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Department自适应光学技术研究室(八室)
Improvement of correlation-based centroiding methods for point source Shack-Hartmann wavefront sensor
Li, Xuxu1,2; Li, Xinyang1; wang, Caixia1
Source PublicationOPTICS COMMUNICATIONS
Volume411Pages:187-194
2018-05-15
Language英语
ISSN0030-4018
DOI10.1016/j.optcom.2017.11.059
Indexed BySCI ; Ei
WOS IDWOS:000418646600031
EI Accession Number20175004525912
SubtypeJ
AbstractThis paper proposes an efficient approach to decrease the computational costs of correlation-based centroiding methods used for point source Shack-Hartmann wavefront sensors. Four typical similarity functions have been compared, i.e. the absolute difference function (ADF), ADF square (ADF(2)), square difference function (SDF), and cross-correlation function (CCF) using the Gaussian spot model. By combining them with fast search algorithms, such as three-step search (TSS), two-dimensional logarithmic search (TDL), cross search (CS), and orthogonal search (OS), computational costs can be reduced drastically without affecting the accuracy of centroid detection. Specifically, OS reduces calculation consumption by 90%. A comprehensive simulation indicates that CCF exhibits a better performance than other functions under various light-level conditions. Besides, the effectiveness of fast search algorithms has been verified. (C) 2017 Elsevier B.V. All rights reserved.
KeywordShack-Hartmann wavefront sensor Centroiding methods Correlation methods Point source Fast search algorithms
EI KeywordsFunctions ; Learning algorithms ; Wavefronts
EI Classification Number921 Mathematics ; 922.2 Mathematical Statistics
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/9333
Collection自适应光学技术研究室(八室)
Affiliation1.The Key Laboratory on Adaptive Optics, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu; 610209, China;
2.University of Chinese Academy of Sciences, Beijing; 100039, China
Recommended Citation
GB/T 7714
Li, Xuxu,Li, Xinyang,wang, Caixia. Improvement of correlation-based centroiding methods for point source Shack-Hartmann wavefront sensor[J]. OPTICS COMMUNICATIONS,2018,411:187-194.
APA Li, Xuxu,Li, Xinyang,&wang, Caixia.(2018).Improvement of correlation-based centroiding methods for point source Shack-Hartmann wavefront sensor.OPTICS COMMUNICATIONS,411,187-194.
MLA Li, Xuxu,et al."Improvement of correlation-based centroiding methods for point source Shack-Hartmann wavefront sensor".OPTICS COMMUNICATIONS 411(2018):187-194.
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