ImageClamp

This node constrains, or clamps, values in the selected channels to a specified minimum and/or maximum range.

Connection Type	Connection Name	Function
Input	input	The image sequence the values of which you want to clamp.
Input	out_mask	An optional image to use as a mask. By default, the clamp effect 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.
ImageClamp parameters continued
clamp	Both	Sets which values are use to clamp the input: • Both - min and max rgba values are clamped. • Max - only the max rgba clamps are used. • Min - only the min rgba clamps are used.
min
red	0	Sets the minimum values at which the rgba channels are clamped. For more information, refer to the Color Widget Type in the Common Parameter Widgets.
green	0
blue	0
alpha	0
max
red	16	Sets the maximum values at which the rgba channels are clamped. For more information, refer to the Color Widget Type in the Common Parameter Widgets.
green	16
blue	16
alpha	1
inputs	Unpremultiplied	Select whether you are using a premultiplied or unpremultiplied input image: • Premultiplied - the ImageClamp node unpremultiplies the input, applies the clamp effect, and premultiplies the input again. This simulates applying the clamp before the premultiplication was done, as color corrections are typically applied on unpremultiplied images. • Unpremultiplied - the ImageClamp node simply applies the contrast change.