关键词: 指纹配准, 有限元, 模糊贴近度, 指纹特征点

Abstract: Fingerprint registration algorithm is studied for the complexity and variety of fingerprint deformation. Because the existing fingerprint registration algorithms have the defects of high complexity, low precision, slow speed and easy to be affected by fingerprint deformation, this paper introduces finite element analysis theory, and proposes a fingerprint registration algorithm based on finite element. In this algorithm, discrete finite element is used as basic unit to simulate the deformation of whole elastomer for complex deformation in fingerprint images. It takes the turning point, bifurcation point, the number of ridge lines between two points in fingerprint images and so on as the features. The fuzzy similarity is creatively proposed as metric for solving the overall stiffness equation to complete fingerprint registration. The experimental results show that the error of displacement of the proposed algorithm is the smallest and the time is 8.894 seconds, it lowers the complexity, and also improves the precision. At the same time, it can avoid the influence of the complexity and variety of fingerprint deformation on the accuracy of the fingerprint registration algorithm.

Key words: fingerprint registration, finite element, fuzzy similarity, fingerprint feature points