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   -> Volume 7, Issue 5


Preprint: Fast Adaptive Wavelet Packet Image Compression
 
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"Francois G. Meyer" (meyer-francois@cs.yale.edu)
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PostPosted: Tue Apr 21, 1998 6:33 pm    
Subject: Preprint: Fast Adaptive Wavelet Packet Image Compression
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#5 Preprint: Fast Adaptive Wavelet Packet Image Compression

Title: Fast Adaptive Wavelet Packet Image Compression

Author: Francois G. Meyer, Amir Z. Averbuch, Jan-Olov Stromberg

Available: noodle.med.yale.edu/~meyer/profile.html
- postscript file of the preprint
- postscript file of the figures
- software

Abstract: In this paper we address the problem of efficiently encoding
textured images. We propose a fast wavelet packet compression
algorithm. The wavelet packet expansion exploits factorized
non-separable very fast filters, and is faster by a factor of 4 than a
regular convolution and decimation of the image with separable
one-dimensional filters. The selection of the best basis does not
require any iterative procedure. This algorithm provides a very
efficient implementation of the best basis algorithm. The wavelet
packet coefficients are organized by increasing frequency into
sequences of rapidly decreasing coefficients. The coefficients are
quantized with uniform quantization, and bitplane encoded. The
evaluation of the algorithm was performed on a large class of textured
images. The results indicate that this new fast wavelet packet coder
is competitive to, and often outperforms the best wavelet coding
algorithms, both visually and in term of the quadratic error.

An implementation of the algorithm is available on the web site.

Francois G. Meyer francois.meyer@yale.edu

Yale University School of Medicine, tel:(203) 737 6037
Department of Diagnostic Radiology (203) 785 2427
333 Cedar Street, P.O. Box 208042 fax:(203) 737 4273
New Haven, CT 06520-8042, USA

http://noodle.med.yale.edu/~meyer/profile.html
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