基于四拼图的嵌入式全景视频实时生成系统  

Embedded Real-time Panoramic Video Generation System Based on Four-Channel Mosaic

作　　者：陈立栋[1] 徐玮[1] 张茂军[1] 熊志辉[1] 马力[2] 

机构地区：[1]国防科技大学信息系统与管理学院,湖南长沙410073 [2]海军舟山保障基地司令部,浙江舟山316000

出　　处：《信号处理》2009年第12期1946-1950,共5页Journal of Signal Processing

基　　金：国家自然科学基金(No.60773023;No.60705013);湖南省自然科学基金(No.08JJ5027)

摘　　要：为实现360度全方向视频监控,本文设计了一个正四棱台形视频采集固定装置,对四个广角摄像头采集的局部视频进行实时的畸变校正、柱面投影变换和全景拼接来生成全景视频。系统以TMS320DM642为开发平台,基于查找表技术提出了一种"分块预取"策略,并针对DSP的并行和流水特点,采用双缓冲数据访问机制、高并行度算法设计等,实时生成130万象素的柱面全景视频,帧速率达36fps。In order to realize panoramic surveillance covering 360 degree field of view, a video capturing equipment fixed on quadrangular frustum is designed. The videos captured from four wide-angle cameras are corrected, projection transformed, and stitched to a cylindrical panoramic video in real time. The proposed system based on TMS320DM642 can produce a high-resolution panoramic video （ 1.3M pixels） at 36fps, by using double-buffer mechanism for data access and pipeline design of high parallel assemble program. Notably, a novel strategy of ＂block prefetch＂ based on look-up tables is proposed.

关 键 词：四路视频拼接 柱面全景视频 分块预取 双缓冲 流水线 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]