# Gamma node¶

This documentation is for version 2.0 of Gamma (net.sf.openfx.GammaPlugin).

## Description¶

Apply gamma function to the selected channels. The actual function is pow(x,1/max(1e-8,value)).

## Inputs¶

Input Description Optional
Source   No
Mask   Yes

## Controls¶

Parameter / script name Type Default Function
Value / value Color r: 1 g: 1 b: 1 a: 1 Gamma value to apply to the selected channels.
Invert / invert Boolean Off Invert the gamma transform.
(Un)premult / premult Boolean Off Divide the image by the alpha channel before processing, and re-multiply it afterwards. Use if the input images are premultiplied.
Invert Mask / maskInvert Boolean Off When checked, the effect is fully applied where the mask is 0.
Mix / mix Double 1 Mix factor between the original and the transformed image.