Exploring image frequency domain to reduce energy consumption in MWSN

摘要

Transferring a multimedia content such as videos and images over a wireless sensor network represents an open subject of research. It can be treated in different ways. For instance, we can send images through the network without compression using spatial domain or using frequency domain for compression. In this paper we used the DCT compression which uses the frequency domain. Also, we can use routing protocols, such GPSR, which respect multi-media constraints. Actually, the aim of our work is to test the effect of image compression on energy consumption and the quantity of the received images by the sink For this purpose, we used an implemented GPSR protocol as routing protocol, and omnet++/castalia as a simulator. In fact, we used two applications in this simulation. The first one sends images without compression, and the second application sends images using DCT compression. As a result DCT compression saves energy more that the first application.