一种基于区域封装和像素填充的全景视频映射算法  

A panoramic video mapping algorithm based on region package and padding pixel

作　　者：林畅[1] 李国平[1] 赵海武[1] 王国中[1] Lin Chang;Li Guoping;Zhao Haiwu;Wang Guozhong(School of Communication and Information Engineering,Shanghai University,Shanghai 200444,Chin)

机构地区：[1]上海大学通信与信息工程学院

出　　处：《电子测量技术》2018年第11期108-111,共4页Electronic Measurement Technology

摘　　要：针对全景视频编码效率低的问题,提出一种新的全景视频映射算法。该算法先通过两个环形曲面将球面分割为14个不均匀区域,再通过球面坐标系到平面坐标系的映射得到矩形的平面视频,然后将这14个平面视频重新排列成一个紧凑的全景视频以便于编码,最后,根据视频编码的特点,在全景视频拼接的人为边界附近,通过像素填充的方式,降低鬼影现象。实验结果表明,该算法的客观性能要高于传统的经纬图映射算法,也高于近年来新兴的正多面体映射算法。主观性能上,通过像素填充的方法,在客观性能下降不大的情况下,很好地减少了人为拼接带来的鬼影现象。This paper presents a method of panoramic video mapping based on region package and padding pixel in order to increase the compression of panoramic video.The proposal algorithm firstly divides the spherical surface into 14 nonuniform areas by two toroidal surfaces,and then obtains a rectangular planar video by mapping the spherical coordinate system to the plane coordinate system.The 14 planar videos are then rearranged into a compact panoramic video in order to facilitate coding.Finally,according to the characteristics of video coding,padding pixels near the artificial boundary,to reduce the phenomenon of ghosting.The objective performance of this algorithm is higher than the traditional equirectangular projection and higher than that of the new platonic solid projection.In the subjective performance,with the padding pixels method,solve the problem of ghost while the little loss of objective performance.

关 键 词：视频编码 全景视频 虚拟现实 像素填充 区域封装 

分 类 号：TN919.81[电子电信—通信与信息系统]