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题名:
Redundancy computation analysis and implementation of phase diversity based on GPU
作者: Zhang, Quan1,2,3,4; Bao, Hua1,3; Rao, Changhui1,3; Peng, Zhenming2
刊名: OPTICAL REVIEW
出版日期: 2015-10-01
卷号: 22, 期号:5, 页码:741-752
关键词: Phase diversity ; Adaptive optics ; Wavefront sensing ; Image restoration ; Parallel computing
DOI: 10.1007/s10043-015-0120-7
文章类型: Article
英文摘要: Phase diversity method is not only used as an image restoration technique, but also as a wavefront sensor. However, its computations have been perceived as being too burdensome to achieve its real-time applications on a desktop computer platform. In this paper, the implementation of the phase diversity algorithm based on graphic processing unit (GPU) is presented. The redundancy computations for the pupil function, point spread function, and optical transfer function are analyzed. Two kinds of implementation methods based on GPU are compared: one is the general method which is accomplished by GPU library CUFFT without precision loss (method-1) and the other one performed by our own custom FFT with little damage of precision considering the redundant calculations (method-2). The results show the cost and gradient functions can be speeded up by method-2 in contrast with the method-1 and the overhead of global memory access by kernel fusion can be reduced. For the image of 256 x 256 with the sampling factor of 3, the results reveal that method-2 achieves speedup of 1.83x compared with method-1 when the central 128 x 128 pixels of the point spread function are used.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Optics
研究领域[WOS]: Optics
关键词[WOS]: IMAGE-RESTORATION ; PROPAGATION ; TRANSFORM ; SPECKLE
收录类别: SCI
语种: 英语
WOS记录号: WOS:000362491100010
ISSN号: 1340-6000
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/3714
Appears in Collections:光电技术研究所被WoS收录文章_期刊论文

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作者单位: 1.Chinese Acad Sci, Key Lab Adapt Opt, Chengdu 610209, Peoples R China
2.Univ Elect Sci & Technol China, Sch Optoelect Informat, Chengdu 610054, Peoples R China
3.Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100039, Peoples R China

Recommended Citation:
Zhang, Quan,Bao, Hua,Rao, Changhui,et al. Redundancy computation analysis and implementation of phase diversity based on GPU[J]. OPTICAL REVIEW,2015,22(5):741-752.
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