指纹图像的直方图增强技术研究

Research of Fingerprint Image Enhancement Based on Histogram

在对比指纹图像的灰度直方图增强的技术的基础上,针对均衡化算法的不足和现有直方图规定化算法中映射规则计算量大的情形,提出一种改进的规定化算法。该算法简单易实现,能有效提高图像的对比度,为指纹图像的后续处理工作奠定坚实基础。

This paper studies the method of fingerprint image enhancement based on gray level histogram. In view of the shortcoming of direct histogram equalization and big work of mapping law’s calculate in histogram specification,proposed one kind of improvement stipulation algorithm.This algorithm is simple and easy to realize.This algorithm can enhance the picture contrast gradient effectively .This method can make stability foundation for after processing task of fingerprint image.