| 一种基于Curvelet变换的指纹图像增强方法 |
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| 引用本文： | 段群,吴粉侠,韩改宁.一种基于Curvelet变换的指纹图像增强方法[J].电子测量技术,2009,32(2):124-127. |
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| 作者姓名： | 段群 吴粉侠 韩改宁 |
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| 作者单位： | 咸阳师范学院计算机科学系,咸阳,712000 |
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| 基金项目： | 咸阳师范学院专项科研基金 |
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| 摘 要： | Curvelet变换具有各向异性和多方向性等良好特性,是表示分段平滑曲线边缘的最优基。为了确保指纹特征提取算法的鲁棒性,需要对原始含噪指纹图像进行预处理以增强纹线的清晰度,增加脊线和谷线的对比度,减少伪信息。本文提出了一种基于Curvelet变换的指纹图像增强方法,该方法对Curvelet变换后的低频系数实现线性灰度拉伸,以增强其对比度,而高频系数采用阈值去噪。仿真实验表明,该方法优于常用的空间域直方图均衡化和小波域图像增强法,具有良好的视觉效果。
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| 关 键 词： | 曲波变换 小波变换 指纹图像 |
Fingerprint image enhancement method based on the curvelet transform |
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| Duan Qun,Wu Fenxia,Han Gaining.Fingerprint image enhancement method based on the curvelet transform[J].Electronic Measurement Technology,2009,32(2):124-127. |
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| Authors: | Duan Qun Wu Fenxia Han Gaining |
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| Affiliation: | Department of computer;Science Xianyang Normal University;Xianyang 712000 |
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| Abstract: | Curvelet transform has certain perfect characteristics such as anisotropy and directionality.It's the optimal basis for the representation of the edges of smooth curves.In order to ensure the robustness of the minutiae extraction algorithm from the input fingerprint images,it is essential to preprocess the original fingerprint images to enhance the ridge clarity and the contrast of the ridge and valley,and reduce spurious ridge information.The paper gives an algorithm of fingerprint image enhancement based ... |
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| Keywords: | curvelet transform wavelet transform fingerprint image |
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