摘要
为了增强指纹图像预处理的效果,在对现有算法深入研究的基础上,提出一种新的指纹图像增强算法。先利用Radon变换来获得图像的方向图,然后利用方向滤波器对该图像进行滤波,达到指纹图像增强的目的。实验结果表明,该算法使断开的脊线得到连接,叉连线得到消除,脊线和谷线得到了分离。该算法与传统方法相比,增强效果明显,且算法简单,为下一步指纹图像识别奠定了坚实的基础。
In order to improve the fingerprint image,on the basis of studies of the available algorithms,this paper puts for- ward a new enhancement algorithm for fingerprint images. Firstly, Radon transform is used to estimate the orientation image of the fingerprint image. Then, the fingerprint image is filtered by the direction filters. Finally, the enhanced fingerprint image is gained. The experiment indicates that the disconnected ridge lines are linked together, the crossed lines are eliminated, ridge and valley lines are isolated. It improves the quality of the fingerprint image greatly. Compared with the traditional method, this algorithm is simple and efficient. It establishes the solid foundation to following works.
出处
《现代电子技术》
2009年第1期84-86,共3页
Modern Electronics Technique
基金
山西省科技攻关项目(4123009)
关键词
RADON变换
纹线方向
方向图
方向滤波器
Radon transform
direction of ridge
direction - map
direction filters
