DEM evaluation by an operator and facets stereo vision: a comparison based on close-range imagery

摘要

Abstract: In this paper we compare the results of DEM estimation by a photogrammetric operator with the analytic plotter LEICA AC3 and an automatic object space based reconstruction method (Facets Stereo Vision). We are working with close-range images of natural stone surfaces, taken in cooperation with curators of monuments to monitor the weathering of stones. Two windows representative of the surface were selected and DEMs evaluated by an operator and Facets Stereo Vision. For the computation with Facets Stereo Vision a horizontal plane was introduced as initial value. Image pyramid techniques were applied for the final DEM estimation. Differences, problems of the comparison, and the results are discussed. !10