[1] [1] Zhou Qiang, Peng Junyi, Dai Shuling. Programmable GPU based real-time simulation of depth of field [J]. Journal of System Simulation, 2006, 18(8): 2219-2221.

[2] [2] P Pentland. A new sense for depth of field [J]. IEEE Trans Pattern Anal Mach Intell, 1987, 9(4): 523-531.

[3] [3] P Favaro, A Mennucci, S Soatto. Observing shape from defocused images [J]. International Journal of Computer Vision, 2003, 52(1): 25-43.

[4] [4] P Favaro, S Soatto. A geometric approach to shape from defocus [J]. IEEE Trans Pattern Anal Mach Intell, 2005, 27(3): 406-417.

[5] [5] P Favaro, S Soatto, M Burger, et al.. Shape from defocus via diffusion [J]. IEEE Trans Pattern Anal Mach Intell, 2008, 30(3): 518-531.

[6] [6] Tian Yanbing, Bai Jian, Huang Zhi. Depth estimation with a panoramic stereo imaging system [J]. Acta Optica Sinica, 2013, 33(6): 0611002.

[7] [7] C Tang, C P Hou, Z J Song. Defocus map estimation from a single image via spectrum contrast [J]. Opt Lett, 2013, 38(10): 1706-1708.

[8] [8] Xu Xiangyang, Chen Guangxue. Research of visual distance blur algorithm based on multi-scale overlay [J]. Acta Optica Sinica, 2014, 34(2): 0233002.

[9] [9] S Lee, G J Kim, S Choi. Real-time depth-of-field rendering using anisotropically filtered mipmap interpolation [J]. Visualization and Computer Graphics, IEEE Transactions on, 2009, 15(3): 453-464.

[10] [10] J Z Wu, C W Zheng, X H Hu, et al.. Rendering realistic spectral bokeh due to lens stops and aberrations [J]. Vis Comput, 2013, 29(1): 41-52.

[11] [11] Feng Xinxing, Zhang Liyan, Ye Nan, et al.. Fast algorithms on center location of two dismensional Gaussian distribution spot [J]. Acta Optica Sinica, 2012, 32(5): 0512002.

[12] [12] Li Xuyang, Li Yingcai, Ma Zhen, et al.. Orthoscopic, telephoto camera optical system design [J]. Acta Optica Sinica, 2010, 30(9): 2657-2661.

[13] [13] Xiao Jinshen, Feng Hui, Yi Benshun, et al.. Finite difference for semilinear parabolic differential inclusions method [J]. Journal of Wuhan University: Natural Science Edition, 2006, 52(3): 262-266.

[14] [14] Huang Zhiyin, Zhang Maojun, Zhang Xin, et al.. Multi-focus image fusion algorithm based on relative activity level [J]. Microcomputer Information, 2009, 25(6-3): 289-291.

[15] [15] Yang Huixian, Wang Xusi, Xie Penghe, et al.. Infrared image denoising based on improved threshold and inter-scale correlations of wavelet transform [J]. Acta Automatica Sinica, 2011, 37(10): 1167-1174.

[16] [16] Y Chai, H F Li, M Y Guo. Multifocus image fusion scheme based on features of multiscale products and PCNN in lifting stationary wavelet domain [J]. Opt Commun, 2011, 284(5): 1146-1158.