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Comparison of correlation algorithms with correlating Shack-Hartmann wave-front images
Zhou, Hangcheng1,2,3; Zhang, Lanqiang1,2; Zhu, Lei1,2; Bao, Hua1,2; Guo, Youming1,2; Rao, Xuejun1,2; Zhong, Libo1,2; Rao, Changhui1,2
Source PublicationProceedings of SPIE: Real-Time Photonic Measurements, Data Management, and Processing II
Volume10026Pages:100261B
2016
Language英语
ISSN0277-786X
DOI10.1117/12.2247566
Indexed BySCI ; Ei
WOS IDWOS:000393153600027
SubtypeC
AbstractCorrelating Shack-Hartmann wavefront sensor is widely used in solar adaptive optics in which the relative shift between different subapertures by correlation algorithm is computed, and then the control voltage by wavefront reconstruction can be estimated to use for correcting the wavefront distortion induced by atmospheric turbulence. In this paper, several different correlation algorithms including Cross-Correlation Coefficient, Absolute Difference Function, Absolute Difference Function-Squared and Square Difference Function are used to estimate relative shift in correlating Shack-Hartmann wave-front sensor with the different observed solar structure such as sunspot, solar pore and solar granulation. The measurement noise RMS error is computed to compare the performance of the correlation algorithms. The results show the correlation algorithm precision is directly related to the solar structure. The measurement noise is relatively small with the relatively high contrast target, and vice versa. At the same time, the size of reference image also could influence the measurement noise, the larger size of the reference image, the smaller the measurement noise is. © 2016 SPIE.
KeywordAtmospheric Turbulence Functions Information Management Spurious Signal Noise Stress Intensity Factors Wavefronts
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Document Type期刊论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/8451
Collection自适应光学技术研究室(八室)
Affiliation1. Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, P.O. Box 350, Shuangliu, Chengdu, Sichuan
2.610209, China
3. Laboratory on Adaptive Optics, Institute of Optics and Electronics, Chinese Academy of Sciences, P.O. Box 350, Shuangliu, Chengdu, Sichuan
4.610209, China
5. University of Chinese, Academy of Sciences, No.19A Yuquan Road, Beijing
6.100049, China
Recommended Citation
GB/T 7714
Zhou, Hangcheng,Zhang, Lanqiang,Zhu, Lei,et al. Comparison of correlation algorithms with correlating Shack-Hartmann wave-front images[J]. Proceedings of SPIE: Real-Time Photonic Measurements, Data Management, and Processing II,2016,10026:100261B.
APA Zhou, Hangcheng.,Zhang, Lanqiang.,Zhu, Lei.,Bao, Hua.,Guo, Youming.,...&Rao, Changhui.(2016).Comparison of correlation algorithms with correlating Shack-Hartmann wave-front images.Proceedings of SPIE: Real-Time Photonic Measurements, Data Management, and Processing II,10026,100261B.
MLA Zhou, Hangcheng,et al."Comparison of correlation algorithms with correlating Shack-Hartmann wave-front images".Proceedings of SPIE: Real-Time Photonic Measurements, Data Management, and Processing II 10026(2016):100261B.
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