Apple Shake 4 - Manual (Page 646)

646 Chapter 23 Color Correction
Parameters
This node displays the following controls in the Parameters tab:
Color
Anything below this value goes to black.
alpha
All areas in the alpha channel below this value go to black.
cCrush
If this is set to 1, everything above the cut-off values goes to 1.
softClip
Provides a roll-off value.
Utility Correctors
These tools are more applicable for preparing data for other operations.
ColorSpace
The ColorSpace node converts an image from one color space to another color space.
After the image is converted, you can use color-correction functions that operate in the
new color space logic for interesting effects. For example, if you place a ColorSpace
node to convert from rgb to hls (hue, luminance, saturation), and then apply a Color–
Add node, the Add node’s red channel shifts your hue, instead of the red channel.
The optional r, g, bWeight arguments only affect rgb to hls, or hls to rgb, conversions.
For command-line use, and compatibility with Shake version 2.1 scripts or earlier, use
the dedicated space conversion functions CMYToRGB, HLSToRGB, HSVToRGB, RGBToCMY,
RGBToHLS, RGBToHSV, RGBToYIQ, RGBToYUV, YIQToRGB, and YUVToRGB. These functions
do not have arguments, with one exception: The HLS functions have optional r, g, and
bWeight parameters.