Shake - HueCurves

HueCurves

The HueCurves function 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.

To color correct with HueCurves:

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.
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’s name list. When a parameter is loaded, the button is highlighted, and the curve appears in the Curve Editor.
Drag the control point near the hue (.66) down. The saturation is decreased in that particular hue, turning the pure blues to grey.

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.

Parameters	Type	Defaults	Function
r,g,bSuppress	curve float	-	Removes red, green, or blue into the hue area you identify when you drag the key downwards.
r,g,bHue	curve float	-	Adds red, green, or blue from the hue range you identify.
saturation	curve float	-	Removes saturation from the hue range you identify.
luminance	curve float	-	Removes luminance from your area.
satLimit	NA	NA	Not yet implemented.

Synopsis

image HueCurves( 
  image In, 
  curve float rSuppress,
  curve float gSuppress,
  curve float bSuppress,
  curve float rHue,
  curve float gHue,
  curve float bHue,
  curve float saturation,
  curve float luminance,
  curve float satLimit

);

Script

image = HueCurves(
  In,
  rSuppress,
  gSuppress,
  bSuppress,
  rHue,
  gHue,
  bHue,
  saturation,
  luminance,
  satLimit
);

Command Line

Not appropriate for command-line.