(with each pixel being within 5% of its expected value) the image that would be generated by applying to the shadow a Gaussian blur with a standard deviation equal to half the blur radius" />
  <style type="text/css">
    div.stripecontainer {
      width: 600px;
      height: 30px;
      border: medium solid blue;
    }
    div.refimage, div.blurcontainer {
      width: 600px;
      height: 10px;
    }
    div.refimage img {
      display: block;
    }
    div.blurcontainer { position: relative; overflow: 