Graphics Programs Reference
In-Depth Information
Step Three:
When the Unsharp Mask dialog appears, you'll see three sliders. The Amount slider de-
termines the amount of sharpening applied to the photo; the Radius slider determines how
many pixels out from the edge the sharpening will affect; and Threshold determines how
different a pixel must be from the surrounding area before it's considered an edge pixel and
sharpened by the filter (by the way, the Threshold slider works the opposite of what you
might think—the lower the number, the more intense the sharpening effect). So what num-
bers do you enter? I'll give you some great starting points on the following pages, but for
