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Perception-Guided Simplification for Real Time Navigation of Very Large-Scale Terrain Environments

  • Sheng Li
  • JunFeng Ji
  • XueHui Liu
  • GuoPing Wang
  • EnHua Wu
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3980)

Abstract

Interactive navigation over very large-scale terrain environments is a highly challenging topic since the model involved often contains huge amount of geometries and textures, even exceeds the capacity of system memory. In this paper, we put forward a high-performance technique for real-time walkthrough in very large-scale terrain environments. By the technique, perception-guided simplification is adopted through application of a new error metric-Constrained Normal Cone in the preprocessing stage. Both silhouette-preserving and shading-preserving criteria are satisfied in our navigation system. Furthermore, the pre-extracted Potential Silhouette from each block can be used to construct the incremental horizon at run time for delicate visibility testing. The consequent visibility information then can prevent the unnecessary data from loading into the main memory, so that the workload of out-of-core data paging and the number of triangles rendered are substantially reduced, and the frame rates are highly increased. Experiment results show the high performance of our novel approach.

Keywords

Graphic Processing Unit Geometric Error Data Paging Real Time Navigation Slave Thread 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Sheng Li
    • 1
    • 2
  • JunFeng Ji
    • 2
    • 4
  • XueHui Liu
    • 2
  • GuoPing Wang
    • 1
  • EnHua Wu
    • 2
    • 3
  1. 1.School of Electronics Engineering and Computer SciencePeking UniversityChina
  2. 2.State Key Lab. of Computer Science, Institute of SoftwareCASChina
  3. 3.Dept. of Computer and Information ScienceUniversity of MacauMacaoChina
  4. 4.State Information Center of ChinaBeijingChina

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