Thirdly, different judging criteria, including absolute distance, Euclidian distance and similarity matching, are adopted to match different requirements on recognition speed or accuracy.

• 最后在各级分类中采用了不同的判别准则 ；包括绝对值距离、欧氏距离及相似度准则 ；以适应于时间、准确性的不同要求 .