age: dilation and erosion.
     
<DT><B><a href="pgmminkowski.html">pgmminkowski</a></b>
<DD>Compute Minkowski integral over a PGM image</DD>

<DT><B><a href="pamedge.html">pamedge</a>       </B>
<DD>edge-detect (outline) an image

<DT><B><a href="pammasksharpen.html">pammasksharpen</a>       </B>
<DD>sharpen an image via an unsharp mask

<DT><B><a href="rgb3toppm.html">rgb3toppm</a>     </B>
<DD>combine three PGMs into one PPM

<DT><B><a href="ppmtorgb3.html">ppmtorgb3</a>     </B>
<DD>separate a PPM into 