A JPEG Image Coding Scheme for Wireless Multimedia Sensor Networks
Zhi Zhong · Chuangan jishu xuebao · 2011
With resource-constrained wireless multimedia sensor networks,image coding and transmission must respect the trade-off among energy consumption,compression ratio and image quality.Compression of video-surveillance image sequences collected by a wireless multimedia sensor network is studied.A low-complexity image compression scheme based on change detection and adapted JPEG is proposed.For adaptation to the limited capacity of store and forward,change detection algorithm is used to locate the region of interest and cut down the data for transmission by only transmitting the region of interest.For adaptation to the limited computational capability,DCT and quantization of JPEG is optimized to reduce the computation complexity.Computation complexity analysis and simulation results indicate that the proposed image compression scheme effectively reduces the data traffic and energy consumption of computation under the required image quality.