Kuwahara filter

Kuwahara edge-preserving filter.

Description

This function implements the Kuwahara 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 = kuwahara(J,5,true);

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

[Chaiwoot Boonyasiriwat]

 

[Davide Bianconi]

Good filter, but very slow.

[Giovanni Motta]

BUG: Output image is misaligned
FIX:
   Line 68
       Y(i,j) = m(k);
   Should be
       Y(i-PADDING,j-PADDING) = m(k);

[Kaj W]

Good but slow