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Re: Wiener filter [message #28611 is a reply to message #28539]

Wed, 19 December 2001 13:34

jeyadev
Messages: 78
Registered: February 1995

Member

In article <3C20AC39.2080907@gsfc.nasa.gov>,
James Kuyper Jr. <James.R.Kuyper.1@gsfc.nasa.gov> wrote:
> Surendar Jeyadev wrote:
>
>> In article <9vllbg$po7$1@canopus.cc.umanitoba.ca>,
>> Richard Tyc <richt@sbrc.umanitoba.ca> wrote:
>
> Optimal Wiener filtering of a one-dimensional data set is described in
> section 12.6 of "Numerical Recipes in C", by Preuss et.al. It cites
> three books on signal processing as references. The basic result is that
> if you have a corrupted signal with the fourier spectrum S(f),
> containing noise with a fourier specturm N(f), it can be shown
> rigorously that the optimal (in the sense of a least-squares fit)
> frequency filter for removing the noise is:
>
> |S(f)|^2
> phi(f) = --------------------
> |S(f)|^2 + |N(f)|^2

Eeeks! I did not know the name. I have actually used it is some
data analysis in 1-d (not 2-d images). Thanks!
--

Surendar Jeyadev jeyadev@wrc.xerox.com

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[Message index]

		Wiener filter By: Richard Tyc on Mon, 17 December 2001 12:41
		Re: Wiener filter By: James Kuyper Jr. on Wed, 19 December 2001 13:48
		Re: Wiener filter By: James Kuyper Jr. on Wed, 19 December 2001 13:50
		Re: Wiener filter By: Richard Tyc on Fri, 21 December 2001 10:40
		Re: Wiener filter By: Richard Tyc on Wed, 19 December 2001 12:10
		Re: Wiener filter By: James Kuyper Jr. on Wed, 19 December 2001 07:03
		Re: Wiener filter By: jeyadev on Wed, 19 December 2001 13:34
		Re: Wiener filter By: jeyadev on Tue, 18 December 2001 12:30
		Re: Wiener filter By: James Kuyper Jr. on Fri, 21 December 2001 12:26

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