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# ImageGain

This node lets you adjust the gain in your input image. In other words, it multiplies a channel's values by a given factor, which has the effect of lightening the channel while preserving the blackpoint.

Connection Type | Connection Name | Function
Input | input | The image sequence the gain of which you wish to modify.
out_mask | An optional image to use as a mask. By default, the merge is limited to the non-black areas of the mask.

Control (UI) | Default Value | Function
[2D node controls] | N/A | Set the controls for the stereo view. For more information, refer to the Common 2D Nodes Widget Type in Common Parameter Widgets.
units: F-Stops
fsIntensity | 0 | Adjusts f-stop intensity.
units: Gain
gIntensity | 1 | Adjusts gain intensity.
units: F-Stops > fsColor
red | 0 | Adjusts f-stop in the red channel.
green | 0 | Adjusts f-stop in the green channel.
blue | 0 | Adjusts f-stop in the blue channel.
fsAlpha | 0 | Adjusts f-stop in the alpha channel.
units: Gain > gColor
red | 1 | Adjusts gain in the red channel.
green | 1 | Adjusts gain in the green channel.
blue | 1 | Adjusts gain in the blue channel.
gAlpha | 1 | Adjusts gain in the alpha channel.
units | F-Stops | Select the units in which the gain is altered: • F-Stops - use the fsColor controls to adjust gain. • Gain - use the gColor controls to adjust gain.