文章基本信息

标题：Multi-Temporal DEM Matching Method without Control Points in Debris-Flow Area
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作者：Qin Jun ; Hu Cheng ; Zhang Tonggang 等
期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2008
卷号：XXXVII-B8
页码：1235-1238
出版社：Copernicus Publications
摘要：Detecting the volume change of loose deposit of rock debris accumulated and debris discharged is one of the methods to study debris flow. The volume can be resulted by overlapping multi-temporal DEM. As traditional method is based on control points, enough matching accuracy will be achieved only if the sufficient corresponding points are available to act as control points. DEM matching without control points provides new alternate approach to complete multi-temporal DEM matching when traditional method fails. Least z-difference (LZD), one of the precise algorithm, deal with two surface only contains random errors. However, multi-temporal DEM of debris flow contains not only the random error, but also non-random error caused by the debris discharged. The effect of E on observation equation is eliminated by giving different Belief Factor (BF) to height difference according to gradient. A test is performed on multi-temporal DEM of debris flow valley located in southwest of China. The experimental results show the RMSE of the method decrease from 4.27m to 1.03 m using BF
关键词：Photogrammetry; Geomorphology; Multitemporal; Change Detection; Matching; Accuracy; Precision