# lec6 - Announcements Assignment 1 Posted to the web page...

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1 CS252A, Fall 2010 Computer Vision I Cameras and Radiometry Computer Vision I CSE 252A Lecture 6 CS252A, Fall 2010 Computer Vision I Announcements Assignment 1 Posted to the web page: Due Thursday, 10/21/10 Additional TA office hour - To be announced Read Chapter 4 of Forsyth & Ponce Textbook warning: Last year, some students have used an online version of the text. I believe that it’s a draft version and it doesn’t include chapters 2 & 3 CS252A, Fall 2010 Computer Vision I Last lecture in a nutshell CS252A, Fall 2010 Computer Vision I Thin Lens: Image of Point O F P P’ Z’ f Z CS252A, Fall 2010 Computer Vision I Deviations from the lens model Deviations from this ideal are aberrations Two types 2. chromatic 1. geometrical spherical aberration astigmatism distortion coma Aberrations are reduced by combining lenses, coatings Compound lenses CS252A, Fall 2010 Computer Vision I Spherical aberration Rays parallel to the axis do not converge Outer portions of the lens yield smaller focal lengths

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2 CS252A, Fall 2010 Computer Vision I Radiometry Read Chapter 4 of Ponce & Forsyth Solid Angle • Irradiance • Radiance • BRDF Lambertian/Phong BRDF CS252A, Fall 2010 Computer Vision I Solid Angle By analogy with angle (in radians), the solid angle subtended by a region at a point is the area projected on a unit sphere centered at that point The solid angle subtended by a patch area dA is given by Power is energy per unit time Radiance: Power traveling at some point in a specified direction, per unit area perpendicular to the direction
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• Winter '08
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• Charge-coupled device, Solid angle, Ponce •

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