title: How can i add a Gaussian, salt pepper and skettle noise for an image of 256X256 using sliding window of length 8X8
body: <p>I have looked in to your forum for many clarifications and hope I get this also clarified.
  My issue is about writing a code to add a Gaussian/speckle/salt pepper noise to an image and calculate a MSE and Quality Index of it. I want to create this using a sliding window technique. </p>