Sharpening a photo
The Sharpen tool allows you to sharpen all or parts
of your photo using a technique based on the tradition
of using an unsharp mask in a darkroom
to increase the perception of sharpness
by emphasizing edges.
Most digital photos have a slight softness in the fine details
and would benefit from sharpening.
To sharpen your photo:
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Click the sharpen tool button in the
tool bar.
(A new sharpen tool will appear at the top of the
tool stack.)
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Use the sliders to adjust the sharpness:
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The Amount slider controls how much sharpening is done.
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The Radius slider controls how widely the sharpening effect
is done around each pixel.
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The Threshold slider controls how different each pixel must be
from its surrounding area
before it is considered an edge pixel and therefore sharpened.
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Optionally:
Note:
It's best to be viewing your photo fully zoomed-in before sharpening it
by selecting View > Actual Pixels.