采用二值化的夹角余弦距离法进行分类。主要从以下两个步骤进行实现：a、将样本库中每个样本进行二值化，去阈值T=0.05；b、利用夹角余弦距离法对待测样品X进行分类。-Binarization Angle cosine distance method is used to classify.Implementation is mainly　the following two steps: a, each samples in the sample library binarization, to the threshold T = 0.05 B, included Angle cosine distance method is used to treat the sample X are classified.