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Optical Engineering

Edge enhancement for subband coded images
Author(s): C. Cafforio; Eugenio Di Sciascio; Cataldo Guaragnella
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Paper Abstract

Subband coding is a well-established technique. Coding algorithms, however, rarely try to exploit residual similarities between subbands in order to get both coding gain and improvement in visual appearance. In this work we propose a simple postprocessing technique for edge enhancement and ringing-artifact reduction in subband-coded images. The proposed technique employs morphological filtering for preliminary image simplification and uses a novel dual-window nonlinear operator for subsequent edge enhancement. Visual appearance and numerical results confirm the validity of the approach. A simple coding scheme, designed to test the efficiency of the approach, gives good results.

Paper Details

Date Published: 1 May 2001
PDF: 11 pages
Opt. Eng. 40(5) doi: 10.1117/1.1359208
Published in: Optical Engineering Volume 40, Issue 5
Show Author Affiliations
C. Cafforio, Politecnico di Bari (Italy)
Eugenio Di Sciascio, Politecnico di Bari (Italy)
Cataldo Guaragnella, Politecnico di Bari (Italy)

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