[1] Zhai Yongping, Zhou Dongxiang, Liu Yunhui, et al. Design of evaluation index for auto-focusing function and optimal function selection[J]. Acta Optica Sinica, 2011, 31(4): 0418002.
[4] Liu Xingbao, Yuan Daocheng. Research on image definition criterion using wavelet transform based on the texture analysis[J]. Chinese Journal of Scientific Instrument, 2007, 28(8): 1508-1513.
[5] Jarvis R A. Focus optimization criteria for computer image-processing[J]. Microscope, 1976, 24(2): 163-180.
[6] Brenner J F, Dew B S, Horton J B, et al. An automated microscope for cytologic research: A preliminary evaluation[J]. Journal of Histochemistry and Cytochemistry, 1976, 24(1): 100-111.
[7] Tenenbaum J M. Accommodation in computer vision[D]. Stanford: Stanford University, 1970.
[8] Subbarao M, Choi T, Nikzad A. Focusing techniques[J]. Optical Engineering, 1993, 32(11): 2824-2836.
[9] Nayar S K, Nakagawa Y. Shape from focus[J]. IEEE Transactions on Pattern Analysis and Machine Intelligence, 1994, 16(8): 824-831.
[10] Jiang Zhiguo, Han Dongbing, Yuan Tianyun, et al. Study on auto focusing algorithm for automatic microscope[J]. Journal of Image and Graphics, 2004, 9(4): 396-401.
[12] Li Yufeng, Chen Niannian, Zhang Jiacheng. Fast and high sensitivity focusing evaluation function[J]. Application Research of Computers, 2010, 27(4): 1534-1536.
[13] Jiang Ting, Tan Yuegang, Liu Quan. Research of a clarity-evaluation function of image based on Sobel[J]. Computer and Digital Engineering, 2008, 36(8): 129-131.
[16] Lin Zhaohua, Mi Yang, Ge Bing. Algorithm of rapid auto-focus combing rough and fine adjustment[J]. Foreign Electronic Measurement Technology, 2015, 34(10): 28-31.