Journal of Atmospheric and Environmental Optics, Volume. 9, Issue 3, 237(2014)
Numerical Simulation of Adaptive Optical Imaging on GPUs
In the adaptive optics(AO) system, imaging is a very important process. The imaging process of the detectors and Hartman-Shack wavefront sensor in the AO simulation system is calculated with two-dimensional discrete convolution, whose numerical algorithm can be implemented with fast Fourier transformation (FFT). With the increase of the matrix size, the computation of convolution increases dramatically, and becomes a bottleneck of the AO system. To solve the problem, convolution on graphic processing unit(GPU) was implemented, which is a powerful accelerator in modern high performance computers. By applying various optimizations, significant performance improvement is obtained. On the NVIDIA Tesla C2050 GPU, a speedup of 5 to 24 times compared to serial program on the CPU with different image sizes is achieved.
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WU Zhen-hua, TANG Qiu-yan, WANG Zhong-jie, MA Wen-jing, LONG Guo-ping, LI Yu-cheng. Numerical Simulation of Adaptive Optical Imaging on GPUs[J]. Journal of Atmospheric and Environmental Optics, 2014, 9(3): 237
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Received: Oct. 29, 2013
Accepted: --
Published Online: Jun. 3, 2014
The Author Email: Zhen-hua WU (wuzhenhua10@gmail.com)