r an image.  (This technique is known as
Gaussian blurring).

<i>width</i> and <i>height</i> are the dimensions of the image that
<b>pamgauss</b> generates.  Mathematically speaking, they are the domain
of the two dimensional gaussian function.

<p>The sum of all the samples is equal to the image's maxval (within
rounding error).  This is true even if you clip the Gaussian function
by making the image too small.  If you want to be sure you get a whole
Gaussian function, make sure that you choose a sigma and