Adaptive wavelet packet basis selection for zerotree image coding

Authors:
N. M. Rajpoot;R. G. Wilson;F. G. Meyer;R. R. Coifman
Affiliations:
Dept. of Comput. Sci., Univ. of Warwick, Coventry, UK;-;-;-
Venue:
IEEE Transactions on Image Processing
Year:
2003

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Abstract

Image coding methods based on adaptive wavelet transforms and those employing zerotree quantization have been shown to be successful. We present a general zerotree structure for an arbitrary wavelet packet geometry in an image coding framework. A fast basis selection algorithm is developed; it uses a Markov chain based cost estimate of encoding the image using this structure. As a result, our adaptive wavelet zerotree image coder has a relatively low computational complexity, performs comparably to state-of-the-art image coders, and is capable of progressively encoding images.