Demonstration of pnmpastelfilter<BR> This filter is meant to simulate the
effect of the lens filter with the same name.  It has a softening effect, and
causes glows around highlights.  I think Playboy uses these filters a lot.

<P>

<img src="nopastel.jpg">
<img src="pastel-default.jpg">
<BR>Left: original picture. Right:
pnmpastelfilter (default settings)<BR>