VR技术下多投影视频纹理合成方法仿真  

Simulation of Multi Projection Video Texture Synthesis Method Based on VR Technology

作　　者：袁帅[1] 张静[1] YUAN Shuai;ZHANG Jing(Wuhan University of Science and Technology City College,Wuhan Hubei 430000,China)

机构地区：[1]武汉科技大学城市学院,湖北武汉430000

出　　处：《计算机仿真》2021年第4期151-154,163,共5页Computer Simulation

基　　金：武汉科技大学城市学院院级项目(2019CYYBJY020);武汉科技大学城市学院院级项目(2019CYYBKY010)。

摘　　要：为解决纹理合成过程需要消耗大量时空资源的问题,提出一种VR技术下多投影视频纹理合成方法。设计以VR内容制作环节为核心的VR视频处理,经过拼接、投影映射与投影图像帧纹理合成生成一个封装帧,通过服务器显示在客户端。针对VR视频内三维平面或曲面场景,通过屏幕投影将三维场景透视变换投影至二维平面上。赋予二维平面上的三角网格一个连续的缩放因子场,将给定纹理缩放成不同等级,令其与网格上的缩放因子相对应。采用曲面纹理合成方法,利用矢量加平滑方法确定曲面内各三角面片的纹理方向矢量场,根据这些纹理方向合成纹理;依照扫描线顺序搜索样本纹理空间,确定对匹配的纹理坐标,结合缩放因子实现纹理合成。仿真结果表明,上述方法纹理合成用时与对比方法相比下降300%以上,存储空间与对比方法相比节省50%以上。This paper presented a multi-projection video texture synthesis method based on VR technology for reducing the space-time resources in the process of texture synthesis. VR video processing, focusing on VR content production, was designed. After splicing, projection mapping, and projection image frame texture, a new package frame was generated and displayed on the client via the server. For the three-dimensional plane or surface scene in VR video, the perspective of the three-dimensional scene was transformed and projected onto the two-dimensional plane by screen projection. A continuous scaling factor fieldwas given to the triangular grid on the two-dimensional plane, and the given texture was scaled to different levels corresponding to the scaling factor on the grid. The surface texture synthesis method and vector smoothing method were applied to determine the texture direction vector field of each triangle patch in the surface. According to these texture directions, the texture was synthesized. Based on the scan line order, the sample texture space was searched to determine the matching texture coordinates, meanwhile, the scaling factor was utilized to achieve texture synthesis. The results show that compared with the traditional methods, the texture synthesis time of this method is reduced by more than 300%,and the storage space is saved by more than 50%.

关 键 词：VR技术 多投影 视频 纹理合成 缩放因子场 方向矢量场 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]