And put forward a quartic location method, it considers the variety of actual vehicle image, and takes different operations on different image, achieving the goal of drawing the VLP.

• 实验中使用一种四次车牌定位法，该方法充分考虑实际拍摄汽车图象的多样性，对每种图象进行有针对性的处理，达到提取车牌的目的。