SIGGRAPH '96 Proceedings of the 23rd annual conference on Computer graphics and interactive techniques
Efficient Interactive Rendering of Detailed Models with Hierarchical Levels of Detail
3DPVT '04 Proceedings of the 3D Data Processing, Visualization, and Transmission, 2nd International Symposium
LOD generation for 3d polyhedral building model
PSIVT'06 Proceedings of the First Pacific Rim conference on Advances in Image and Video Technology
Seamless integration of labels into interactive virtual 3D environments using parameterized hulls
Computational Aesthetics'08 Proceedings of the Fourth Eurographics conference on Computational Aesthetics in Graphics, Visualization and Imaging
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In this paper, we present a technique that generalizes 3D building groups of virtual 3D city models according to a cell structure that is derived from infrastructure networks. In addition, the technique handles vegetation areas and outliers such as landmark buildings. Generalized 3D representations abstract from complex, detailed 3D city models and enable storage, analysis, exploration, and interaction at varying levels of scales. Our technique implements the cartographic generalization operators clustering, aggregation, and accentuation; it performs the generalization in four steps: 1) City model components are clustered based on the cell structure. 2) For each cell, the weighted average height is calculated, which is also used to automatically identify outliers. 3) Free space is subtracted from the cells such as in the case of outliers or vegetation areas. 4) The modified cells are extruded to building blocks; vegetation areas and outliers are modeled or, respectively, integrated separately. The paper demonstrates the application of the presented technique by a case study.