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2005 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR'05) - Volume 1
Dense Photometric Stereo Using Tensorial Belief Propagation
San Diego, California
June 20-June 26
ISBN: 0-7695-2372-2
Kam-Lun Tang, Hong Kong University of Science and Technology
Chi-Keung Tang, Hong Kong University of Science and Technology
Tien-Tsin Wong, Chinese University of Hong Kong
We address the normal reconstruction problem by photometric stereo using a uniform and dense set of photometric images captured at fixed viewpoint. Our method is robust to spurious noises caused by highlight and shadows and non-Lambertian reflections. To simultaneously recover normal orientations and preserve discontinuities, we model the dense photometric stereo problem into two coupled Markov Random Fields (MRFs): a smooth field for normal orientations, and a spatial line process for normal orientation discontinuities. We propose a very fast tensorial belief propagation method to approximate the maximum a posteriori (MAP) solution of the Markov network. Our tensor-based message passing scheme not only improves the normal orientation estimation from one of discrete to continuous, but also reduces storage and running time drastically. A convenient handheld device was built to collect a scattered set of photometric samples, from which a dense and uniform set on the lighting direction sphere is obtained. We present very encouraging results on a wide range of difficult objects to show the efficacy of our approach.
Citation:
Kam-Lun Tang, Chi-Keung Tang, Tien-Tsin Wong, "Dense Photometric Stereo Using Tensorial Belief Propagation," cvpr, vol. 1, pp.132-139, 2005 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR'05) - Volume 1, 2005
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