[1] [1] Xia Renbo, Liu Weijun, Zhao Jibin, et al.. Fully automatic camera calibration method based on circular markers[J]. Chinese Journal of Scientific Instrument, 2009, 30(2): 368-373.

[2] [2] Wu Fanlu, Liu Jianjun, Ren Xin, et al.. Deep space exploration panoramic camera calibration technique based on circular makers[J]. Acta Optica Sinica, 2013, 33(11): 1115002.

[3] [3] Xia Ruixue, Lu Rongsheng, Liu Ning, et al.. A method of automatic extracting feature point coordinates based on circle array target[J]. China Mechanical Engineering, 2010, 21(16): 1906-1910.

[4] [4] Chen Xinyu, Ma Zi, Hu Ying, et al.. A new method for accurate location of concentric circles in visual measurement[J]. Journal of Optoelectronics · Laser, 2013, 24(8): 1524-1528.

[5] [5] Jiang G, Quan L. Detection of concentric circles for camera calibration[C]. ICCV 2005. Tenth IEEE International Conference on. 2005. IEEE, 2005, 1: 333-340.

[6] [6] Ying X H, Zha H B. An efficient method for the detection of projected concentric circles[C]. IEEE International Conference on Image Processing, 2007.

[7] [7] Heikkila J. Geometric camera calibration using circular control points[J]. Pattern Analysis and Machine Intelligence, IEEE Transactions on, 2000, 22(10): 1066-1077.

[8] [8] Liu Quan, Su Hang. Camera calibration based on correction of asymmetric circle center projection[J]. Optics and Precision Engineering, 2009, 17(12): 3103.

[9] [9] Chen X, Zhao Y. A linear approach for determining camera intrinsic parameters using tangent circles[J]. Multimedia Tools and Applications, 2014: 1-15.

[10] [10] Zhao Z, Wei Z, Zhang G. Estimation of projected circle centers from array circles and its application in camera calibration[C]. Second Asia-Pacific Conf on Computational Intelligence and Industrial Application. 2009: 182-185.

[11] [11] Hu Peicheng, Li Ning, Zhou Jianjiang. Improved camera self- calibration method based on circular points[J]. Opto-Electronic Engineering, 2007, 34(12): 54-60.

[12] [12] Wu Fuchao. Mathematical Methods in Computer Vision[M]. Beijing: Science Press, 2008.

[13] [13] Gonzalez R C, R E Woods. Digital Image Processing[M]. Beijing: Electronic Industry Press, 2002.

[14] [14] Fitzgibbon A, Pilu M, Fisher R B. Direct least square fitting of ellipses[J]. Pattern Analysis and Machine Intelligence, IEEE Transactions on, 1999, 21(5): 476-480.