基于河流特征的DEM与遥感影像配准  

A Method of Registration Between DEM and RS Image Based on the Feature of Stream

作　　者：王辉[1,2] 王思远[1] 殷慧[1,2] 毕海芸[1,2] 赵岩[1,2] 

机构地区：[1]中国科学院对地观测与数字地球科学中心,北京100094 [2]中国科学院研究生院,北京100049

出　　处：《遥感信息》2012年第4期13-15,33,共4页Remote Sensing Information

基　　金：国家973项目:“空天地一体化对地观测传感网的理论与方法(No:2011CB707100)”;国家重大科学装置项目“航空遥感系统”中:“面向科学目标的应用支撑系统”的支持

摘　　要：针对DEM数据地物特征不明显,控制点不易选取,从而造成与影像配准困难的情况,提出根据DEM生成河流信息,利用河流交叉点及河流拐点作为控制点,然后再与遥感影像进行配准的方法。该方法首先根据DEM确定河流流向,根据河流流向计算每个栅格的汇流累积量,而后根据汇流累积量提取河流信息,最后根据生成的河流信息提取关键特征点,从而实现DEM与遥感影像的配准。通过对北京密云地区ETM影像与DEM数据进行配准试验,证明了该方法的可行性。The object features of DEM data are not clear,and it is difficult to select the control points,which contributes to the problem of registration with RS image. In this situation,this paper presents a method that uses river junctions and turning points as control points for registration. Firstly,the paper gets the flow direction data based on DEM and calculates the flow ac- cumulation, then extracts the stream information. What＇s more,it extracts the key feature points according to the stream information,which can be used in registration between DEM data and RS image. Finally, this paper uses the ETM image and DEM data of Beijing to testify the method suggested by this paper,and success of the test proves feasibility of this method.

关 键 词：DEM 河流特征 影像配准 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]