AUTOMATICALLY TEXTURE EXTRACTION, MAPPING AND 3D VISUALIZAITON OF BUILDINGS FACADES BASED ON HIGH RESOLUTION AERIAL PHOTOS

True orthoimage (TOM) was proposed to solve the problems that DOM generation encountered with high resolution images in urban areas, especially in the areas with high buildings. The correct positions of roof texture are located with the detection of the occlusion and shadows. However, the wall texture is missing after true orthoimage generation. Thus, in this paper, we proposed a method for automatically texture extraction, mapping and 3D visualization of buildings facades based on high resolution aerial photos. There are four major steps: 1) Visibility judgment based on occlusion detection and angle; 2) Optimal texture source selection; 3) Real texture extraction and mapping of building facades; 4) 3D visualization with real texture of building facades. This research can largely reduce workload and provides reference and guidance for applying high resolution images to generate real 3D urban reconstruction.