Difference Key Node¶

../../../_images/compositing_nodes_matte_difference-key.png

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.