无线多媒体传感器网络图像通信性能分析  

Performance analysis for image communication in wireless multimedia sensor networks

作　　者：熊哲源[1] 樊晓平[1,2] 刘少强[1] 瞿志华[1,3] 衷路生[4] 

机构地区：[1]中南大学信息科学与工程学院,长沙410075 [2]湖南财政经济学院网络化系统研究所,长沙410205 [3]美国中佛罗里达大学电气与计算机工程系,佛罗里达奥兰多328162450 [4]华东交通大学电气与电子工程学院,南昌330013

出　　处：《计算机工程与应用》2012年第14期27-32,共6页Computer Engineering and Applications

基　　金：国家自然科学基金(No.60870010;No.60776834;No.60904049)

摘　　要：对无线视频传感器节点的图像通信活动进行研究,分析了其在资源受限的无线多媒体传感器网络中进行图像编码和传输的性能。对基于DCT和DWT的图像编码与传输的能量消耗和率失真进行建模分析。根据所建立的能量消耗与率失真模型,对有限的能量和传输带宽进行优化分配。根据监测场景的统计信息,调整编码中所使用的参数,以使得能量消耗最小化。仿真实验结果表明,所提出的方法在保证应用所需图像质量的情况,有效地降低了无线传感器节点的数据通信量和计算过程的能耗。The objective of this paper is to study the image communication behavior of a wireless video sensor,and analyze its performance under resource constrained wireless multimedia sensor networks.Energy consumption and rate distortion model of DCT and DWT based image compression and transmission is developed.Based on energy consumption and rate distortion model proposed,resource allocation is optimized with limited energy and bandwidth.Encoding coefficients are adapted according to the activity of monitoring scene,and then the energy consumption is minimized.Simulation results are conducted to show the performance of the work.The proposed scheme dramatically reduces image compression and transmission energy consumption under expected image distortion and transmission rate.

关 键 词：无线多媒体传感器网络 图像压缩 图像传输 离散余弦变换(DCT) 离散小波变换(DWT) 

分 类 号：TN911.21[电子电信—通信与信息系统]