Difference node


This documentation is for version 1.0 of Difference.


Produce a rough matte from the difference of two input images.

A is the background without the subject (clean plate). B is the subject with the background. RGB is copied from B, the difference is output to alpha, after applying offset and gain.

See also: http://opticalenquiry.com/nuke/index.php?title=The_Keyer_Nodes#Difference and http://opticalenquiry.com/nuke/index.php?title=Keying_Tips


Input Description Optional
B The subject with the background. No
A The background without the subject (a clean plate). No


Parameter / script name Type Default Function
Offset / offset Double 0 Value subtracted to each pixel of the output
Gain / gain Double 1 Multiply each pixel of the output by this value