| 基于复小波变换的SAR图像斑点滤波方法 |
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| 引用本文： | 张春华,许素芹,陶荣华,陈标.基于复小波变换的SAR图像斑点滤波方法[J].测绘学院学报,2005,22(4):269-271. |
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| 作者姓名： | 张春华 许素芹 陶荣华 陈标 |
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| 作者单位： | [1]海军航空工程学院,山东烟台264001 [2]海军潜艇学院,山东青岛266071 |
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| 摘 要： | 斑点噪声的存在使得SAR图像的应用受到较大的限制.文中首先介绍了SAR图像斑点噪声模型以及几种常用的SAR斑点噪声抑制方法;然后对小波变换斑点噪声滤波方法进行分析,提出了基于二元树复小波变换的SAR图像滤波方法.实验比较表明,二元树复小波变换抑制SAR斑点噪声效果明显,较小波变换更具有优越性.
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| 关 键 词： | 合成孔径雷达 斑点噪声 小波变换 二元树复小波变换 |
| 文章编号： | 1009-427X（2005）04-0269-03 |
| 收稿时间： | 2005-05-11 |
| 修稿时间： | 2005-09-18 |
Analysis of Speckle Reduction of SAR Images Based on 2D Complex Wavelet |
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| ZHANG Chun-hua, XU Su-qin, TAO Rong-hua, CHEN Biao.Analysis of Speckle Reduction of SAR Images Based on 2D Complex Wavelet[J].Journal of Institute of Surveying and Mapping,2005,22(4):269-271. |
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| Authors: | ZHANG Chun-hua XU Su-qin TAO Rong-hua CHEN Biao |
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| Institution: | 1 .Navy Aeronautical Engineering Institute, Yantai 264001, China; 2 .Navy Submarine Academy, Qingdao 266071, China |
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| Abstract: | The application of SAR image is greatly limited because of the existence of coherent speckle.In this paper,after a brief review of model for speckle and conventiaonal filters for SAR speckle reduction,wavelet-based soft-thresholding and hard-thresholding filter for SAR speckle reduction are presentend.Owing to the advantages of shift-invariance and excellent spatial orientations,the dual-tree complex wavelet transform is used to reduce SAR speckle noise.Experimental result shows that,comparing to the discrete wavelet transform(DWT),the dual-tree complex wavelet is more efficient in the area of reducing SAR speckle noise. |
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| Keywords: | SAR speckle noise wavelet transform dual-tree complex wavelet transform |
| 本文献已被 CNKI 维普 等数据库收录！ |
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