Apple Shake 4 - Manual (Page 880)

880 Chapter 28 Filters
Parameters
This node displays the following controls in the Parameters tab:
xPixels, yPixels
The amount of blur as described in pixels, for example, 200 blurs 200 pixels to either
side of the current pixel. By default, yPixels is linked to xPixels.
spread
Tells Shake whether or not to consider areas outside of the frame. A button to the right
of the parameter name lets you set the mode.
• 0 = Compute “In Frame Only.”
• 1 = Compute “Outside Frame.”
Because of the Infinite Workspace, it is sometimes handy to compute outside of the
frame as well, for example, if the Blur is placed after a Scale command. Note that if
nothing is outside of the frame (black), you see a black edge.
xFilter, yFilter
Lets you pick which method Shake uses to transform the image. For more information,
see “
Filters Within Transform Nodes ” on page 862.
steps
The amount of steps. The intensity of the control image is divided up X amount of
zones, with X equal to steps.
stepBlend
Controls the blending between the amount of regions (see below). If you set this
parameter to 0, each step has a constant blur value. If the setting is 1, there is a
continuous blend between the different regions.
controlChannel
The channel of the controlling image to use to control the amount of blur.
channels
The channels of the input image to blur.
invert
Inverts the controlChannel.
IDefocus
The IDefocus node is the Defocus node with a second image input to control the size of
the defocused flaring. For more information, see “
Defocus ” on page 868.
xPixels, yPixels
Defines the kernel size for the defocus effect, in pixels, which produces the general size
of the defocused flaring in the image. Values lower than 3 have no effect. Progressively
higher values are more processor-intensive to render.