计算机科学 ›› 2016, Vol. 43 ›› Issue (Z6): 142-148.doi: 10.11896/j.issn.1002-137X.2016.6A.034
董天阳,姚佳洁,纪磊
DONG Tian-yang, YAO Jia-jie and JI Lei
摘要： 在网络环境下进行三维树木模型的绘制与传输,不仅对模型逼真度有着较高要求,还更需保证网络交互的实时性。由于现有的基于几何或图像的三维模型简化方法无法满足网络应用对三维树木的模型细节和网络传输速度的要求,因此提出了一种面向网络应用的三维树木模型简化方法。该方法对树木枝干部分的骨架节点进行提取,并采用非均匀的骨架简化策略对树木模型的枝干部分进行简化；此外,还利用纹理树冠方法对树冠部分进行简化,通过采用凸包纹理模板贴图重构树冠,使得重构后得到的模型与原始模型具有很好的相似度。实验和应用结果表明,面向网络应用的三维树木模型简化方法在保证视觉质量的基础上,能进一步减少模型文件的存储容量,从而提高树木模型的绘制效率及其在网络中的传输速率。
| [1] Lee C H,Varshney A,Jacobs D W.Mesh saliency[J].ACM Transactions on Graphics,2005,24(3):659-666 [2] Marco T,Nico P,Paolo C,et al.Practical quad mesh simplification[J].Computer Graphics Forum,Blackwell Publishing Ltd,2010,29(2):407-418 [3] 金勇,吴庆标,刘利刚.基于变分网格的曲面简化高效算法[J].软件学报,2011,2(5):1097-1105 [4] 偶春生,张佑生.基于特征保持的曲面网格简化[J].计算机应用研究,2013,30(10):3162-3164 [5] Morigi S,Rucci M.Multilevel mesh simplification[J].VisualComputer,2014,30(5):479-492 [6] Remolar I,Chover M,Ribelles J,et al.Geometric Simplification of Foliage[C]∥Proc of Eurographics.2002 [7] Bao Guan-bo,Li Hong-jun,Zhang Xiao-peng,et al.Realistic real-time rendering for large-scale forest scenes[C]∥2011 IEEE International Symposium on VR Innovation (ISVRI).IEEE,2011:217-223 [8] Bao Guan-bo,Li Hong-jun,Zhang Xiao-peng,et al.Large-scale forest rendering:real-time,realistic,and progressive[J].Computers & Graphics,2012,36(3):140-151 [9] Lee J,Kuo C C J.Tree model simplification with hybrid polygon billboard approach and human-centered quality evaluation[C]∥ 2010 IEEE International Conference on Multimedia and Expo (ICME).IEEE,2010:932-937 [10] Gumbau J,Chover M,Remolar I,et al.View-dependent pruning for real-time rendering of trees[J].Computers & Graphics,2011,35(2):364-374 [11] Qin Xue-ying,Eihachiro N,Katsumi T,et al.Fast Photo Realistic Rendering of Trees in Daylight[J].Computer Graphics Forum,Blackwell Publishing,2003,2(3):243-252 [12] Zeng Ji-guo,Zhang Yan,Zhan Shou-yi.3D tree models recon-struction from a single image[C]∥Sixth International Conference on Intelligent Systems Design and Applications(ISDA).IEEE,2006:445-450 [13] Marcelo D G M,Walter M.A hybrid geometry and billboard-based model for trees[C]∥2011 Brazilian Symposium on Games and Digital Entertainment (SBGAMES).IEEE,2011:17-25 [14] Livny Y,Pirk S,Cheng Zhang-lin,et al.Texture-lobes for tree modelling[M]∥ACM Transactions on Graphics (TOG).ACM,2011:76-79 [15] Itti L,Koch C.A saliency-based search mechanism for overt and covert shifts of visual attention[J].Vision Research,2000,40(10-12):1489-1506 |
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