Auto-focusing algorithm based on cross correlation

[1] Sun Y, Duthaler S, J Nelson B. Auto-focusing in computer microscopy:selecting the optimal focus algorithm[J]. Microscopy Research and Technique, 2004, 65:139~149 [2] 孙明磊,宗光华,余志伟,等.基于图像分析的显微视觉自动聚焦系统 . 北京亚洲成人在线一二三四五六区学报, 2005,31(2) :192~196 Sun Minglei, Zong Guanghua, Yu Zhiwei, %et al%. Automatic focusing system of micro to vision based on image analysis[J]. Journal of Beijing University of Aeronautics and Astronautics, 2005,31(2):192~196(in Chinese) [3] 祝世平,房建成,周 锐,一种新的能量谱-熵图像聚焦评价函数[J].北京亚洲成人在线一二三四五六区学报, 1999,25(6):720~723 Zhu Shiping, Fang Jiancheng, Zhou Rui. New kind of energy-spectrum entropy image focusing evaluation function[J]. Journal of Beijing University of Aeronautics and Astronautics, 1999, 25(6):720~723(in Chinese) [4] 任四刚,李见为,谢利利.基于灰度差分法的自动聚焦技术[J].光电工程,2003, 30(2):53~55 Ren Sigang, Li Jianwei, Xie Lili. Automatic focusing technique based on gray scale difference method[J]. Opto to Electronic Engineering,2003 ,30 (2) :53~55(in Chinese) [5] 谢 攀,张 利,康宗明,等. 一种基于尺度变化的DCT自动聚焦算法[J]. 清华大学学报(自然科学版),2003,43(1):55~58 Xie Pan, Zhang Li, Kang Zongming, %et al%. Window scale-based automatic focus algorithm using DCT transformation[J]. J Tsinghua Univ(Sci & Tech), 2003, 43(1):55~58(in Chinese) [6] Chen Guojin, Zhang Kesong, Gong Ye. Research on image definition function using in real time auto-focusing system . In:Zhang Guangjun, Zhao Huijie, Wang Zhongyu. Fifth International Symposium on Instrumentation and Control Technology . Beijing, 2003 [7] Hughlett E, Cooper K. A video based alignment system for X-ray lithography . SPIE Sympos on Microlithography . Beijing,1991