SNN filter

Symmetric nearest neighbor edge-preserving filter.

Description

This function implements the symmetric nearest neighbor filter, a 2D nonlinear filter that reduces noise in an image while at the same time preserving edge content. A code example follows:

RGB = imread('saturn.png');
I = rgb2gray(RGB);
J = imnoise(I,'gaussian',0,0.005);
Y = snn(J,5,true);

• Required Products: Image Processing Toolbox
• MATLAB release: MATLAB 7.0.4 (R14SP2)

[jim grande]

Hi,

I have the following problem with your program, trying the suggested example. I'm looking forward to hearing from you soon.

Best regards,

  Jim

??? Attempted to access X(3,1201); index out of bounds because size(X)=[1500,1200].

Error in ==> snn at 66
        Y(i,j) = mean([NNnearest X(i,j)]);

[nadia ihsan]

AOA.how are you, i have seen your SSN filter but cannot understand it, plz help me,if you have any other noise reduction filter then help me

[Anand Muglikar]

nice but can u give me starting basic codes or link to them for IP using MATLAB? I will be grateful to u...

[Cem]

line 66 - Y(i,j) = mean([NNnearest X(i,j)]); => Y(i,j) = mean([NNnearest Xpad(i,j)]);

[dragon]

 Error in ==> snn at 66
        Y(i,j) = mean([NNnearest X(i,j)]);

solution :
replace X with Xpad ,the size of X is smaller than Xpad.
        Y(i,j) = mean([NNnearest Xpad(i,j)]);