摘要
在保证传输图像质量的前提下最小化能量消耗,是基于无线传感器网络(WSN)的视频监视系统设计中的一个关键问题。本文针对WSN结构特点,提出了一种分布式视频压缩算法。该算法基于Motion JPEG2000的分片编码方式,定义了两个参数来判定视频序列中一帧图像区域的重要性大小,一个是片的复杂度,另一个是片的运动程度。从而以低复杂度算法实现了自适应的码率分配。文中基于此算法提出WSN构建方案。仿真实验结果表明,本文提出的分布式视频压缩方案,能有效减小WSN中数据传输能量消耗,同时得到较好的图像重建效果。
To minimize the energy consumption without violating image quality is a key problem con- cerned in a video-surveillance system design based on wireless sensor network （WSN）. Aiming at the WSN architecture feature, we proposed a new distributed video compression algorithm. Based on tile encoding of Motion JPEG2000, the two parameters, the complexity and the motion activity of a tile, are defined by the algorithm to discern the important regions. Thus an adaptive rate-allocation is real- ized in a lower complexity algorithm. A WSN architecture scheme was given by the proposed algo- rithm. Simulation results show that the proposed scheme can effectively reduce data transmission ener- gy consumption and meanwhile leads to a satisfactory image quality.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2007年第10期1267-1271,共5页
Acta Armamentarii
