Method, system, medium and scanning device for preventing biological information leakage in document stamping clarity identification process

The invention discloses a method and a system for preventing biological information leakage in a document stamping clarity identification process, a medium and scanning equipment. The method comprises the following steps: 1) collecting a to-be-identified stamping image in a document; 2) the acquisition system processes the to-be-identified stamped image by using an anti-leakage means to obtain an anti-leakage stamped image; (3) foreground segmentation is carried out on the anti-leakage stamped image to obtain a stamped foreground image, (4) binarization processing is carried out on the stamped foreground image, and a stamped quality index used for evaluating stamped clarity and a stamped quality auxiliary judgment index are calculated; the system comprises a stamp acquisition device, an identification module and a display system. The medium stores a computer program for electronic data exchange; the scanning device comprises a shell, a camera module and an identification system. According to the method, the b