Ms. Pengyan Li Profile

Pengyan Li

at Beijing Institute of Technology

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Proceedings Article | 5 August 2015 Paper

Linear Bregman algorithm implemented in parallel GPU

Pengyan Li, Jue Ke, Dong Sui, Ping Wei

Proceedings Volume 9622, 962216 (2015) https://doi.org/10.1117/12.2193282

KEYWORDS: Reconstruction algorithms, Compressed sensing, Computer architecture, Radon, Lithium, Matrix multiplication, Computer programming, Parallel computing, Information technology, Visualization

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At present, most compressed sensing (CS) algorithms have poor converging speed, thus are difficult to run on PC. To deal with this issue, we use a parallel GPU, to implement a broadly used compressed sensing algorithm, the Linear Bregman algorithm. Linear iterative Bregman algorithm is a reconstruction algorithm proposed by Osher and Cai. Compared with other CS reconstruction algorithms, the linear Bregman algorithm only involves the vector and matrix multiplication and thresholding operation, and is simpler and more efficient for programming. We use C as a development language and adopt CUDA (Compute Unified Device Architecture) as parallel computing architectures. In this paper, we compared the parallel Bregman algorithm with traditional CPU realized Bregaman algorithm. In addition, we also compared the parallel Bregman algorithm with other CS reconstruction algorithms, such as OMP and TwIST algorithms. Compared with these two algorithms, the result of this paper shows that, the parallel Bregman algorithm needs shorter time, and thus is more convenient for real-time object reconstruction, which is important to people’s fast growing demand to information technology.

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