Apple Shake 4 - Manual (Page 881)

Chapter 28 Filters 881
channels
Lets you set which channels Shake should blur. You can choose one or all of the red,
green, blue, or alpha channels. The default is “rgba.”
percent
A slider that lets you mix the modified image and the original image together to
produce a blend of both. By default, this parameter is set to 100 percent, resulting in
100 percent of the modified image being output.
shape
A pop-up menu that lets you choose the shape of the flaring in the resulting image.
The fast modes give you low quality but process quickly. The circle, square, hexagon,
and octagon give you a superior look, but are significantly more processor-intensive to
render. The options are:
• fast gaussian
• fast box
• circle
• square
• hexagon
• octagon
boostPoint
The image value where the superwhite boosting starts. If boostPoint is set to .75, RGB
values above .75 are boosted to increase flaring effects. A high value generally
decreases flare areas, since fewer candidate pixels are flared. By default this is set to .95.
superWhite
Max value to boost image to. A value of 1 in the original will be boosted to this value.
By boosting this value, you increase the brightness of the flare area. Values around 50
yield a very strong boost.
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 put this at 0,
each step has a constant blur value. If this 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 defocus.