一种适用于无线传感网图像节点单元的彩色图像压缩方法  

A Color Image Compression Method for Image Sensor Nodes of Wireless Sensor Network

作　　者：罗军[1] 谢翔[2] 曾浩[1] 袁延艺[1] 

机构地区：[1]海军装备研究院,北京100073 [2]海军通信应用研究所,北京100841

出　　处：《电讯技术》2007年第1期100-103,共4页Telecommunication Engineering

摘　　要：针对无线传感器网络节点单元的特点,提出了一种适合这种节点单元的高效、低复杂度彩色有损压缩方法,对从图像传感器采集的原始BAYER彩色阵列图像数据进行低通滤波与降采样后,再把数据从RGB空间转换到YCbCr空间,最后利用JPEG算法对该数据进行压缩。试验结果表明该压缩方法与常规先插值后压缩方法以及类似先压缩后插值的压缩方法相比,在低码率条件下有更高的压缩性能和更低的实现复杂度。According to the characteristics of the image sensor nodes of wireless sensor networks, this paper proposes a low complexity and high efficiency method of the lossy color image compression suitable for such nodes. In this method, an improved compression and decompression structure is presented, and the captured CFA raw data is firstly low - pass filtered in RGB space by a smooth filter followed by the down - sampling operation. Then, the data are transformed from RGB space to YCbCr space, Lastly, the filtered data in YCbCr are compressed directly before full color interpolation that introduces redundancy. The presented method can provide lower compression ratio （bit/pixel） and lower complexity than conventional interpolation -first image compression methods and other existing similar compression -first methods.

关 键 词：无线传感器网络 图像节点单元 图像压缩 BAYER彩色图像阵列 

分 类 号：TN919.8[电子电信—通信与信息系统]