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Fast Blur
Use this effect to blur an image. Specify whether the blur is horizontal, vertical, or both. At
Best quality, the Fast Blur effect is a close approximation of a Gaussian Blur, but it blurs
large areas more quickly. Select Repeat Edge Pixels to blur the contents of the image while
keeping the edges of the image sharp.
Gaussian Blur
This effect blurs and softens the image and can reduce noise. Specify whether the blur is
horizontal, vertical, or both. The layer's quality setting does not affect Gaussian Blur.
Radial Blur
This effect creates blurs around a specific point in a layer, simulating the effects of a
zooming or rotating camera. At Draft quality, the blur appears somewhat grainy. You may
prefer the draft results for special effects, but the grain may flicker on interlaced displays.
The Amount option specifies the amount of blur, depending on the selection for Type. For
a Spin blur, which applies blurs in circles around the center point, the Amount value
indicates the degree of rotation. For a Zoom blur, which applies blur that radiates out from
the center point, the Amount value specifies the degree of radial blurring. You can specify
the level of anti-aliasing applied at Best quality; no anti-aliasing is applied at Draft quality.
Sharpen
This effect increases the contrast where color changes occur. The layer's quality setting
does not affect Sharpen.
A
A. Original image B. Sharpen C. Unsharp Mask
Unsharp Mask
This effect increases the contrast between colors that define an edge. Use the Radius
option to specify the depth of pixels that will be affected at an edge. If you specify a high
value, more of the pixels surrounding the edge are adjusted for contrast. If you specify a
low value, only pixels at the edge are adjusted. Use the Threshold option to specify a
tolerance to define edges and prevent overall contrast adjustment that might generate
noise or cause unexpected results. Values define the range of contrast allowed between
adjacent pixels before contrast is adjusted. A lower value produces a more pronounced
effect.
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