Modelling three-dimensional data from photographs uses map with contours to provide ground plan and altitude, and stereoscopic photographs for building size

摘要

The method involves using a pair of stereoscopic images and a flat map of a region. Initially, the ground plan of the blocks of buildings is extracted from the map. The characteristic height for each of the buildings is calculated from the pair of images. The altitude of the terrain associated with the buildings is then determined. This information is extracted from analysis of the contours of the map of the region. Detailed values may be determined by a triangulation technique. The construction of the three-dimensional model on the basis of this information. The information is processed in digital format in order to extract the required data.