Olympus has something called TruePic that is trademarked that does this.
A link to this is: http://www.olympusamerica.com/cpg_se...nnovations.asp
There are other things that the Olympus does on the same page that are interesting. One thing in particular is the up scaling of a 4 megapixel image to almost 8 megapixel. I compared two images at highest resolutions and there is a definite improvement in the image. It is much like antilazing, it appears to take out the jags at the edges of the 4 mp image.