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Proceedings Paper

Recovery of incorrectly transmitted DWT-coded images
Author(s): Yan Niu; Ashraf Kassim
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Paper Abstract

This paper presents a post-processing error concealment technique for handling transmission of DWT image coefficients. Our technique recovers the lost regularity information as well as irregularity information. First, the Harmonic Function is employed for overall smoothness recovery. Next, in order to enhance local edges, the spatial coherence between DWT subbands is explored. The amplitudes of those detected singular points are then modified, according to the regions they belong to. Our proposed method reveals edges from blurred areas due to smooth recovery accurately.

Paper Details

Date Published: 23 June 2003
PDF: 7 pages
Proc. SPIE 5150, Visual Communications and Image Processing 2003, (23 June 2003); doi: 10.1117/12.502868
Show Author Affiliations
Yan Niu, National Univ. of Singapore (Singapore)
Ashraf Kassim, National Univ. of Singapore (Singapore)

Published in SPIE Proceedings Vol. 5150:
Visual Communications and Image Processing 2003
Touradj Ebrahimi; Thomas Sikora, Editor(s)

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