe Rings Appear to Rotate

  9. Human Vision What is the quality of the eye’s optics? Describe the receptor sampling mosaic? How do neurons in retina and visual cortex respond? How do we measure human pattern and temporal sensitivity?

  10. L,M Cones Stained, S-Cones Unstained

  11. Human Retina By The Numbers(Rodieck, 1998) • 5 x 5 cm, 0.4 mm thick • # cones: 5 x 106 • # rods: 108 • Cone width in fovea: 1 mu • Contacts per cone: 250 • 106 optic nerve fibers

  12. Color Science How do we measure signals used to create color? How do we quantify these color signals?

  13. Hunk of brain/Hubel/Ferrier

  14. Visual Areas: Human Visual area V1 V2 V3

  15. Development of visual cortex

  16. Perceptual Evaluation • Carefully controlled viewing environment • Calibrated display • Visual psychophysical judgments • Discrimination • Preference

  17. What’s Next? • Sign up for the class on Axess • Go to the class web-page and browse, • Start doing the readings • Start asking yourself questions for class discussion

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