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第6期 赵慧敏,等:基于三高斯滤波的低质指纹图像增强方法 ·493 对比度提高更多,且自适应地淡化了黑影,效果很好。 [4]ZHIXIN S,GOVINDARAJU V.Fingerprint image enhance- ment based on skin profile.Approximation C]//Proc Int Conf on Patter Recognition.Hong Kong,China,2006,3: 714-717. [5]GONZALEZ R C,WOODS R E.Digital image processing [M].2nd ed.Beijing:Publishing House of Electronics In- dustry,2003:78-88. [6]WIN Z M,SEIN MM.Fingerprint recognition system for (a)FVC2004原图(b)灰度归一化(c)Sigmoid拉伸 low quality images [C]//SICE Annual Conference 2011. Tokyo,Japan,2011:1133-1139. [7]AKRAM M U,AYAZ A,IMTIAZ J.Morphological and gradient based fingerprint image segmentation [C]//2011 Intemational Conference on Information and Communication Technologies(ICICT).Karachi,Pakistan,2011:1-4. [8]MA J,JING X J,ZHANG Y Y.Simple effective fingerprint segmentation algorithm for low quality images[C]//2010 (d)基于块的直方图均衡化(e)维纳滤波 3rd IEEE Interational Conference on Broadband Network and Multimedia Technology (IC-BNMT).Beijing,China, 2010:855859. [9]GREENBERG S,ALADJEM M,KOGAN D.Fingerprint image enhancement using filtering techniques[J].Real- Time Imaging,2002,8(3):227-236. [10]LI C Y,PEI X.Role of the extensive area outside the x- cell receptive field in brightness information transmission (f)双边滤波(g)三高斯滤波 [J].Vision Research,1991,31(9):1529-1540 图6FVC2004指纹图像对比结果 [11]金小贤,李卫军,陈旭,等.一种基于视觉特性的仿生图 Fig.6 Results of comparison between our algorithm 像增强算法[J].计算机辅助设计与图形学学报, and others on FVC2004 fingerprint images 2010,22(3):534-537. JIN Xiaoxian,LI Weijun,CHEN Xu,et al.Study on bio- 3结束语 mimetic processing method of face image[J].Journal of Computer-Aided Design and Computer Graphics,2010,22 本文实验算法合理引入非经典三高斯滤波函 (3):534-537 数,采用自适应于指纹图像处理的参数,获得邻域主 作者简介: 观感觉亮度,再进行局部对比度线性调整,获得最终 赵慧敏,女,1988年生,硕士研究 图像.该算法对于图像质量高的指纹,处理效果不逊 生,主要研究方向为图像处理与模式识 于其他方法;对低质量的指纹图像增强效果更加明 别新理论、新方法. 显,不仅提高了脊和谷的对比度,而且能够自适应地 将灰暗区域亮度提高,有利于后续处理的同时,也便 于人眼观察,为人工参与鉴别提供帮助, 李卫军,男,1975年生,副研究员, 参考文献: 主要研究方向为图像处理、模式识别、 [1]MALTONI D,MAIO D,JAIN A K,et al.Handbook of fin- 智能信息处理,发表学术论文多篇 gerprint recognition[M].2nd ed.London:Springer-Ver- lag,2009:131-133. [2]HONG L,WAN Y,JAIN A K.Fingerprint image enhance- ment:algorithms and performance evaluation[J].IEEE 刘扬阳,女,1976年生,副研究员, Transactions on Pattern Analysis and Machine Intelligence, 主要研究方向为光电成像技术与图像 1998,20(8):777-789. 处理、模式识别,发表学术论文多篇 [3]KIM B G,PARK D J.Adaptive image normalisation based on block processing for enhancement of fingerprint image [J].Electronics Letters,2002,38(14):696-698
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