 dimensions as the input image.

<p>You can use <b>pamcomp</b> to place a foreground image over a background
before running <b>ppmshadow</b> on it.  You can use <b>ppmmake</b> to make
the background image (just an image of a solid color).

<A NAME="lbAE">&nbsp;</A>
<H2>OPTIONS</H2>

<DL COMPACT>
<DT><B>-b</B> <I>blur_size</I>

<DD>
Sets the distance of the light source from the image.  Larger values
move the light source closer, casting a more diffuse shadow, while
smaller settings move the light further aw