Graphics Programs Reference
In-Depth Information
Step Three:
When the Unsharp Mask dialog
appears, you'll see three sliders. The
Amount slider determines the amount
of sharpening applied to the photo;
the Radius slider determines how many
pixels out from the edge the sharpen-
ing 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
numbers do you enter? I'll give you some
great starting points on the following
pages, but for now, we'll just use these
settings—Amount: 120%, Radius: 1, and
Threshold: 3. Click OK and the sharpen-
ing is applied to the entire photo (see
the After photo below).
Before
After
(Continued)
