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De-noising image data

I have a sequence of pixmap images that are a bit noisy. Anyone have any
suggestions or VIs for denoising them? Currently, I'm doing a FFT, then
a low-pass filter, then an inverse FFT, but it doesn't seem to be working
quite as well as I"d like it.
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Look for image processing sites, usually one can use a 3x3 matrix and
perform a 2D convolution.
If you have matlab then you can just get a sample matrix from there.
I do not have a sample matrix handy, if you really can't find one than email
me.

"Jejo Koola" wrote in message
news:38e92690@newsgroups.ni.com...
>
> I have a sequence of pixmap images that are a bit noisy. Anyone have any
> suggestions or VIs for denoising them? Currently, I'm doing a FFT, then
> a low-pass filter, then an inverse FFT, but it doesn't seem to be working
> quite as well as I"d like it.




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Hallo,

Some time ago I wrote this type of filter vi using a CIN for speed. If I
remember right, there is a 3*3 Median filter and a 3*3 Gaussian -
perhaps more, I don't remember.
So, if interested, give me a word by mail.
--
Pierre Meyer                        
Laboratoire de Physique des Solides     
Bt. 510, Universite de Paris Sud         
F 91405 ORSAY, FRANCE               
T : (33)-(0)1 69 15 60 62
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e-mail : meyer@lps.u-psud.fr
homepage : http://www.lps.u-psud.fr/
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