特征识别包括指纹特征提取、指纹特征三角形编码和指纹特征三角形比对三个过程。
The fingerprint character recognition includes three processes, which are the character extraction, the character triangle coding and the character triangle matching.
比对过程中首先根据两个集合中的全等三角形求出它们的旋转和平移参数，然后对根据参数进行转换后的特征集合进行点模式匹配。
In the matching process the parameters of rotation and displacement were obtained by two congruent triangles, then the point-pairs matching would be performed on the transformed sets.
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