基于方向场信息和灰度特征的指纹分割算法研究

摘要

Fingerprint image segmentation is a key step in the pre-processing, with the purpose of facilitating the effective extraction of fingerprint image feature. According to the basic principles of the common fingerprint segmentation process, this paper summarizes two common segmentation algorithms:methods of information-based approach and the statistical properties of the base direction. On this basis, this paper proposed segmentation algorithm based on orientation field information and gray feature, the results showed that:this method can efficiently and reliably segment fingerprint image, and the segmentation effect can meet the fingerprint image pre-processing purposes.%指纹图像分割是指纹图像预处理过程中的关键步骤，目的是便于指纹图像特征点的有效提取。根据常见的指纹分割处理的基本原理，归纳总结了两种常用的分割算法：基于统计特性的方法和基于方向信息的方法。在此基础上，提出基于方向场信息和灰度特征的分割算法，结果表明：此法可以有效、可靠地进行指纹图像分割，分割效果达到指纹图像预处理的目的。