摘要： 针对指纹匹配过程中基准点定位不准确与耗时长的缺陷，提出一种基于改进基准点定位的指纹匹配算法。该算法借助指纹图像的中心点构造局部细节结构，并在该结构上利用全等三角形原则求取基准点，将所有细节特征转化到极坐标中，利用可变界限盒的方法进行匹配。实验结果表明，该算法所确定的基准点比较准确，且耗时缩短，可提高识别率与执行效率。

关键词: 指纹匹配, 基准点, 中心点, 局部结构, 极坐标

Abstract: Because the fiducial point location is inaccuracy and time-consuming in fingerprint match, a new match algorithm based on improved fiducial point location is proposed. The algorithm constructs a local structure with the help of the core point, and figures out a fiducial point in this structure by using the principle of congruent triangles. All the minutiae features are expressed in polar coordinates, and the final decision can be made with a changeable boundary box method. Experimental results prove that the fiducial point location is more accuracy and the time is saved, thereby the recognition rate and efficiency are enhanced.

Key words: fingerprint match, fiducial point, core point, local structure, polar coordinates

中图分类号: 

• TP301.6