Especially, the authors propose a method for extracting a seal imprint by using its color information, and puts foward a method for the detection and recovery of missing pattern.

• 阐述了印章识别系统的预处理过程,包括图像的去噪、去背景、二值化、边缘提取等几个部分,其中的去背景部分采用了利用颜色信息提取印章的方法,并对其因污染而残缺的部分进行了修复。