An algorithm based on Wingner-Ville Distribution and Horizontal histogram was presented in skew angle correction of image. The proposed algorithm of special synchronous region smoothing was applied to image smoothing.

• 在图像二值化过程中采用全局阈值法 ；在图像偏斜纠正过程中给出了一种基于Wingner Ville分布和水平投影直方图的偏斜纠正算法 ；在图像平滑过程中采用特定的同步孔平滑算法 .