Difference node
This documentation is for version 1.0 of Difference (net.sf.openfx.DifferencePlugin).
Description
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: https://web.archive.org/web/20220524000628/http://www.opticalenquiry.com/nuke/index.php?title=The_Keyer_Nodes#Difference and https://web.archive.org/web/20211023071843/http://opticalenquiry.com/nuke/index.php?title=Keying_Tips
Inputs
Input |
Description |
Optional |
---|---|---|
B |
The subject with the background. |
No |
A |
The background without the subject (a clean plate). |
No |
Controls
Parameter / script name |
Type |
Default |
Function |
---|---|---|---|
Offset / |
Double |
0 |
Value subtracted to each pixel of the output |
Gain / |
Double |
1 |
Multiply each pixel of the output by this value |