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Fast display of large‐scale forest with fidelity
Author(s) -
Zhang Huaisheng,
Hua Wei,
Wang Qing,
Bao Hujun
Publication year - 2006
Publication title -
computer animation and virtual worlds
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.225
H-Index - 49
eISSN - 1546-427X
pISSN - 1546-4261
DOI - 10.1002/cav.69
Subject(s) - computer science , rendering (computer graphics) , quadrilateral , fidelity , computer graphics (images) , computer vision , artificial intelligence , scale (ratio) , tree (set theory) , cartography , mathematics , telecommunications , mathematical analysis , physics , finite element method , thermodynamics , geography
Abstract We propose a new hierarchical representation for a forest model, namely hierarchical layered depth mosaics (HLDM). Each node in the HLDM comprises a number of discrete textured quadrilaterals, called depth mosaics (DMs). The DMs are generated from the sampled depth images of the polygonal tree models. Meanwhile, their textures are compressed by a new approach accounting for occlusion. Our rendering procedure traverses the HLDM and renders the appropriate nodes according to a view‐dependent selection criterion. A blending scheme is adopted to mitigate the visual ‘popping’ caused by the transition of levels of detail. The experiment demonstrates that the viewer could interactively walk or fly above the forest with fidelity. Copyright © 2006 John Wiley & Sons, Ltd.