2011

Table Of Contents
To:Use:
Set the amount of blur to apply in the radial direction (before
taking into account the rotation parameter). The amount of blur
Zoom
is specified in degrees; the further a pixel is located from the
center of the radial blur, the more it is blurred. Expressing the
Zoom parameter in degrees allows it to share the same units as
the Spin parameter. This lets you express a given amount of blur
in either the radial or the tangential direction.
Set the amount of blur to apply in the tangential direction (before
taking into account the rotation parameter.) The amount of blur
Spin
is specified in degrees; the further a pixel is located from the
center of the radial blur, the more it is blurred.
Controls how the strength of the blur relates to distance from the
center of the effect. Increasing the amount of focus keeps the
Focus
center of the effect in focus at the expense of the outer rim. With
a Focus value of zero, the strength of the blur increases linearly
with distance from the center.
390 | Chapter 17 Image Processing Tools