【摘要】 本文提出了一个新的无控制DEM差异探测算法。它可以将不同时期获取的DEM纳入到统一坐标系中,这样就可以根据匹配后的DEM来定量探测地表变化情况。该方法通过差分模型考虑了观测量的数值及其相互关系。与目前差异探测能力最强的LMS-LZD方法相比,新方法具有更好的差异能力和更高的匹配精度。普歪沟泥石流沟多时相DEM差异探测实例验证了新方法的优越性。更多还原

【Abstract】 This paper proposes a new DEM deformation detection method without control points that can bring DEMs obtained in different epochs into common coordinate system.Therefore,the surface deformation can be detected with fixed-quantity according to the matched DEMs.The new method takes both the magnitude and the relationship of observations into account by introducing the differential model.Comparing with the LMS-LZD method that reaches highest detection percentage so far,the new method has higher ability of deformation detection and matching accuracy.The experimental results based on real data sets,the multi-temporal DEMs of PUWAIGOU,validate the advantage of the new method.更多还原