kurtk@tekcae.CAX.TEK.COM (Kurt Krueger) (07/19/88)
Adding random noise to the signal works good. The noise is used to determine on/off but is NOT used when the error is distributed. Breaks up the worms nicely (but adds grain). Also, if you have several levels of grey to work with the worms become less noticeable. At 10 levels I don't worry about them.