Preprocessing on the plate image is to increase character partition accuracy. 100 images in uncontrolled environment are considered to test the effectiveness of our method.

• 本论文采用100张未设限环境影像进行验证，将影像依其车牌亮度、影像复杂度、车牌拍摄距离、车牌拍摄角度、车牌倾斜角度及车牌周围色调等特性加以分类。