剪切波变换下的侧扫声呐图像降噪方法  

Side-scan sonar image denoising method under shearlet transform

作　　者：王磊[1,2] 金绍华 崔杨 魏源 WANG Lei;JIN Shaohua;CUI Yang;WEI Yuan(Department of Military Oceanography and Hydrography and Cartography,Dalian Naval Academy,Dalian 116018,China;No.92763 Unit of PLA,Dalian 116041,China;No.91937 Unit of PLA,Zhoushan 316002,China)Abstract:In view)

机构地区：[1]海军大连舰艇学院军事海洋与测绘系,辽宁大连116018 [2]中国人民解放军92763部队,辽宁大连116041 [3]中国人民解放军91937部队,浙江舟山316002

出　　处：《舰船科学技术》2022年第3期129-134,共6页Ship Science and Technology

基　　金：国家自然科学基金资助项目(41876103)。

摘　　要：针对侧扫声呐图像对比度低、噪声强度大特点导致的部分传统滤波方法降噪能力的不足,提出一种基于剪切波变换的侧扫声呐图像降噪方法。首先对侧扫声呐图像进行剪切波变换,在考虑噪声水平的基础上,对剪切系数进行阈值处理,再将修正后的系数进行剪切波逆变换,重构侧扫声呐图像,实现了侧扫声呐图像的降噪。实验结果表明,该方法相比于维纳滤波、小波滤波和非局部均值滤波等常用降噪方法,可以获取更好的图像效果,在侧扫声呐图像降噪中具有综合优势。In view of the fact that the side-scan sonar image has the characteristics of low contrast and large noise intensity,which led to noise reduction effect of some traditional filter methods is insufficient,a denoising method based on shearlet transform is proposed.First,the side-scan sonar image is divided with shearlet transform.Then,shearlet coefficients are processed by the threshold method considering the noise measrement.Finally,the image is reconstructed through the inverse shearlet transform with the amended coefficients,and the purpose of image denoising is realized.The experiment results show that the method of this paper is suitable for side-scan sonar image processing,obtains better image denoising effect than Wiener filtering,wavelet filtering and non-local means filtering,has comprehensive advantages in side-scan sonar image noise reduction.

关 键 词：侧扫声呐 图像降噪 多尺度几何分析 剪切波变换 

分 类 号：P229.3[天文地球—大地测量学与测量工程]