g-force said:
it's actually a combination of a temporal smoother and median filter (like clense). If I had to guess, from what I remember, it's probably:
median(current frame, average of about 12 previous frames, median(current, previous,next))
Median filters are non-linear, and cannot be undone.
-G
Yuck :-(
Simple frame-blending can be undone, but if what you say is true, then it's screwed.