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Proceedings Paper

Reconstruction of compressively sampled ray space by using DCT basis and statistically weighted L1 norm optimization
Author(s): Qiang Yao; Keita Takahashi; Toshiaki Fujii
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Paper Abstract

In recent years, ray space (or light field in other literatures) photography has gained a great popularity in the area of computer vision and image processing, and an efficient acquisition of a ray space is of great significance in the practical application. In order to handle the huge data problem in the acquisition process, in this paper, we propose a method of compressively sampling and reconstructing one ray space. In our method, one weighted matrix which reflects the amplitude structure of non-zero coefficients in 2D-DCT domain is designed and generated by using statistics from available data set. The weighted matrix is integrated in ι1 norm optimization to reconstruct the ray space, and we name this method as statistically-weighted ι1 norm optimization. Experimental result shows that the proposed method achieves better reconstruction result at both low (0.1 of original sampling rate) and high (0.5 of original sampling rate) subsampling rates. In addition, the reconstruction time is also reduced by 25% compared to the reconstruction time by plain ι1 norm optimization.

Paper Details

Date Published: 7 March 2014
PDF: 10 pages
Proc. SPIE 9020, Computational Imaging XII, 90200X (7 March 2014); doi: 10.1117/12.2042132
Show Author Affiliations
Qiang Yao, Nagoya Univ. (Japan)
Keita Takahashi, Nagoya Univ. (Japan)
Toshiaki Fujii, Nagoya Univ. (Japan)

Published in SPIE Proceedings Vol. 9020:
Computational Imaging XII
Charles A. Bouman; Ken D. Sauer, Editor(s)

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