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Proceedings Paper

Enhancement of decompressed images by optimal shift-invariant wavelet packet basis
Author(s): Dong Wei; Alan Conrad Bovik
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Paper Abstract

A new post-processing method based on wavelet thresholding is proposed to enhance transform coded images. At the encoder, the optimal (in the mean square error sense) shift- invariant wavelet packet basis is searched using a fast optimization algorithm and the location of the best basis in the entire shift-invariant wavelet packet tree is transmitted as overhead information with the bit stream to the decoder. After the decoder reconstructs the decompressed image, the post-processor performs thresholding using the optimal basis. This method can achieve comparable enhancement performance to the method using the undecimated discrete wavelet transform, and requires the same low post-processing complexity as the method using the orthonormal discrete wavelet transform.

Paper Details

Date Published: 13 March 1996
PDF: 12 pages
Proc. SPIE 2669, Still-Image Compression II, (13 March 1996); doi: 10.1117/12.234761
Show Author Affiliations
Dong Wei, Univ. of Texas/Austin (United States)
Alan Conrad Bovik, Univ. of Texas/Austin (United States)

Published in SPIE Proceedings Vol. 2669:
Still-Image Compression II
Robert L. Stevenson; Alexander I. Drukarev; Thomas R. Gardos, Editor(s)

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