Difference Key Node

This node produces a matte that isolates foreground content by comparing it with a reference background image.

Inputs

Image

Contains foreground content against the background that is to be removed.

Image

The reference background image.

Properties

Tolerance

Where pixels match the reference background to within the specified threshold, the matte is made transparent.

Falloff

Increase to make nearby pixels partially transparent producing a smoother blend along the edges.

Outputs

Image

Image with its alpha channel adjusted for the keyed selection.

Matte

A black-and-white alpha mask of the key.