Gabor滤波的指纹图像增强的应用研究  

Application Research on Fingerprint Image Enhancement Based on Gabor Filter

作　　者：雷求胜 Lei Qiusheng(College of Electronic Science and Engineering,Hunan University of Information Technology,Changsha 410151,China)

机构地区：[1]湖南信息学院电子科学与工程学院,长沙410151

出　　处：《单片机与嵌入式系统应用》2021年第10期32-35,共4页Microcontrollers & Embedded Systems

摘　　要：在大多数指纹采集过程中都会受到手指皮肤干湿度、皮肤受损程度和采集时手指压力度等因素的影响,从而导致采集的指纹图像中脊线有明显的断痕,存在大量的低质量区。为了提高指纹采集图像的清晰度,进而提升指纹识别的准确率和识别速度,本文选用Gabor滤波算法来增强指纹图像,其中包括对图像进行归一化、估算指纹方向场和频率场以及Gabor滤波这三个过程。仿真结果表明,对原指纹图像进行Gabor滤波后,可以很好地增强和改善指纹图像中的低质量区域。In the fingerprint acquisition process,it will be affected by the factors such as the humidity of finger skin,the degree of skin damage and the pressure of finger during the acquisition,which will lead to obvious broken lines and a large number of low-quality areas in the collected fingerprint image.In order to improve the clarity of fingerprint image,improve the accuracy and recognition speed of fingerprint recognition,Gabor filtering algorithm is used to enhance the fingerprint image,which includes three processes:image normalization,fingerprint direction field and frequency field estimation,and Gabor filtering.The simulation results show that Gabor filtering can enhance and improve the low quality areas of the original fingerprint image.

关 键 词：GABOR滤波器 指纹识别技术 指纹图像增强 图像处理 

分 类 号：TN957.52[电子电信—信号与信息处理]