Image subband coding with adaptive filter banks

John Hakon Husoy; Sven Ole Aase

doi:10.1117/12.131362

1 November 1992 Image subband coding with adaptive filter banks

John Hakon Husoy, Sven Ole Aase

Proceedings Volume 1818, Visual Communications and Image Processing '92; (1992) https://doi.org/10.1117/12.131362
Event: Applications in Optical Science and Engineering, 1992, Boston, MA, United States

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.

Citation Download Citation

John Hakon Husoy and Sven Ole Aase "Image subband coding with adaptive filter banks", Proc. SPIE 1818, Visual Communications and Image Processing '92, (1 November 1992); https://doi.org/10.1117/12.131362

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