US 2004/0001059 A1Published application

Rendering compressed surface reflectance fields of 3D objects

AssigneeMitsubishi Electric Research Laboratories, Inc.

InventorsHanspeter Pfister, Wojciech Matusik

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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 Mr representing a surface reflectance field for the three-dimensional object. The matrix Mr is factorized into principle components pck and coefficients cfk. The principal components pck are stored in a matrix Mpc. The matrix Mpc is then factorized into principle components pcm and coefficients cfk which can be stored for each vertex V of a model of the three-dimensional object. The corresponding values of the principle components pcm, coefficients cfk, and coefficients cfk, respectively represent a compression of a surface map, which can be rendered from arbitrary viewpoints and under arbitrary lighting conditions.

Claims6

Dependent claims

A method for modeling a three-dimensional object, comprising:

acquiring, with a plurality of cameras, for each of a plurality of viewpoints, a plurality of sets of images of the object, each of the plurality of sets of images for each viewpoint having different lighting;
storing the plurality of images as a matrix Mr representing a surface reflectance field for the three-dimensional object;
factorizing the matrix Mr into principle components pck and coefficients cfk;
storing the principal components pck in a matrix Mpc;
factorizing the matrix Mpc into principle components pcm and coefficients cfk;
and
storing for each vertex V of a model of the three-dimensional object the corresponding values of principle components pcm, coefficients cfk, and coefficients cfk, respectively representing a compression of a surface map,, a view map, and a light map in combination representing a compressed surface reflectance field at the vertex V.

4 more elements

Dependencies are inferred from the claim text.