实景三维模型孔洞区域的网格重构算法  

A mesh reconstruction algorithm for hole area in 3Dreal scene model

作　　者：贾军辉 黄明 付昕乐 陈凯 杨涛 龚建辉 JIA Junhui;HUANG Ming;FU Xinle;CHEN Kai;YANG Tao;GONG Jianhui(The Third Institute of Photogrammetry and Remote Sensing,Ministry of Natural Resources,Chengdu 610100,China;School of Geomatics and Urban Spatial Information,Beijing University of Civil Engineering and Architecture,Beijing100044,China)

机构地区：[1]自然资源部第三航测遥感院,成都610100 [2]北京建筑大学测绘与城市空间信息学院,北京100044

出　　处：《测绘科学》2023年第7期116-122,共7页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(42171416);四川省科技计划项目(2022YFS0449);四川省自然资源科研项目(Kj-2022-(3));四川省测绘局新型基础测绘技术研究计划项目(2022KJ001)。

摘　　要：针对无人机倾斜摄影技术生产的实景三维模型数据中存在孔洞区域的问题,该文提出一种能够修复常规孔洞和无网格边界孔洞的网格重构算法,通过峰值线检测、插值特征点以及曲面重建技术修补常规孔洞,而对于无网格边界孔洞则利用三维凸包构建、三角面探测和网格缝合技术来修补。该算法能够快速、准确的修补孔洞区域,保证模型的网格体拥有正确的拓扑结构并符合常规数据生产需求。实际生产数据的修复结果表明,该算法修复的网格模型在进行纹理映射后能够准确并美观地表达地物特征信息,修复过程也很大程度上简化了人工操作,进而提高了实景三维模型生产效率。Aiming at the problem of hole area in 3Dreal scene model data produced by UAV oblique photography technology,the paper proposes a mesh reconstruction algorithm that can repair conventional holes and meshless boundary holes.The conventional hole is repaired by crest line detection,interpolation feature points and surface reconstruction techniques,while the meshless boundary hole are repaired by 3D convex hull construction,triangular surface detection and mesh stitching technology.The algorithm can repair the hole area quickly and accurately,and ensure that the mesh of the model has the correct topological structure and meets the requirements of conventional data production.The repair results of actual production data show that the mesh model repaired by this algorithm can accurately and aesthetically express geographical characteristics information after texture mapping,and the repair process also greatly simplifies manual operation,further improving the production efficiency of 3Dreal scene model.

关 键 词：倾斜摄影技术 实景三维模型 孔洞修补 网格重构 

分 类 号：P237[天文地球—摄影测量与遥感]