DeArtifact is handy for cleaning up artifacts caused by DV and HD video footage. In fact, it is useful for cleaning up images that have aliased or jaggy edges. When activated, a RGB to YUV conversion takes place so that you can blur only the U and V color channels. Since this is where most of the artifacting shows up, this has the effect of cleaning up the ratty edges encountered when keying DV or HD video footage. It is usually best to blur mostly on the horizontal axis.