EURASIP Journal on Applied Signal Processing 
Volume 2006 (2006), Article ID 10968, 15 pages
doi:10.1155/ASP/2006/10968

A Complete Image Compression Scheme Based on Overlapped Block Transform with Post-Processing

C. Kwan,1 B. Li,2 R. Xu,1 X. Li,1 T. Tran,3 and T. Nguyen4

 1Intelligent Automation, Inc. (IAI), 15400 Calhoun Drive, Suite 400, Rockville 20855, MD, USA
2Department of Computer Science and Engineering, Ira. A. Fulton School of Engineering, Arizona State University, P. O. Box 878809, Tempe 85287-8809, AZ, USA
3Department of Electrical and Computer Engineering, The Whiting School of Engineering, The Johns Hopkins University, Baltimore 21218, MD, USA
4Department of Electrical and Computer Engineering, Jacobs School of Engineering, University of California, San Diego, La Jolla 92093-0407, CA, USA
Received 29 April 2005; Revised 19 December 2005; Accepted 21 January 2006

Recommended by Dimitrios Tzovaras

Abstract

A complete system was built for high-performance image compression based on overlapped block transform. Extensive simulations and comparative studies were carried out for still image compression including benchmark images (Lena and Barbara), synthetic aperture radar (SAR) images, and color images. We have achieved consistently better results than three commercial products in the market (a Summus wavelet codec, a baseline JPEG codec, and a JPEG-2000 codec) for most images that we used in this study. Included in the system are two post-processing techniques based on morphological and median filters for enhancing the perceptual quality of the reconstructed images. The proposed system also supports the enhancement of a small region of interest within an image, which is of interest in various applications such as target recognition and medical diagnosis