Nonlinear Wavelet Processing for Enhancement of Images

J. E. Odegard, M. Lang, H. Guo, R. A. Gopinath, C. S. Burrus
 Department of Electrical and Computer Engineering -- MS366
           Rice University, Houston, TX-77251

		      CML-TR94-04
		       May 1994


		       ABSTRACT


In this note we apply some recent results on nonlinear wavelet
analysis to image processing. In particular we illustrate how the
(soft) thresholding algorithm due to Donoho and Johnstone can
successfully be used to remove speckle in SAR imagery. Furthermore,
we also show that transform coding artifacts, such as blocking in
the JPEG algorithm, can be removed to achieve a perceptually improved
image by post-processing the decompressed image.