1 May 2001 Edge enhancement for subband coded images
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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.
C. Cafforio, Eugenio Di Sciascio, Cataldo Guaragnella, "Edge enhancement for subband coded images," Optical Engineering 40(5), (1 May 2001). https://doi.org/10.1117/1.1359208

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