[3] Lee S H. Optical implementations of digital algorithms for pattern recognition. Opt. Engng., 1986, 25(1):69~75
[4] Freeman M O, Saleh B E A. Optical location of centroids of non-overlapping objects. App. Opt., 1987, 26(14/15):2752~2759
[5] Huh H, Pan J K. Optical/digital invariant recognition of two-dimensional patterns with straight lines. Opt. Engng., 1996, 35(4):997~1002
[6] Week Jr. A R. Fundamentals of electronic image processing. Bellingham(Washington USA): SPIE Optical Engineering Press, 1996. 316~332
[9] Chang S, Song Z, Jin C et al.. Adaptive clipped model and its optical implementation. Optik, 1998, 107(4):135~140