2Poon J C H, Ghadia M, Mao G M T, et al. Arobust vision system for vehicle license plate recognition using gray-scale morphology [ A ]. In: Proc of the IEEE International Symposium on Industrial Electronics [ C ]. Athens, 1995. 394-399.
3Parisi R, Cludio E D D, Lucarelli G, et al. Car plate recognition by neural networks and image processing[ A]. In: Proc of the 1998 IEEE International Symposium on Circuits and Systems[C]. Monterey, 1998. 195- 198.
4Yu M, Kim Y D. An approach to Korean license plate recognition based on vertical edge matching [ A ]. In:Proc of the 2000 IEEE International Conference on Systems, Man, and Cybernetics [ C ]. Tennessee, 2000.2975 - 2980.