title: How do I gaussian blur an image without using any in-built gaussian functions?
body: <p>I want to blur my image using the native Gaussian blur formula. I read <a href="http://en.wikipedia.org/wiki/Gaussian_blur" rel="noreferrer">the Wikipedia article</a>, but I am not sure how to implement this.</p>
  
  <p>How do I use the formula to decide weights?</p>
  
  <p>I do not want to use any built in functions like what MATLAB has</p>