一种基于多通道视频同步采集的多投影环幕显示系统  

A MULTI-PROJECTOR CYLINDERICAL DISPLAY SYSTEM BASED ON SYNCHRONIZED MULTI-CHANNEL VIDEO CAPTURE

作　　者：程梦龙 姜忠鼎[2] Cheng Menglong;Jiang Zhongding(Shanghai Key Laboratory of Data Science,Fudan University,Shanghai 201203,China;Software School,Fudan University,Shanghai 201203,China)

机构地区：[1]复旦大学上海市数据科学重点实验室,上海201203 [2]复旦大学软件学院,上海201203

出　　处：《计算机应用与软件》2020年第10期125-132,150,共9页Computer Applications and Software

基　　金：国家自然科学基金项目(60803064)。

摘　　要：传统环幕系统的画面源与显示环境耦合度较高,不具有很好的通用性与可复用性。针对这种情况,提出一种基于多通道视频同步采集的多投影环幕系统。使用视频采集卡多通道同步采集画面源画面,将画面数据压缩,通过网络传输给集群多投影环幕显示模块。集群主节点接收画面源数据,使用可靠多播协议传输画面数据至集群显示节点。显示节点对数据进行解码显示,对显示画面进行变形与矫正,通过多台投影机呈现在环幕显示表面。实验结果表明,在画面源配置不变的情境下,该系统能够实现画面源在不同多投影环幕环境中显示,并且画面延迟较低。The traditional cylinderical display system has a high degree of coupling between the screen source and the display environment,and does not have good reusability.For this case,a cylinderical display system based on synchronized multi-channel video capture is proposed.The system used the video capture card to collect the picture source synchronously in multiple channels,compressed the picture source,and transmitted it to the cluster display module through the network.After receiving the picture source data,the master node of display cluster transmitted the picture source data to the display nodes of cluster by using a reliable multicast protocol.The display nodes decoded the data,and then warped and blended the texture images within the viewing angle and presented the resultant images on the surface using multiple projectors.The experimental results show that under the situation that the picture source configuration is unchanged,the system can realize the operation of the picture source in different types of cylinderical screens,and the delay from video capture to image display is low.

关 键 词：多通道视频采集 环幕 虚拟现实 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]