Originally posted by slipchuck Are they refering to the jpg sharpening in camera, or the sharpening that can be put on with ACR to the raw image?
does ACR sharpen only the edges?
when I boost the sharpening with ACR it might show up in large prints?
The article was talking about in-camera sharpening of jpegs. It was targetted mainly at users of P&S cameras, but I was extending it's meaning to the current debate around C/N sharpening and Pentax.
When you apply sharpening (say unsharp mask for the sake of argument) it increases contrast on any "edge" it can find. Without judicious use of "clipping" that can mean that texture is "enhanced" as well as edges, or worse, it may find edges where you don't even want texture. The quick way of getting round this is to increase "clipping" until only the edges are picked up.
A more advanced way is to create a mask layer based on finding edges in the original image (you'll need to increase its contrast of the mask, touch out any "edges" you don't want sharpening, and blur it to produce a more natural effect), then apply sharpening to the masked image and it will only be applied to the edges you want sharpening.
That was a very abbreviated description of the process. I hope it makes sense.
Simon