一种三维城市模型多纹理自动合并方法  

A Multi-texture Automatic Merging Approach for the 3D City Models

作　　者：戴雪峰[1] 熊汉江[1] 龚健雅[1] 

机构地区：[1]武汉大学测绘遥感信息工程国家重点实验室,湖北武汉430079

出　　处：《武汉大学学报（信息科学版）》2015年第3期347-352,411,共7页Geomatics and Information Science of Wuhan University

基　　金：国家863计划资助项目(2012BAH35B03;2013AA12A203);深圳科技计划资助项目(ZDSY20120618163343353)~~

摘　　要：大规模三维城市模型的小纹理数量众多,显著增加了模型数据载入次数和绘制批次,极大降低了模型的绘制效率,需要对小纹理合并操作,而传统依赖人工的纹理合并模式效率低。针对该问题本文提出一种基于贪心模拟退火算法的三维城市模型多纹理自动合并方法。首先,使用贪心算法对模型数量众多的小纹理进行自动的合并,其次,使用模拟退火算法对合并结果进行优化,保证最终合并结果趋于全局最优,整个过程无需人工干预。实验结果表明,本文方法显著减少了模型数据载入和绘制批次,有效地提高了三维模型绘制效率。Large quantities of small textures significantly batches of 3D city models; slowing down the rendering method relies on artificial experience which is inefficient. increase the costs of loading and rendering efficiency. The traditional texture merging This paper introduces a multi-texture aut-omatic merging approach based on the greedy and simulated annealing algorithms. Firstly, the greedy algorithm was used to merge the small textures automatically. Secondly, a simulated annealing algo- rithm was used to optimize the merged results in order to ensure that the results converged to the global optimum. The whole process o{ the texture merging is accomplished automatically. Finally, some experiments based on this approach are tested and discussed. Experimental results demonstrate the effectiveness of this approach.

关 键 词：三维模型 纹理合并 贪心算法 退火算法 纹理空间 

分 类 号：P208[天文地球—地图制图学与地理信息工程] TP751[天文地球—测绘科学与技术]