Efficient image coding with QMF pyramids

E P Simoncelli and E H Adelson

Published in Optical Society of America, Annual Meeting, vol.A4-13 pp. 84, Oct 1987.
Quadrature mirror filters have been widely used in the subband coding of speech signals and have recently been applied to image coding as well [1]. By using cascaded filtering and decimation, we have derived QMF pyramids that are rapidly computed and afford very good data compression. High-pass kernels with even symmetry become possible hen using a staggered sampling grid and can be combined separably for 2-D processing. Nonseparable 2-D kernels with interesting properties have also been derived. The good frequency localization permits data compression that takes advantage of scene statistics and the sensitivity of the human visual system. The good spatial localization of the kernels avoids ringing artifacts. The result is highly efficient coding that gives visually pleasing images.

[1] J. Woods and S. O'Neill, IEEE Trans. Acoust. Speech Signal Process. ASSP-34, 1278 (1986).

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