108 Chapter 4: Working with Bitmaps
To sharpen an image using a sharpen option:
1. Select the image.
2. Do one of the following to select a sharpen option:
■ In the Property inspector, click the Add Live Filters button, and then select Sharpen >
Sharpen or Sharpen More from the Filters pop-up menu.
■ Select Filters > Sharpen > Sharpen or Sharpen More.
To sharpen an image using Unsharp Mask:
1. Select the image.
2. Do one of the following to open the Unsharp Mask dialog box:
■ In the Property inspector, click the Add Live Filters button, and then select Sharpen >
Unsharp Mask from the Filters pop-up menu.
■ Select Filters > Sharpen > Unsharp Mask.
3. Drag the Sharpen Amount slider to select the amount of sharpening effect from 1% to
500%.
4. 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.
5. 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.
6. Click OK.
NOTE
Applying a filter from the Filters menu is destructive; that is, it cannot be undone
except when Edit > Undo is an option. To maintain the ability to adjust, turn off, or
remove this filter, apply it as a Live Filter, as described in the first bulleted option in
this step. For more information, see Chapter 8, “Using Live Filters,” on page 193.
NOTE
Applying a filter from the Filters menu is destructive; that is, it cannot be undone
except when Edit > Undo is an option. To maintain the ability to adjust, turn off, or
remove this filter, apply it as a Live Filter, as described in the first bulleted option in
this step. For more information, see Chapter 8, “Using Live Filters,” on page 193.
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