Apple Shake 4 - Manual (Page 868)

868 Chapter 28 Filters
Defocus
The Defocus blur node is a more accurate model of the blurring that occurs through an
out-of-focus real-world camera lens. It flares out the high points, resulting in a circular,
hexagonal, or octagonal shape around the highlights.
Parameters
This node displays the following controls in the Parameters tab:
xPixels, yPixels
Defines the kernel size for the defocus, 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.
channels
Lets you set which channels Shake should defocus. You can choose one or all of the
red, green, blue, or alpha channels. The default is “rgba.”
Original image Real camera defocus
Image blurred with normal
Gaussian blur in Shake Image blurred with Defocus node in
Shake