夏克-哈特曼波前探测器的距离-幂指数加权质心探测算法
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摘要
对于暗弱目标探测,现有的方法仍然存在探测误差较大的问题,为了提高夏克-哈特曼波前探测器的质心探测精度,提出了一种改进的距离-幂指数质心探测算法。在不同情况下将所提算法与现有的几种质心算法进行对比,仿真结果表明,在不同信噪比、不同光斑直径、子区域不同像素等因素影响下,所提算法的质心探测误差低于其他算法的误差,且更为稳定。
For the weak target detection,the existing methods still have the problem of large detection error.In order to improve the accuracy of the centroid detection of the Shack-Hartmann wavefront sensor,an improved distance-power index centroid detection algorithm is proposed.The proposed algorithm is compared with several existing centroid algorithms under different conditions,the simulation results show that the centroid detection error of proposed algorithm is lower and more stable than that of other algorithms under the factors of different signal-tonoise ratios,different spot diameters and different pixels in sub-area.
For the weak target detection,the existing methods still have the problem of large detection error.In order to improve the accuracy of the centroid detection of the Shack-Hartmann wavefront sensor,an improved distance-power index centroid detection algorithm is proposed.The proposed algorithm is compared with several existing centroid algorithms under different conditions,the simulation results show that the centroid detection error of proposed algorithm is lower and more stable than that of other algorithms under the factors of different signal-tonoise ratios,different spot diameters and different pixels in sub-area.
引文
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[2]Chen B,Yang J,Li X Y,et al.Comparison of two close-loop control methods in adaptive optics with wavefront curvature sensing[J].Acta Optica Sinica,2016,36(3):0301003.陈波,杨靖,李新阳,等.波前曲率传感自适应光学两种闭环控制方法的对比[J].光学学报,2016,36(3):0301003.
[3]Xu Y,Man T L,Wan Y H.Research progress on adaptive wide-field microscopic imaging technology with high resolution[J].Laser&Optoelectronics Progress,2017,54(9):090003.徐洋,满天龙,万玉红.自适应宽场高分辨率显微成像技术的研究进展[J].激光与光电子学进展,2017,54(9):090003.
[4]Li M X.Research on algorithms of Hartmann wavefront sensing operated with faint object[D].Beijing:University of Chinese Academy of Sciences,2016.李明星.弱信号哈特曼波前探测算法的研究[D].北京:中国科学院大学,2016.
[5]Xuan L,Li D Y,Liu Y G.Prospect of liquid crystal adaptive optics in astronomy application[J].Chinese Journal of Liquid Crystals and Displays,2015,30(1):1-9.宣丽,李大禹,刘永刚.液晶自适应光学在天文学研究中的应用展望[J].液晶与显示,2015,30(1):1-9.
[6]Poyneer L A.Correlation wave-front sensing algorithms for Shack-Hartmann-based adaptive optics using a point source[R/OL].Livermore:Lawrence Livermore National Laboratory,2003.https://e-reports-ext.llnl.gov/pdf/242712.pdf.
[7]Arines J,Ares J.Minimum variance centroid thresholding[J].Optics Letters,2002,27(7):497-499.
[8]Liu D,Yu J.Otsu method and K-means[C].International Conference on Hybrid Intelligent Systems,2009:344-349.
[9]Bradley C,Hubin N,Lardière O,et al.Performance comparison of centroiding algorithms for laser guide star wavefront sensing with extremely large telescopes[J].Applied Optics,2010,49(31):G78-G94.
[10]Nicolle M,Fusco T,Rousset G,et al.Improvement of Shack-Hartmann wave-front sensor measurement for extreme adaptive optics[J].Optics Letters,2004,29(23):2743-2745.
[11]Wang C C,Hu L F,Xu H Y,et al.Wavefront detection method of a single-sensor based adaptive optics system[J].Optics Express,2015,23(16):21403-21413.
[12]Baik S,Park S,Kim C,et al.A center detection algorithm for Shack-Hartmann wavefront sensor[J].Optics&Laser Technology,2007,39(2):262-267.
[13]Yan B,Wang B,Li Y.Optimal ellipse fitting method based on least-square principle[J].Journal of Beijing University of Aeronautics and Astronautics,2008,34(3):295-298.闫蓓,王斌,李媛.基于最小二乘法的椭圆拟合改进算法[J].北京航空航天大学学报,2008,34(3):295-298.
[14]Zhang T,Qi Y Q.MATLAB image processing programming and application[M].Beijing:Mechanical Industry Press,2014:139-150.张涛,齐永奇.MATLAB图像处理编程与应用[M].北京:机械工业出版社,2014:139-150.
[15]Xia M L.The development of high precision Hartmann wavefront detector for eye aberration[D].Beijing:University of Chinese Academy of Sciences,2011.夏明亮.高精度人眼像差哈特曼探测器的研制[D].北京:中国科学院大学,2011.