We have studied two specific issues related to image compression, i.e.., region-of-interest (ROI) coding and image post-processing.  Specifically, we proposed a new JPEG2000 compliant ROI coding method that is called Partial Significant Bit-plane shift (PSBShift). We also investigated how to improve image quality both subjectively and objectively by effective post-processing.

ROI coding example of the Barbara image.

Related Publications

• L. Liu and G. Fan, “A New JPEG2000 Compliant Region-of-Interest Image Coding Method: Partial Significant Bitplanes Shift”, IEEE Signal Processing Letters, Vol. 10, No. 2, pp35-38, Feb. 2003.

• G. Fan and W. K. Cham, “Post-processing of Low Bit-rate Wavelet-based Image Coding Using Multiscale Edge Characterization,” IEEE Trans. on Circuits and Systems for Video Technology, Vol. 11, No. 12, pp1263 -1272, Dec. 2001.

• G. Fan and W. K. Cham, “Model-Based Edge Reconstruction for Low Bit-rate Wavelet Compressed Images,” IEEE Trans. on Circuits and Systems for Video Tech., Vol. 10, No. 1, 2000, pp120-132.

• G. L. Fan and W. K. Cham, "Post-processing for Low Bit-rate Wavelet-based Image Coding Using Multiscale Edge Characterization", in Proc. of the IEEE Data Compression Conference (DCC98), Snowbird, UT, 1998, p545.

• G. L. Fan, W. K. Cham and J. Z. Liu, "Model-Based Edge Reconstruction for Low Bit-rate Wavelet Image Coding", in Proc. of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP98), Seattle, WA, 1998, p2561-2564.

• G. L. Fan and W. K. Cham, "Multiscale Image Reconstruction for Low Bit-Rate Wavelet Image Coding", in Proc. of the 1998 IEEE International Conference on Image Processing (ICIP98), Chicago, IL, Oct. 1998, p420-424.

• G. Fan and L. Zhou, "Visual Entropy -based Classified Bath Fractal Transform for Image Coding", in Proc. of the IEEE International Conference on Signal Processing (ICSP1996), Oct., 1996, Beijing, China.