[5] Jarvis R A. Focus optimization criteria for computer image processing[J]. Microscope, 1976, 24(2): 163-180.
[6] Tenenbaum J M. Accommodation in Computer Vision[D]. USA: Stanford University,1970.
[7] ZHANG X, Fukuda N, Obuchi Y, et al. A signal processing system on chip for digital cameras[C]//IECON 2000.26th Annual Conference of the IEEE, 2000: 1243-1248.