Extraction of 3D navigation space in virtual urban environments
Author
Yılmaz, Türker
Güdükbay, Uğur
Date
2005-09Source Title
13th European Signal Processing Conference, EUSIPCO 2005
Publisher
IEEE
Pages
105 - 108
Language
English
Type
Conference PaperItem Usage Stats
87
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views
18
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downloads
Abstract
Urban scenes are one class of complex geometrical environments in computer graphics. In order to develop navigation systems for urban sceneries, extraction and cellulization of navigation space is one of the most commonly used technique providing a suitable structure for visibility computations. Surprisingly, there is not much work done for the extraction of the navigable area automatically. Urban models, except for the ones where the building footprints are used to generate the model, generally lack navigation space information. Because of this, it is hard to extract and discretize the navigable area for complex urban scenery. In this paper, we propose an algorithm for the extraction of navigation space for urban scenes in threedimensions (3D). Our navigation space extraction algorithm works for scenes, where the buildings are in high complexity. The building models may have pillars or holes where seeing through them is also possible. Besides, for the urban data acquired from different sources which may contain errors, our approach provides a simple and efficient way of discretizing both navigable space and the model itself. The extracted space can instantly be used for visibility calculations such as occlusion culling in 3D space. Furthermore, terrain height field information can be extracted from the resultant structure, hence providing a way to implement urban navigation systems including terrains.
Keywords
3D navigationCellulization
Occlusion culling
Urban visualization
View-cells
3-D space
3D navigation
Building footprint
Building model
Cellulization
Occlusion culling
Space extraction
Terrain height
Urban environments
Urban model
Urban scenes
View-cells
Visibility calculation
Visibility computation
Algorithms
Navigation systems
Signal processing
Three dimensional
Visibility
Visualization
Three dimensional computer graphics
Permalink
http://hdl.handle.net/11693/27348Published Version (Please cite this version)
https://ieeexplore.ieee.org/document/7077894Collections
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