时空一致的动态纹理地图快速生成  

Fast Generation of Spatiotemporal-Consistent Dynamic Atlas

作　　者：洪阳 吴康 李威 胡伟[2] 刘利刚[1] Hong Yang;Wu Kang;Li Wei;Hu Wei;Liu Ligang(School of Mathematical Sciences,University of Science and Technology of China,Hefei 230026;HuaWei Technologies Co,Ltd,Beijing 100085)

机构地区：[1]中国科学技术大学数学科学学院,合肥230026 [2]华为技术有限公司,北京100085

出　　处：《计算机辅助设计与图形学学报》2020年第5期709-720,共12页Journal of Computer-Aided Design & Computer Graphics

基　　金：国家自然科学基金(61672482)。

摘　　要：为了获得真实的动态重建体验,需要在重建几何的基础上进一步重建颜色信息,并高效地进行数据编码传输.为此提出一种面向动态三维重建的纹理地图序列快速生成方法.首先基于动态三维重建的基准网格序列的几何相似特性快速生成相邻帧网格的三角面对应关系,然后根据该对应关系使用一种基于网格块的优化方法得到网格序列的一致性分割结果,最后结合网格序列的一致性分割结果及网格前后帧的三角面对应关系,快速生成具有时空一致性的纹理地图序列.实验结果表明,在真实动态重建场景下,使用H.264对由该方法生成的一致性纹理地图序列进行无损视频编码时可以降低约50%的比特率,使用有损编码可以降低70%~80%的比特率.In order to transmit dynamic 3D reconstruction results,it is demanded to efficiently encode 3D models with realistic and compact texture information.In this paper,a method is proposed to fast generate spatiotemporal-consistent texture atlas for dynamic 3D reconstruction.First,the triangle-wise correspondence of adjacent meshes is quickly calculated as adjacent canonical meshes from dynamic reconstruction have similar geometric shape.Second,a consistent segmentation of sequence of meshes is obtained by solving a mesh-patch-based optimization.Third,the correspondence and segmentation of sequence of meshes are used for fast generating spatiotemporal-consistent atlas of meshes.Experimental results have shown that our method enables efficient dynamic 3D reconstruction with compact texture atlas video.The bitrate of atlas video lossless encoded by H.264 is reduced by about 50%and the bitrate of atlas video lossy encoded by H.264 is reduced by 70%~80%.

关 键 词：动态三维重建 时空一致的纹理地图 纹理网格序列传输 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]