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.
出处
《信号处理》
CSCD
北大核心
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)
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
four-channel video mosaic
cylindrical panoramic video
block prefeteh
double buffer
pipeline technique
