局部区域表面一致性约束的三维模型纹理映射方法  

An Automatic Texture Mapping Method Using Local Surface Consistency Constraint

作　　者：李媛[1] 胡翰[1] 谢金华[2] 朱庆[1,3] 张叶廷[1] 杜志强[1] 彭明军[4] 高山[4] 

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 [2]国家测绘地理信息局卫星测绘应用中心,北京101300 [3]西南交通大学地球科学与环境工程学院,四川成都611756 [4]武汉市国土资源和规划信息中心,湖北武汉430014

出　　处：《武汉大学学报（信息科学版）》2016年第12期1599-1604,共6页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金(41171311);国家科技支撑计划(2012BAH35B02);四川省科技支撑计划(2014SZ0106)~~

摘　　要：倾斜摄影测量进行三维模型重建时,由于影像匹配精度和密集点云简化等因素,使得三角形网格模型表面的法向量存在许多明显噪声,加上镜头畸变和光照条件不同引起的影像间几何与辐射的不一致,最终导致不同三角形之间纹理映射结果不连续,这种碎片状纹理表面的真实感不强,难以直观理解。针对此,提出了一种局部区域表面一致性约束的纹理映射方法,采用区域生长策略将多个三角形合并为一个较大的平面区域,并且在区域生长过程中顾及了区域的连续性和平面性,建立该平面区域与同一影像之间的映射关系。实验证明了该方法能够有效消除纹理映射碎片化的现象。Due to the limitations of the accuracies in dense image matching and the factors of simplification during the three dimensional mesh generation,enormous noises normally occur on the triangular mesh surfaces during object reconstruction procedures.Furthermore,the geometrical and radiant differences between images,together with the noises,cause the textured mesh fragmentation.Aiming to solve this problem,this paper proposes a texture mapping method using a local surface consistency constraint.In this mapping procedure,fragmented triangles are merged into a relative larger surface with region growing,considering continuity and planarity.The regions are treated as a rigid surface and mapped to the same image to relieve the fragmented effect in the textured mesh.Experimental results show that the proposed method is effective and the output has better consistency than industry standard software such as street factory.

关 键 词：倾斜摄影测量 三角形网格模型 区域生长 纹理映射 

分 类 号：P208[天文地球—地图制图学与地理信息工程] P231[天文地球—测绘科学与技术]