using imagemagick to clean up scanned images

I am wondering if anyone has done the following or has input on how
successful this would be:

1.  Use deskew:autocrop or some other routines.  Once concern I have
is that the content may be a small portion of the paper scanned in and
it should autocrop to the content not the paper.

2.  Make the library as small as possible, as this would be linked
into an applet (has anyone ever gotten a core library plus routines
seperated out?)

3.  My intention would be to get a dll file and then integrate using JNI+applet.

All input welcome!!