Rendering compressed surface reflectance fields of 3D objects
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United States of America Patent
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Oct 12, 2004
Grant Date -
Jan 1, 2004
app pub date -
Jun 27, 2002
filing date -
Jun 17, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method models a three-dimensional object with a compressed surface reflectance field. Images of the object are acquired with multiple cameras for multiple viewpoints under different lighting conditions. The images are stored in a matrix M.sub.r representing a surface reflectance field for the three-dimensional object. The matrix M.sub.r is factorized into principle components pc.sub.k and coefficients cf.sub.k. The principal components pc.sub.k are stored in a matrix M.sub.pc. The matrix M.sub.pc is then factorized into principle components pc.sub.m and coefficients cf.sub.k which can be stored for each vertex V of a model of the three-dimensional object. The corresponding values of the principle components pc.sub.m, coefficients cf.sub.k, and coefficients cf.sub.k, respectively represent a compression of a surface map, which can be rendered from arbitrary viewpoints and under arbitrary lighting conditions.
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