GammaGain

GammaGain can be used to adjust the overall gamma and gain of an image while maintaining the original perceived saturation.

Grade node (gamma .5, gain 2)	Original	GammaGain (gamma .5, gain 2)

GammaGain can be found in the “Color” menu.

Adjust the gamma and gain sliders as you would with a standard “Grade” node.

“Restore saturation” can be used to adjust the overall saturation correction. A value of 0 will match the saturation of the original image, while a value of 1 will match the result of what you would get if you applied the same gamma and gain correction through a “Grade” node.

(you can also enter values below 0 to get the reverse of the saturation correction, or values above 1 to exaggerate the correction.)

Copy GammaGain.so to a startup directory.

Copy the following lines into your menu.py:

Import nuke

ColorMenu = nuke.menu('Nodes').menu('Color')

ColorMenu.addCommand('GammaGain', 'nuke.createNode('GammaGain')')