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Proceedings Paper

Image subband coding with adaptive filter banks
Author(s): John Hakon Husoy; Sven Ole Aase
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Paper Abstract

A fundamental problem with both FIR and IIR based image subband coders operating at low bit rates is the trade-off between ringing noise and blocking artifacts. The important parameter in this respect is the impulse response length of the filter bank channels. A short impulse response length is suitable for modeling image areas with a high degree of detail, but suffers from blocking effects. On the other hand, a long impulse response does not exhibit blocking effects, but will lead to ringing noise in the vicinity of edges. In this paper we show that IIR filter banks based on all pass filter building blocks can be made spatially adaptive without compromising their perfect reconstruction property. This rather surprising property is used to simultaneously minimize ringing artifacts and blocking effects in a subband coder.

Paper Details

Date Published: 1 November 1992
PDF: 10 pages
Proc. SPIE 1818, Visual Communications and Image Processing '92, (1 November 1992); doi: 10.1117/12.131362
Show Author Affiliations
John Hakon Husoy, Rogaland Univ. Center (Norway)
Sven Ole Aase, Norwegian Institute of Technology (Norway)


Published in SPIE Proceedings Vol. 1818:
Visual Communications and Image Processing '92
Petros Maragos, Editor(s)

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