I haven't done anything with this yet. Also discussed in the HTML book. This is the NCSA web driver. I got this only to get their version of imagemap so that we can do active images. This software helps you make an active image map file.
Directory contains executable and HTML documentation.
There is a nice description of how it works in the HTML document. This apparently is capable of manipulating a large number of animation applications. Haven't tried it yet. I tried a couple of times then gave up. Xv is a pretty nice image processing tool.