Apple Shake 4 - Manual (Page 864)

864 Chapter 28 Filters
The Filter Nodes
The following sections describe each filter node, and include parameters, defaults, and
examples.
ApplyFilter
The ApplyFilter node applies a blur effect like the Blur node, but additionally allows you
to choose separate filters for the X and Y dimensions. You can then scale the default
base range (in pixels) of the predefined filters. For instance, if the default number of
pixels sampled on either side of the base pixel is 3 pixels, an xScale of 2 increases that
range to 6 pixels.
You can change the filter type in the much faster Blur node. The ApplyFilter node exists
only to allow absolute compatibility with images generated by other software
packages.
Note that dirac and impulse filters have no effect with ApplyFilter.
Parameters
This node displays the following controls in the Parameters tab:
xFilter, yFilter
See “
Filters Within Transform Nodes ” on page 862.
xScale, yScale
The amount of filtering in pixels.
spread
Tells Shake whether or not to apply the blur to 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.
Blur
The Blur node blurs the image. This is a Gaussian blur (by default), but you can change
the filter for both X and Y. Use this node instead of the similar, but slower, ApplyFilter
node.