Image-based rendering techniques are often the preferred choice to accelerate the exploration of massive outdoor models and complex human-made structures. In the last few years, relief mapping has been shown to be extremely useful as a compact representation of highly-detailed 3D models. In this paper we describe a rendering system for interactive, high-quality visualization of large scale urban models through a hierarchical collection of properly-oriented
relief-mapped polygons. At the heart of our approach is a visibilityaware algorithm for the selection of the set of viewing planes supporting the relief maps. Our selection algorithm optimizes both the sampling density and the coverage of the relief maps and its running time is mostly independent on the underlying geometry. We show that our approach is suitable for navigating through large scale urban models at interactive rates while preserving both geometric and
CitationAndujar, C.; Díaz, J.; Brunet, P. Relief impostor selection for large scale urban rendering. A: IEEE Virtual Reality Workshop on Virtual Cityscapes: Key Research Issues in Modeling Large-Scale Immersive Urban Environments. "2008 IEEE Virtual Reality Workshop on Virtual Cityscapes: Key Research Issues in Modeling Large-Scale Immersive Urban Environments". Reno, Nevada: 2008.
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