Sharpen filters
Sharpen filters increase the contrast between adjacent pixels, which
can make an image appear more distinct. These commands work
with all image modes except Black & White, Indexed, and Duotone.
The Sharpen filter modifies an image slightly. The effect of
the Sharpen More filter is about four times greater.
The Sharpen Edges filter affects only high-contrast areas.
The Unsharp Mask filter provides additional control over
the sharpening effect.
To sharpen an image
1
Select one or more paint objects to sharpen. You can select an
area in one image to sharpen the selected area only.
2
Choose Image > Filter > Sharpen, and then choose a filter from
the Sharpen submenu.
To apply the Unsharp Mask filter
1
Select one or more paint objects to sharpen. You can select an
area in one image to sharpen the selected area only.
2
Choose Image > Filter > Sharpen > Unsharp Mask.
3
Enter 1 to 500 percent for Amount. Enter less than 100 percent
to sharpen the image slightly.
4
Enter 0.1 to 250 pixels for Radius. This is the size of the area
used to determine new color values for the original pixels. Smaller
values focus the sharpening effect on high-contrast edges.
5
Enter 0 to 255 levels for Threshold. Enter 0 to filter all pixels.
Enter a larger value to filter only high-contrast edges.
Tip
Although the Sharpen and Blur
filters have opposite effects,
they do not negate each other.
To reverse the effects of a
Sharpen filter, choose Undo in
the Edit menu.
Original
Sharpen More
applied 5 times
Sharpen Edges
applied 8 times
Unsharp Mask
Amount = 113
Radius = 4.5
Threshold = 0