小波基函数选择对SAR干涉图去噪的影响
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
首先简要介绍Daubeachies、Biorthogonal、Symlets、Coiflets、Discrete Meyer和Reverse Biorthogonal六种小波函数的特性,然后以这些小波函数为基函数,采用相同的小波去噪算法对含噪声的模拟SAR干涉图和实际形变干涉图进行去噪实验。实验结果表明:在六种小波函数中,Biorthogonal小波的去噪效果最好,而且计算速度较快,是SAR干涉图去噪的最佳小波基函数。
The properties of six wavelet functions,such as Daubechies,Biorthogonal,Symlets,Coiflets,Discrete Meyer,Re-verse Biorthogonal,are briefly introduced in this paper.Using these wavelet functions as base function,two denoising experi-ments have been performed through a simulated SAR interferogram contaminated by noise and a practical deformation interfero-gram,with the same noise reduction algorithm in wavelet domain.The experiment results show that Biorthogonal wavelet obvi-ously outperforms the other five wavelet functions in term of the noise removal and its computing speed is relatively fast.Therefore,Biorthogonal wavelet is an optimal wavelet base function to noise reduction of the SAR interferogram.
引文
1 Carlos López-Martínez,Xavier Fábregas.Modeling and reduction of SAR interferometric phase noise in the wavelet domain[J].IEEE Trans.Geosci.Remote Sensing,2002(40):2553~2566.
    2何儒云,王耀南.一种基于小波变换的InSAR干涉图滤波方法[J],测绘学报,2006,35(2):128~132.
    3岳焕印,郭华东,范典,李新武,王长林.基于静态小波分解的SAR干涉图滤波[J].高技术通讯,2002(5):5~9.
    4汪鲁才,王耀南,毛六平.基于小波变换和中值滤波的InSAR干涉图像滤波方法[J].测绘学报,2005,34(2):108~112.
    5查显杰.InSAR形变测量及其在地震学中应用的研究[D].合肥:中国科学技术大学,2007.
    6 Ingrid Daubeachies.Ten Lectures on Wavelets[M].Philadelphia:SIAM,1992.
    7杨福生.小波变换的工程分析与应用[M].科学出版社,2000.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心