三维场景中建筑物模型简化研究进展  

Research Progress on Simplification of Building Models in 3D Scenes

作　　者：陈博 佘江峰[1] 谈俊忠[1] 马劲松[1] 吴国平[1] CHEN Bo;SHE Jiangfeng;TAN Junzhong;MA Jingsong;WU Guoping(Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology,Key Laboratory for Land Satellite Remote Sensing Applications of Ministry of Natural Resources,School of Geography and Ocean Science,Nanjing University,Nanjing 210023,China)

机构地区：[1]南京大学地理与海洋科学学院,自然资源部国土卫星遥感应用重点实验室,江苏省地理信息技术重点实验室,江苏南京210023

出　　处：《武汉大学学报（信息科学版）》2020年第9期1429-1437,共9页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金(41871293,41371365)。

摘　　要：对三维建筑物模型进行合理的几何简化,可以在保持视觉效果一致性的前提下,降低其结构复杂度,减小数据规模,从而降低图形渲染压力,改善场景交互体验。三维建筑物模型简化是虚拟地理环境的热点问题之一。介绍了三维建筑物模型简化的重难点问题。根据简化方法特点,从面向几何特征的角度将方法分为基于投影特征的简化、符号化表达、结构特征的简化;从多因素约束的角度将方法分为纹理、语义、用户理解及感知约束下的简化。对不同简化方法的优缺点进行了分类归纳。以构建连续细节层次模型为目标,讨论了三维建筑物模型简化研究的发展方向。3 D building models are widely used in geographic information systems,virtual reality,and building information models.Reasonable geometric simplification of the 3 D building model can reduce its structural complexity and data size while maintaining the consistency of visual effects,thereby reducing the pressure of graphics rendering and improving the experience of scene interaction.The simplification of 3 D building model is one of the hot issues in the field of virtual geographic environment.This paper introduces the problems in 3 D building model simplification,analyzes the characteristics of existing simplification methods and classifies them from two perspectives.From the perspective of geometric features,the methods are divided into simplification based on projection features,symbolic expression,and structural features;from the perspective of multi-factor constraints,the methods are divided into simplification under texture constraint,semantic constraint and user’s understanding and perception constraint.The advantages and disadvantages of different simplified methods are discussed and summarized.With the goal of building a continuous level of detail model,the development direction of 3 D building model simplification research is discussed.

关 键 词：三维建筑物 简化 细节层次模型 语义 结构 

分 类 号：P237[天文地球—摄影测量与遥感]