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Proceedings Paper

New folding operators for image compression
Author(s): Bjorn D. Jawerth; Yi Liu; Wim Sweldens
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Paper Abstract

We discuss bases formed by smooth local trigonometric functions and their applications to image compression. It is known that these bases can reduce the blocking effect that occurs in JPEG. We present and compare two generalizations of the original construction of Coifman and Meyer: biorthogonal and equal parity folding. They have the advantage that constant and linear components can be represented efficiently. We show how they reduce the blocking effect and improve the mean square error.

Paper Details

Date Published: 15 March 1994
PDF: 12 pages
Proc. SPIE 2242, Wavelet Applications, (15 March 1994); doi: 10.1117/12.170024
Show Author Affiliations
Bjorn D. Jawerth, Univ. of South Carolina (United States)
Yi Liu, Univ. of South Carolina (United States)
Wim Sweldens, Univ. of South Carolina (United States)
Katholieke Univ. Leuven (Belgium)

Published in SPIE Proceedings Vol. 2242:
Wavelet Applications
Harold H. Szu, Editor(s)

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