Apple Shake 4 - Manual (Page 672)

672 Chapter 23 Color Correction
hueFalloff
This describes the amount of falloff from the affected to the unaffected hue region. A
greater hueFalloff value includes more color values at the edges of the hueRange.
satRange
The range of the saturation from the Source color; 1 is the entire range.
satFalloff
This describes the amount of falloff from the affected amount of saturation to the
unaffected amount of saturation. A greater satFalloff value includes more saturated
values at the edges of the satRange.
valRange
Defines the range of value that is added to the HSV value selected in sourceColor to
include a wider field of values. 1 is the entire range.
valFalloff
This describes the amount of falloff from the affected amount of value to the
unaffected amount of value. A greater satFalloff value includes more saturated values at
the edges of the satRange.
HueCurves
The HueCurves node allows you to perform various color corrections (Add, Saturation,
Brightness) on isolated hues through the use of the Curve Editor. Typically, this tool is
used for spill suppression, but you can also do color corrections once you understand
how it is used.
Note: The HueCurves node should not be used inside of macros.
To color correct with the HueCurves node:
1 Find the hue of the area you want to color correct with the Color Picker. For example, if
you have blue spill, the hue is approximately .66.
2 Load the parameter you want to use into the Curve Editor. For example, to load
saturation into the Curve Editor, click the button to the left of “saturation” in the
parameter list.
When a parameter is loaded, the button is highlighted, and the curve appears in the
Curve Editor.
3 Drag the control point near the hue (.66) down.
The saturation is decreased in that particular hue, turning the pure blues to gray.
By default, all curves have a value of 1 until you modify the value downward.
Additionally, be careful with red-hued targets, as you may have to drag both the first
and last control point on the curve.