Help with image manipulation (blur)

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?

Answer 1

[Image Analyst]

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)