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   -> Volume 3, Issue 8


Answer: Edge effects and reconstruction in DWT (WD 3.7 #9 and WD 3.4 #14)
 
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jfs@SYBIL.risc.rockwell.com
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PostPosted: Mon Dec 02, 2002 1:06 pm    
Subject: Answer: Edge effects and reconstruction in DWT (WD 3.7 #9 and WD 3.4 #14)
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Answer: Edge effects and reconstruction in DWT (WD 3.7 #9 and WD 3.4 #14)

Reply to WD 3.7 topic#9 and WD 3.4 topic# 14:

The answers to both your questions can be obtained by sending an e-mail
message to Neil Getz at Berkeley (WD 2.1 topic#2) at getz@robotics.Berkeley.EDU
and requesting a copy of his technical memorandum M92/138 titled: A Fast
Discrete Periodic Wavelet Transform." I know from personal experience using
the DPWT and modifications of it that this is the answer to your problems.
This is a well written document which is highly recommended.

Also: check out the following references on edge effects and subband coding:

1) G. Karlsson and M. Vetterli: "Extension of finite length signals for
sub-band coding," Signal Processing vol.17, pp.161-168 (1989)

2) M. J. T. Smith and S. L. Eddins: "Analysis/Synthesis Techniques for
Subband Image Coding," IEEE Trans. Acoustics, Speech, Signal Process.
vol38, No. 8, pp. 1446-1456 (1990)

3) S. A. Martucci, "Signal extension and noncausal filtering for subband
coding of images," SPIE proceedings, Vol 1605, pp. 137-148 (1991)

Hope this helps!

Jim Scholl
Mathematical Physics Department
Rockwell Science Center 1049 Camino Dos Rios Thousand Oaks, CA 91360
All times are GMT + 1 Hour
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