Sliding a 3X3 window over an image

I am using kriging interpolation algorithm for the removal of high density salt and pepper noise in images.

For this I am using window of different size to slide over an image for uncorrupted image pixels. Initially I created a 3X3 window using

ones(3,3)

I am unable to convolve this 3X3 window to a image('cameraman.tif')

Please provide matlab code for this.

Answer 1

[KSSV]

A = conv2(A,ones(3),'same');