This page
http://www.brucelindbloom.com/index.html?LabGamutDisplayHelp.html
Talks about generating "pulses" to determine the shape extents. It
doesn't really explain very well what the "pulses" are and what to do
with them.
Here is a collection of demos
http://www.brucelindbloom.com/index.html?LabGamutDisplayHelp.html
Mike
