MATLAB: Help with image manipulation (blur)

blurimage processingImage Processing Toolboximfilterspatial filter

I have the code
 img=imread('x.jpg');  
 img = im2double(img);
 avg3 = ones(3)/9;
 k1 = imfilter(img, avg3,'conv');
 imshow(k1)
I am trying to blur the image using a kernel and convolution but it keeps coming out the same. Any one know how to fix this?

Best Answer

It doesn't come out the same. You either aren't looking at it magnified enough. Or, for tiny displayed images, you'll need to increase the blur window to notice a difference. This code works:
rgbImage = imread('peppers.png');
rgbImage = im2double(rgbImage);
windowSize = 15;
avg3 = ones(windowSize) / windowSize^2;
subplot(2,1,1);
imshow(rgbImage)
blurredImage = imfilter(rgbImage, avg3, 'conv');
subplot(2,1,2);
imshow(blurredImage)
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