Sharpen an image
Use a Sharpen option
to correct blurry images:
- Sharpen
- Adjusts the focus of a blurred image by increasing the contrast
of adjacent pixels.
- Sharpen More
- Increases the contrast of adjacent pixels about three times
as much as Sharpen.
- Unsharp Mask
- Sharpens an image by adjusting the contrast of the pixel
edges. This option offers the most control, so it is usually the
best option for sharpening an image.
Original; after sharpening
Select
the image.
Do one of the following:
In the Property inspector,
click the Add Live Filters button, select Sharpen, and then select
a Sharpen option from the Filters pop-up menu.
Select Filters > Sharpen > [sharpen option].
The
Sharpen or Sharpen More options take effect.
(Unsharp Mask option) Drag the Sharpen Amount slider to select
the amount of sharpening effect from 1% to 500%.
Drag the Pixel Radius slider to select a radius from 0.1
to 250.
An increase in radius results in a greater area of
sharp contrast surrounding each pixel edge.
Drag the Threshold slider to select a threshold of 0 to 255.
Values
between 2 and 25 are most commonly used. An increase in threshold sharpens
only those pixels of a higher contrast in the image. A decrease
in threshold includes pixels of lower contrast. A threshold of 0
sharpens all pixels in the image.
PDF (adobe.com)
