William T. Freeman and Hao Zhang
EECS Department
University of California, Berkeley
Technical Report No. UCB/CSD-02-1171
January 2002
http://www2.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://www2.eecs.berkeley.edu/Pubs/TechRpts/2002/5657.html}, Number = {UCB/CSD-02-1171}, Abstract = {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. <p>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.} }
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://www2.eecs.berkeley.edu/Pubs/TechRpts/2002/5657.html %F Freeman:CSD-02-1171