title: fast blur image with integral image (OpenCV)
body: <p>i like to blurring a image with opencv integral image. I just found a example from here:</p>
  
  <p><a href="http://www.quasimondo.com/IntegralImageForCanvas/IntegralImageBlurDemo.html" rel="nofollow">Fast Blur Image</a></p>
  
  <p>How could i do this with opencv?</p>