面向地理国情普查的地表覆盖解译技术与方法

发布时间：2018-01-25 23:33

本文关键词： 地理国情普查地表覆盖影像分割面向对象分类高分辨率遥感影像　出处：《辽宁工程技术大学》2013年硕士论文　论文类型：学位论文

【摘要】：地理国情普查是获取国情国力信息的重要手段,是掌握自然资源、生态环境以及人类活动基本情况的综合性、基础性工作。本文从地理国情普查的应用角度出发,重点研究面向地理国情普查的高分辨率遥感影像的解译技术和方法,制定地表覆盖解译流程,研制面向地理国情普查的地表覆盖解译软件,并开展相关的实验。主要包括以下工作： (1)引入了MPI技术,研究了影像的并行多尺度分割方法,16个进程下的运行速度是单个进程的8倍,提高了影像分割的效率；研究DLG数据辅助的分割方法,对分割边界进行约束。 (2)探索出“分层逐级分类”的分类策略,根据遥感影像和地表覆盖地物要素的复杂性,综合考虑影像光谱、形状和纹理特征,构建分层的分类树,按照“先易后难”的原则,实现基于决策树和SVM的面向对象分类。 (3)针对地理国情普查的特点和当前影像解译精度不高、后编辑工作量大等问题,制定面向地理国情普查的地表覆盖解译技术流程,完成了临潼区的WorldView-2的影像的解译,解译精度达到了81%以上,验证了地表覆盖解译流程的可行性。
[Abstract]:The general survey of geographical conditions is an important means to obtain the information of national conditions and national strength. It is also a comprehensive way to master the natural resources, ecological environment and the basic situation of human activities. This paper focuses on the interpretation technology and method of high-resolution remote sensing image for geographical situation census, and formulates the interpretation process of ground cover. To develop a ground cover interpretation software for GIS census, and to carry out related experiments. The main work includes the following: 1) the parallel multi-scale image segmentation method is studied by introducing MPI technology. The speed of 16 processes is 8 times that of a single process, and the efficiency of image segmentation is improved. The DLG data aided segmentation method is studied, and the segmentation boundary is constrained. According to the complexity of the elements of remote sensing image and ground cover, and considering the spectral, shape and texture features of the image, the hierarchical classification tree is constructed. 2) the classification strategy of "hierarchical classification" is explored, and the hierarchical classification tree is constructed according to the complexity of the elements of remote sensing image and ground cover. According to the principle of "easy before hard", the object-oriented classification based on decision tree and SVM is realized. 3) aiming at the problems such as the characteristics of the general survey of geographical conditions, the low precision of image interpretation at present, and the heavy workload of post-editing, the technical flow of surface coverage interpretation for the survey of geographical conditions is formulated. The interpretation of WorldView-2 images in Lintong District is completed, and the interpretation accuracy is more than 81%, which verifies the feasibility of the interpretation process of ground cover.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P237

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