Seminars/Colloquia/Invited Talks

Seminars

Bill Freeman

The Coded Aperture Camera, and Other Cameras

PLACE:	Clark 110
EVENT:	CIS Seminar
DATE:	April 1, 2008
TIME:	1:00 - 2:00 PM

Abstract

The coded aperture camera is a conventional camera with a coded pattern of holes in the aperture. This gives a depth-dependent blur which we design to be easy to identify and to deblur, allowing us to estimate, from the captured image, both an all-focus image and (roughly) the depth everywhere. More generally, we analyze cameras as linear projections of the 4-d lightfield, write a prior over lightfields, and develop a Bayesian framework to study how well any given camera can recover the incident lightfield from its sensor data. This gives a common framework in which to compare the performance of ordinary lenses, stereo cameras, random cameras, lenticular arrays, pinhole cameras, coded aperture cameras, etc. Joint work with Anat Levin, Rob Fergus, Fredo Durand, Peter Sand, and Taeg Sang Cho.

Brief Biography:

Bill Freeman is a professor of Electrical Engineering and Computer Science at MIT. He does research in computer vision, computer graphics, and machine learning, studying how to represent, manipulate, and understand images. Before joining MIT, he worked for 9 years at Mitsubishi Electric Research Labs, for 6 years at the Polaroid Corporation, and for 1 year as a Foreign Expert at the Taiyuan University of Technology, Shanxi, China. Hobbies include flying cameras in kites.