Inverting Channel Values

To invert a channel is to subtract its values from one, which causes its blacks to become white and its whites to become black. In the course of building a script, you’ll have frequent need to invert mattes in particular.

Inverting channel values.	Inverting channel values.

To invert channels you use Nuke’s Invert node.

To invert channel values

1.

Click Color > Invert to insert an Invert node at the appropriate point in your script.

2.

Connect a Viewer to the output of the Invert node so you can see the effect of your changes.

3.

In the Invert properties panel, use the channels field to select the channel you wish to invert.