Professional Activities and Research Summary

Professional Activities:

Publications Chair, 2001 NSIP Conference; General Conference Chair, ARL/ATIRP Annual Conference, Jan. 1998; Member, IEEE Signal Processing Society Publications Board, 1997-2000; CD-ROM Publications Chair, 1995 IEEE International Conference on Image Processing, Washington DC, Oct. 1995; Conference Co-Chair, 1991 and 1992 SPIE Conferences on Nonlinear Image Processing, San Jose, CA; Consultant: Princeton University, 1987, 1990, Alcoa Corporation, 1991; Member, NSF Panel on Instrumentation, Sensing, and Measurement, 1987.

Reviewer for many journals and textbooks, including the IEEE Transactions on Signal Processing, Information Theory, Image Processing, Automatic Control, and Signal Processing Letters.

Member of IEEE, SIAM, the Delaware Academy of Science, Eta Kappa Nu, and Tau Beta Pi.

Research Summary:

Current Interests include nonlinear filtering, image processing, computer networking, data compression, multimedia, and digital watermarking and steganography.

Research highlights include the following: several techniques for image steganography and tamperproofing, block arithmetic coding (BAC) for entropy coding, new bilevel image compression methods, quadtree methods for lossless and lossy image compression, several families of nonlinear filters including the Ll-filters and the LUM filters, fast algorithms for doing order statistic computations, a robust version of the Kalman filter, and combinatorial algorithms for robust estimation.