Multi-view 3d City Model Generation with Image Sequences

Rapid texture mapping of buildings and other man-made objects is a key aspect for reconstruction of 3D city landscapes. An effective approach by the way of coarse-to-fine 3D city model generation based on digital photogrammetric theory is proposed. Three image sequences, two oblique photography to buildings’ walls and one vertical photography to building’s roof, acquired by digital video camera on a helicopter, coarse 2D vector data of buildings and LIDAR data are used as sources of information. Automatic aerial triangulation technique for high overlapping image sequences is used to give initial values of camera parameters of each image. The correspondence between the space edge of building and its line feature in image sequences is determined with a coarse-to-fine strategy. Hybrid point-line photogrammetric technique is used for accurate reconstruction of buildings. Reconstructed buildings with fine textures superimposed on DSM and orthoimage are visualized realistically.