Newsgroups: sci.image.processing
From: ricky@drift.demon.co.uk (Rick Turner)
Path: cantaloupe.srv.cs.cmu.edu!das-news2.harvard.edu!news2.near.net!news.mathworks.com!news.alpha.net!uwm.edu!spool.mu.edu!howland.reston.ans.net!pipex!peernews.demon.co.uk!drift.demon.co.uk!ricky
Subject: Re: Speckle Filtering of SAR Imagery
References: <3gcvhs$aa1@deep.rsoft.bc.ca>
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Date: Tue, 31 Jan 1995 19:49:35 +0000
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Simplest speckle reduction filter is a median filter. If you want to
get more specialised than this, you can use either the Lee filter
or a more general version of the Lee called a Weighting filter.
Details of the latter can be found in the International Journal of
Remote Sensing, Vol 14, No 9, pp 1759-1774. Article is called
"SAR speckle reduction by weighted filtering" by FJ Martin and
myself.

If you want to get a commercial package with a whole bunch of speckle
filters in (amongst many other things!) the ER-Radar module of
ER-Mapper R5 contains Frost, Lee and weighting filters, plus several
variants/derivatives of each.

Rick Turner
