Title :
Fast zonal DCT for energy conservation in wireless image sensor networks
Author :
Lecuire, Vincent ; Makkaoui, L. ; Moureaux, Jean-Marie
Author_Institution :
Centre de Rech. en Autom. de Nancy, Univ. de Lorraine, Vandoeuvre-lès-Nancy, France
Abstract :
The problem of energy conservation in wireless image sensor networks is addressed, and a fast zonal discrete consine transform (DCT) design which aims to decrease the complexity of JPEG baseline compression is presented. Energy consumption measurements have been made on a real wireless camera node in order to evaluate the amount of energy which can be saved during the image compression process without loss of visual quality. Although the gain depends on the compression rate, such a DCT design is a simple and effective way to prolong the lifetime of the camera nodes, and thereby the network lifetime.
Keywords :
discrete cosine transforms; energy conservation; energy consumption; image coding; image sensors; wireless sensor networks; DCT; JPEG baseline compression; discrete consine transform; energy conservation; energy consumption measurements; image compression; wireless camera; wireless image sensor networks;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2011.2392