Gamma node — Natron 2.5.0 documentation

# 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.