Search Tips

Search is based on keyword.

`Ex: "Procedures"`

Do not search with natural language

`Ex: "How do I write a new procedure?"`

Give Feedback Support Portal

# ImageUnpremultiply

This node divides the RGB channels by the alphaChannel when an image is connected to the alpha input. Otherwise, a is read from the input leaving the alpha channel unchanged.

Also see ImagePremultiply.

Connection Type | Connection Name | Function
Input | input | The image sequence you want to unpremultiply. If no alpha input is connected, this input should contain an alpha channel to use for unpremultiplying the color channels.
alpha | An optional input for attaching a separate channel that is used to unpremultiply the input image. If this input is connected, you can use alphaChannel to select the channel to use.
out_mask | An optional image to use as a mask. By default, the unpremultiplication 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.
ImageUnpremultiply parameters continued
alphaChannel | A | If a separate alpha input is provided, choose which of its channels to use to unpremultiply. If no separate alpha input is provided, the alpha from input is used and this control is disabled.