Lectures Tues and Thurs, 3:15-4:30 Building 260 Room 008 Psych 203 Foundations of Vision http://www.stanford.edu/class/psych203 Professor Brian Wandell
Dec 31, 2015
LecturesTues and Thurs, 3:15-4:30Building 260 Room 008
Psych 203Foundations of Vision
http://www.stanford.edu/class/psych203
Professor Brian Wandell
• Lots of readings
• Lots of discussion and questions
• We will do some writing, presenting, and
perhaps computing
Seminar format
Turning the Tables(R.N. Shepard)
Fraser’s Spiral
The Perception of Lightness
Color Appearance Depends On The Spatial Pattern Across The Cone
Mosaic(Shevell and Monnier)
Craik-O’Brien-Cornsweet Effect
Move Back and
ForthThe Rings Appear to
Rotate
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?
L,M Cones Stained, S-Cones Unstained
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
Color Science
How do we measure signals used to create color?How do we quantify these color signals?
Hunk of brain/Hubel/Ferrier
V1V2V3
Visual area
Visual Areas: Human
Development of visual cortex
Perceptual Evaluation
• Carefully controlled viewing environment• Calibrated display• Visual psychophysical judgments
DiscriminationPreference
What’s Next?
1. Sign up for the class on Axess
2. Go to the class web-page and browse,
3. Start doing the readings
4. Start asking yourself questions for class discussion