General Framework of Photo-Realistic 3D Visualization of Urban Building

This paper describes general framework of photo-realistic 3D visualization of urban building with digital map, Lidar point and close-range image in photogrammetry community. First, Vanish Point (VP) geometry deduced from classic photogrammetry co-linear equation is used to obtain camera Interior Of Parameter (IOP) and Exterior Of Parameter (EOP) using groups of mutually orthogonal space lines appeared in buildings; Next, "line photogrammetry" is introduced to precisely reconstruct building geometrical model. To this end, coarse building geometry model is generated from digital map and Lidar poin, and further refined with constrains from abundant image line features; After that, texture for each building facet is well reconstructed by applying photogrammetry differential rectification to eliminate texture distortion and detecting texture elements to remove occlusion as well; Finally, two experiments are presented by integrating digital map with ground-level still image and low-altitude aerial video image strips for photo-realistic 3D visualization of building respectively. Contributions are also concluded.