Re: Octave Image Processing Question.

[etienne]

Quoting Diyar Saraço?lu <address@hidden> (Thu, 19 Nov
2009 22:30:43 +0200):

  Hi Diyar,

I can help a little w/ your 2nd question, but since I use an old  
octave, ymmv w/ the latest version.

### As you see, this octave is not brand new
version

   ans = 3.0.3

which medfilt2

   medfilt2 is the user-defined function from the file
/home/etienne/prog/octave/svn-octave-forge/octave-forge/main/image-1.0.8/inst/medfilt2.m

### Now with the filter, which seems to work

[xx,yy] = meshgrid (1:100); zz = sin(xx/8.*yy/16+xx/12+yy/20); zzn =  
zz + randn (size (zz)) .* 0.3; zzf = medfilt2 (zzn,ones(8,8),"ones");  
imshow (([zzn, fliplr(zzf)]-min([zzn, fliplr(zzf)](:)))/4)

[xx,yy] = meshgrid (1:100); zz = sin(xx/8.*yy/16+xx/12+yy/20); zzn =  
zz + randn (size (zz)) .* 0.3; zzf = medfilt2 (zzn,ones(8,8)); imshow  
(([zzn, fliplr(zzf)]-min([zzn, fliplr(zzf)](:)))/4)

  Hth,

  Etienne

> Hi ,
>
> I am new at octave. I am using Image package for image processing.
>
> I have 3 question.
>
> 1) Is there a "Wiener" filter at Octave?
>
> 2) In medfilt2 filter. It is written that MEDFILT2(A, [domain,
> padding]) is format. In this format i could not give second and
> third parameter. What is domain and padding.
>
> 3) Is there any octave examples, specially in image processing. I
> could not find in internet.
>
> Thank you for your help.
>
> diyar
>
> --
> "Forse Altri Contera Con Miglior Plettero"

--
http://www.isr.ist.utl.pt/~etienne

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