jrista said:I think that would only be the case if you were trying to remove blur. In my experience, removal of banding noise in RAW is more effective than removing it in post. That may simply be because of the nature of banding noise, which is non-image information. I would presume that bayer interpolation performed AFTER banding noise removal would produce a better image as a result, no?
Yes, of course. One exception I didn't mention, since we were only (or I thought we were only) discussing sharpening right now.
Banding has a weight effect on R vs B chroma/luminance mix in the interpolation stage. It also overstates the influence of the slightly stronger columns (mostly column errors in Canon cameras) on the total. This means that weak contrast horizontal lines in the (ideal) image gets less weight than they should, if the banding is stronger. Interpolation schemes like the one that Adobe uses (that is highly directional) react very badly to this, it almost amplifies the initial error into the final image.
Since it's a linear function - banding is separated into black offset and amplification offset, and both seem to be very linear in most cases I've seen - the influence isn't disruptive, so some of it can be repaired after interpolation too;
-but not as well as if you do it before sending the raw into the interpolation engine.