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A framework which includes six major components has been developed to reconstruct 3D building models from airborne LiDAR measurements. The application of the framework to both commercial and adjacent residential areas shows that the proposed methods identified building patches well, and reconstructed 3D building models effectively. The entire process is highly automatic and requires little human aid,...
The problems on how to make full use of the existing network resources should be resolved as soon as possible. By achieving this goal, the geographic information can be shared on the Internet. Also, social management, social standards and the quality of life could be enhanced. Moreover, the management of social and people's lives will change in the remote manner. The main issue is to build a geographic...
This research paper aims at extracting features, especially the plane feature, of building from Light Detection And Ranging (LiDAR) point clouds in Urban Area, and with these features and information to build the model of object. Unlike modeling object in other fields, such as reverse engineering, surfaces of building usually consist of abundant big and plane surfaces which are significant features...
As the resolution of new earth observation sensors increases, a precise modeling of the signal is necessary for the urban medium. For very high spatial resolution, 3D structure and directional effects must be taken into account. This paper aims to estimate the contribution of the facades and the directional properties in the simulation of at sensor signals. Two opposite urban scenes illustrate this...
Recently, research towards using 3D city models for personal navigation has been rapidly increasing. In this paper, an approach for 3D city model reconstruction for the application of mobile phone-based navigation is presented, which is based on data collected from vehicle-based mobile mapping system (MMS). Our method is performed based on three objectives: small model size, perfect accuracy control...
3D modeling techniques have less been established and are still being studied theoretically without explicit implementations. Currently used 3D models, which are primarily focused on visualization and lack topological structure, have limitation in being used for 3D spatial analyses and applications. Through storing 3D objects in a spatial DBMS, we can construct topology-based models and use them for...
Focus of the paper lies on automated texturing of 3d building models with images recorded with infrared (IR) cameras. Therefore, a data fusion of given 3d models and recorded IR image sequences is performed. A relative orientation of the images of the sequence is generated using Nister's five-point algorithm and image triplets. This results in a point cloud of correspondence points and a relative...
For urban area orthorectification, in order to orthorectify a building to its correct, upright position, the building must be represented as part of the surface to be rectified. Therefore, an exact digital building model, which describes the building structure, three-dimensional coordinates, topologic relationship, etc., is required. This paper first presents the parametrerized CSG building model...
This paper presents systematic approaches to create photo-realistic three-dimensional (3D) digital city systems. In the created 3D digital city systems, prismatic and polyhedral building models are constructed from assorted remote sensing and spatial datasets, including topographic maps, aerial and satellite images, airborne and ground-based LIDAR point clouds. Close-ranged digital photographs and...
3D building modeling has emerged as a focus of research as well as development for many urban planning and geo-information related applications. To its most abstract form on geometric level, 3D building roofs are regarded as the fundamental elements to present outlines of 3D building models. The emphasis of this study is to demonstrate a novel algorithm of building roof reconstruction, termed CSR...
The automated extraction of topographic objects has been on the research agenda in the Photogrammetry and Computer Vision communities for more than two decades. Considerable progress has been achieved, though up to now there are hardly any commercial products that have been accepted by the market. Recent developments in the field of sensor technology, along with advanced techniques for data processing,...
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