抄録
Recently, the analysis of geographical features by digital elevation models (DEM) which are made fromsatellite images, has become a widely researched topic. However, espacially in the case of old satelliteimage, DEM or the stereo pair to make it might be hard-to-find. Then we developed the estimation methodfor three-dimensional detailed geographical features shape using shadow of satellite images. In this study, weinvestigated the influence on the result of estimation by choosing the boundary of a shadow. Also, weexamined the threshold of the brightness to discern the shadows of geographical features from old satelliteimages.
