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Lee filter

3.3 | 3 ratings Rate this file 24 Downloads (last 30 days) File Size: 1.3 KB File ID: #28046 Version: 1.0

Lee filter



Lee filter for reducing speckle noise in images

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Lee filter for reducing speckle noise in images. Vectorised version of

Required Products Image Processing Toolbox
MATLAB release MATLAB 7.9 (R2009b)
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Comments and Ratings (4)
19 Oct 2011 Qiao Liyong

thank you!

10 Oct 2010 priyanka reddy

not that much useful

01 Jul 2010 Cris Luengo

Cris Luengo (view profile)

I know you just vectorized someone else's code, but you should at least check that code to see if it's useful before reposting it. If you fill out the definition of 'ENLs' into that of 'sx2s' you'll find that 'sx2s' == 0, and if you look at the pixel values for 'sx2s' you'll see that this is true (up to numerical accuracy). Thus, 'fbar' = 'means', you're outputting the result of a mean filter! I'm sure that this is not what a Lee filter is supposed to to.

29 Jun 2010 Bjorn Gustavsson

In the image processing toolbox there is a mathworks supplied function wiener2.m that implements the Lee filter. Since a requirement for using this function is the image processing toolbox I fail to see any utility of this function, when one would already have the image processing toolbox with the Lee-filter if one can run this function. Further that function for example lets me choose the size of the neighbourhood to use for filtering, something this function has hard-coded.

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