城市实景模型结构化线面特征重构方法  

Structured Line and Plane Feature Reconstruction Method of Urban Mesh Model

作　　者：梅熙[1] 王义[1] 曲英杰 邓非[2] MEI Xi;WANG Yi;QU Yingjie;DENG Fei(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China;School of Geodesy and Geomatics,Wuhan University,Wuhan 430072,China)

机构地区：[1]中铁二院工程集团有限责任公司,四川成都610031 [2]武汉大学测绘学院,湖北武汉430072

出　　处：《同济大学学报（自然科学版）》2024年第1期130-136,共7页Journal of Tongji University:Natural Science

基　　金：四川省重点研发计划(2019YFG0460)。

摘　　要：为了改善城市实景模型边缘模糊,提出了一种曲率引导的结构化线面特征重构方法。根据曲率特征将网格分割为平面、可展凹、可展凸以及不可展曲面4类,在平面分割结果内提取平面,在可展凹和可展凸分割结果内提取直线,对过度弯曲的不可展区域进行保留,最终形成包含几何特征的复合网格模型。结果表明,结合曲率信息预先设置几何特征的潜在范围,使得结构化线面特征更可靠,同时保证城市实景中复杂的树结构不被错误地提取为平面。To improve blurred edges in the real threedimensional model,a curvature-guided structured line and plane feature reconstruction method was proposed.The meshes were divided into the plane,developable concave,developable convex,and non-developable surface according to curvature characteristics.The plane was extracted from the plane segmentation results,and the straight line was extracted from the developable concave and convex segmentation results.The nondevelopable area was reserved.Finally,a hybrid mesh model containing geometric features was formed.The results show that the potential range of geometric features is preset in combination with the curvature information,which makes the extracted structured line and plane feature more accurate than other methods.Furthermore,the hybrid model ensures that the complex tree structure in the city scene is not mistakenly extracted as a plane.

关 键 词：实景三维模型 三维重建 网格 线特征 面特征 马尔科夫随机场(MRF) 简化 

分 类 号：V221.3[航空宇航科学与技术—飞行器设计]