Abstract:

The recently developed JPEG 2000 standard, which incorporates wavelet at the core of its compression technique, provides many excellent features compared to other presently available image compression standards. But in the case of mobile networks, decoding a large JPEG 2000 image at a time at the end port will result in bigger memory and circuit requirements and consequently higher price for the end port. Algorithms have been proposed in the past to divide an image to smaller units like tiles or streams in an intermediate gateway computer, and then send them sequentially to the end port. In this way the end port can do the decoding one unit at a time requiring less resource. But the image division process itself that runs in the gateway is calculation and memory intensive. So the need to process a large number of images in such a mobile network can lay a severe burden on the gateway. In this paper we discuss two different approaches for reducing the resource requirements in dividing a 2D DWT (Discrete Wavelet Transform) image data into smaller tiles. An extensive evaluation of resource efficiency and derived image quality with the two approaches has been done.

Keywords: Wavelet transform, JPEG 2000 standard, mobile network, image division, intermediate gateway.

Biographies:

Sadeque Mohammad Hanif received the Associate of Engineering degree in Electronics and Information Engineering from Fukui National College of Technology, Japan, in 2001. He received the B.E and M.E degrees from the department of Computer Science at The University of Electro-Communications, Tokyo, Japan, in 2003 and 2005, respectively. He is currently persuing.his Ph.D. degree at the same university. His research interests include.image processing, wavelets, computer architecture and mobile network.

Koki Abe received the B.E. and M.E. degrees from Yokohama National University, Japan, in 1969 and 1971, respectively, and the Ph.D. degree from the University of Tokyo, Japan, in 1976. Since 1974 he has been with the University of Electro-Communications, Tokyo, Japan, where he is currently an associate professor of the Department of Computer Science. From 1980 to 1982, he was a visiting researcher at Carnegie-Mellon University, PA. USA. His current teaching/research interests include computer architecture, VLSI design, computer networking, cryptosystems, and wavelet applications. Dr. Abe is a member of the IEEE Computer Society, the Information Processing Society of Japan, the Institute of Electronics, Information and Communication Engineers, and the Institute of Electrical Engineers of Japan.