Enhacing building facade using mobile LiDAR

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The interest in generating 3D models is motivated by a wide range of applications, such as video games, Virtual, Augmented, and Mixed Reality, 3D vehicle navigation, surveillance, visualization, urban planning, solar potential analysis, and Geographic Information Systems (GIS). In recent years, the demand for 3D detailed building models containing doors, windows or balconies has dramatically increased. These needs arise particularly from 3D GPS navigation systems and on-line services such as Google Earth and Bing Maps. Currently, automatic generation of box-like 3D coarse building models is viable. However, these resultant building models lack detailed building facade information and are not suitable for applications where detailed building models at street level is required. The creation of 3D detailed building models is still a manual and labor-intensive process. LiDAR (Light Detection And Ranging) technology, has proven very effective for many geo-applications such as 3D urban modeling and rendering. Mobile LiDAR systems collect 3D and visual data while vehicles drive at a posted speed. The ability of producing highly accurate 3D points with sufficient detail make the mobile LiDAR a great data source for detailed 3D model generation. This project addresses challenging problems in creating 3D detailed building models by integrating street-level mobile LiDAR with coarse building models from Google Earth or other sources. This includes registration of partially scanned LiDAR data with coarse models and detail transfer from LiDAR to the models. The detailed building models can improve 3D map accuracy and also have many potential applications in building information modeling (BIM) and urban planning etc. The proposed approach is a cost-effective solution and the automated process will significantly improve productivity of detailed 3D map generation. The results will have a substantial economic impact on the mapping and navigation industry, location-based service providers, as well as social benefits to Canada as a whole.