A New Approach to Preprocessing of Image for Auto-identification of Seal Imprint

The auto-identification of Seal imprint is one of the important applications in the field of image processing and pattern recognition,and that,the result of auto-identification depends on the preprocessing of seal imprint image.In the paper,every phase of the preprocessing including binary-image,removing the white edge,recognizing the shape,getting the frame of the seal imprint,computing the rotated angle,is discussed and studied carefully,and a corresponding series of algorithms is presented.At the same time,the complex backgrounds in seal imprint are considered fully.By the method with the character of high processing speed,it's easy for the seal imprint to be identified latter and improve the correct probability of the seal imprint auto-identification.