Perceptual Systems - First Year Interest Group Seminar - Assignment 3 | N 1, Assignments of Health sciences

Download Perceptual Systems - First Year Interest Group Seminar - Assignment 3 | N 1 and more Assignments Health sciences in PDF only on Docsity! Perceptual Systems Assignment 3 Due Thursday, April 2, 2009 1. (4 pts) The diameter of a foveal cone photoreceptor is approximately 2.5 microns. A peripheral cone is approximately 10 microns. What is a micron? What is the visual angle covered by an individual foveal cone? What is the visual angle covered by an individual peripheral cone. 2. (6 pts) Consider a series of adjacent gray strips of paper with the following reflectance values: 0.1, 0.3, 0.4, 0.5, 0.8, 0.5, 0.4, 0.3, and 0.1 (a) Suppose that the strips are uniformly illuminated with a light that this 150 photons/sec on each strip. What would be the intensity in photons/sec coming off the strips? (b) Sketch the intensity distribution of the light reflected from the strips: c) Sketch the approximate response distribution from the ganglion cells produced by this intensity distribution: Spatial position R es po ns e (s pi ke s/ se c) Spatial position In te ns ity (p ho to ns /s ec )