Binarization is one important step in automatic digital fingerprint identification.Selection of threshold will greatly influence the effect of binarization,as well as the number of valid features.

• 二值化是数字指纹自动识别中不可或缺的重要环节,阈值的每一个像素的变化都会影响二值化处理效果,并且会直接影响到特征数量的保持度。