Unpremult node


This documentation is for version 2.0 of Unpremult.


Divide the selected channels by alpha (or another channel)

If no channel is selected, or the premultChannel is set to None, the image data is left untouched, but its premultiplication state is set to UnPreMultiplied.

See also: http://opticalenquiry.com/nuke/index.php?title=Premultiplication


Input Description Optional
Source   No


Parameter / script name Type Default Function
Plane / inputPlane Choice Color.RGBA
The plane channels to premult
Color.RGBA (uk.co.thefoundry.OfxImagePlaneColour)
DisparityLeft.Disparity (uk.co.thefoundry.OfxImagePlaneStereoDisparityLeft)
DisparityRight.Disparity (uk.co.thefoundry.OfxImagePlaneStereoDisparityRight)
Backward.Motion (uk.co.thefoundry.OfxImagePlaneBackMotionVector)
Forward.Motion (uk.co.thefoundry.OfxImagePlaneForwardMotionVector)
By / premultChannel Choice Color.A
The channel to use for (un)premult.
Color.R (uk.co.thefoundry.OfxImagePlaneColour.R): R channel from input Source
Color.G (uk.co.thefoundry.OfxImagePlaneColour.G): G channel from input Source
Color.B (uk.co.thefoundry.OfxImagePlaneColour.B): B channel from input Source
Color.A (uk.co.thefoundry.OfxImagePlaneColour.A): A channel from input Source
0: 0 constant channel
1: 1 constant channel
All Planes / processAllPlanes Boolean Off When checked all planes in input will be processed and output to the same plane as in input. It is useful for example to apply a Transform effect on all planes.
Clip Info... / clipInfo Button   Display information about the inputs