  <A HREF="http://www.cs.cornell.edu/Info/Projects/zeno/rivl/rivl.html">Rivl</A> is a language extension to Tcl/Tk for manipulating images and video sequences. It comes with a set of primitives such as fade, rotate, overlay, etc. The purpose of this project is to extend the set of primitives and use them for creating complex transitional effects between two images or video sequences.    <p>
