Shape-Time Photography
William T. Freeman and Hao Zhang
EECS Department
University of California, Berkeley
Technical Report No. UCB/CSD-02-1171
January 2002
http://www.eecs.berkeley.edu/Pubs/TechRpts/2002/CSD-02-1171.pdf
We introduce a new method to describe, in a single image, changes in shape over time. We acquire both range and image information with a stationary stereo camera. From the pictures taken, we display a composite image consisting of the image data from the surface closest to the camera at every pixel. This reveals the 3-d relationships over time by easy-to-interpret occlusion relationships in the composite image. We call the composite a shape-time photograph.
Small errors in depth measurements cause artifacts in the shape-time images. We correct most of these using a Markov network to estimate the most probable front surface, taking into account the depth measurements, their uncertainties, and layer continuity assumptions.
BibTeX citation:
@techreport{Freeman:CSD-02-1171,
Author = {Freeman, William T. and Zhang, Hao},
Title = {Shape-Time Photography},
Institution = {EECS Department, University of California, Berkeley},
Year = {2002},
Month = {Jan},
URL = {http://www.eecs.berkeley.edu/Pubs/TechRpts/2002/5657.html},
Number = {UCB/CSD-02-1171}
}
EndNote citation:
%0 Report %A Freeman, William T. %A Zhang, Hao %T Shape-Time Photography %I EECS Department, University of California, Berkeley %D 2002 %@ UCB/CSD-02-1171 %U http://www.eecs.berkeley.edu/Pubs/TechRpts/2002/5657.html %F Freeman:CSD-02-1171