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# ImageContrast

This adjusts the input image's contrast around a fixed color point.

Connection Type | Connection Name | Function
Input | input | The image sequence the contrast of which you want 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.
contrast
rgb | 1 | Adjusts the image contrast in the r, g, and b channels.
r | 1 | Adjusts the image contrast in the red channel only.
g | 1 | Adjusts the image contrast in the green channel only.
b | 1 | Adjusts the image contrast in the blue channel only.
a | 1 | Adjusts the image contrast in the alpha channel only.
fixedPoint
fixedPoint | 0.1800, 0.1800, 0.1800, 0.500 | The point from which to influence the contrast. When contrast is greater than one, colors are moved away from this value, when the contrast is below one, colors are moved towards this value. You can also use the below RGB, HSL, or HSV controls to set the color. For more information, refer to the Color Widget Type in the Common Parameter Widgets.
contrastFunction | Power | Select the contrast function to use: • Power • Linear
inputs | Unpremultiplied | Select whether you are using a premultiplied or unpremultiplied input image: • Premultiplied - the ImageContrast node unpremultiplies the input, applies the contrast change, and premultiplies the input again. This simulates applying the contrast change before the premultiplication was done, as color corrections are typically applied on unpremultiplied images. • Unpremultiplied - the ImageContrast node simply applies the contrast change.