基于分数进制轮廓波变换的DEM多尺度表达  

Multi-scale Representation of DEM Based on Fractional Contourlet Transform

作　　者：王海江[1] 姚付启[2] 李丽宏[1] 马永强[1] 杨勤科[3] 王静璞 WANG Haijiang;YAO Fuqi;LI Lihong;MA Yongqiang;YANG Qinke;WANG Jingpu(School of Information and Electrical Engineering,Hebei University of Engineering,Handan,Heibei 056038,China;Institute of Agricultural Water Conservancy,Changjiang River Scientific Research Institute,Wuhan 430012,China;Department of Urban and Resource Sciences,Northwest University,Xi’an 710069,China;School of Resources and Environmental Engineering,Ludong University,Yantai,Shandong 264025,China)

机构地区：[1]河北工程大学信息与电气工程学院,河北邯郸056038 [2]长江科学院农业水利研究所,武汉430012 [3]西北大学城市与资源学系,西安710069 [4]鲁东大学资源与环境工程学院,山东烟台264025

出　　处：《计算机工程》2018年第9期286-295,300,共11页Computer Engineering

基　　金：国家重点研发计划项目(2016YFC0400206-04);国家自然科学基金(41701005;51309016);长江科学院创新团队项目(KSF2017064/NS);河北省自然科学基金(D2015402159;F2015402150);河北省高等学校科学技术研究项目(QN2017311)

摘　　要：现有数字高程模型(DEM)多分辨率表达方法多数属于冗余变换,冗余量随变换尺度的增大而剧增,无法有效表达多尺度地形轮廓结构。为此,提出一种有效表达不同尺度地形特征的无冗余DEM多分辨率表达方法。整合现有无冗余分数进制小波变换的多尺度变换结构与轮廓波变换的多方向滤波器组,在此基础上构建无冗余分数进制轮廓波变换。实验结果表明,该方法能够有效保留DEM的宏观统计特征与局部地形细节,具有无冗余性且算法复杂度较低。Most of the existing Digital Elevation Model(DEM)multi-resolution representation method are redundant transformation.The redundancy increases sharply with the increase of the scale of the transformation,so it cannot effectively express the multi-scale terrain contour structure.Therefore,a multi-resolution representation method of DEM is proposed,which is non-redundant and can effectively represent the topographic features of different scales.The multi-scale transform structure of non-redundant fractional band wavelet transform is integrated with the multidirectional filter bank of contourlet transform,and the non-redundant fractional decimal contourlet transform is constructed.The experimental results show that,the proposed method can preserve the macroscopic statistical features and local terrain details of DEM effectively,has no redundancy,and the complexity of the algorithm is low.

关 键 词：数字高程模型 分辨率 冗余 小波变换 轮廓波变换 

分 类 号：P282[天文地球—地图制图学与地理信息工程]