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：2000
卷号：XXXIII Part B3(/1+2)
页码：51-57
出版社：Copernicus Publications
摘要：In this paper we propose an approach for the automatic extraction of lea.ess deciduous trees from high resolution, i.e., ca. 4 cm ground resolution, aerial imagery taken in spring. In analogy to approaches for building extraction, we make use of the dark shadow of the tree as well as of the fact that the vertical trunk is imaged as a straight line pointing to the nadir point. Hypotheses for the trunk are found via the Hough transform. Branches are tracked by means of hysteresis thresholding. With our approach, it is possible to determine the trunk base, height, and width of the tree. Results show the potential of the approach
关键词：Automatic tree extraction; tree model; Hough transform; hysteresis thresholding
