一种指纹图像预处理算法探究

摘要

This paper studies the fingerprint image preprocessing method,it introduces the methods such as the fingerprint segmentation based on image local variance,fingerprint binarization based on directional field and the context-filter combined with average filter and separation filter at first,and finally puts forward the fingerprint thinning method based on improved OPTA algorithm,MATLAB simulation results show that this method overcomes the noise effect,image thinning effect is good.%本文主要针对指纹图像预处理方法进行研究，提出了基于图像局部方差的指纹分割、基于方向场的指纹二值化和基于水平滤波器与分离滤波器组合的上下文滤波方法，最后提出了基于改进OPTA算法指纹细化方法，MATLAB仿真结果表明，本文的方法克服了噪声影响，图像细化效果良好。