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Old network
As of Houdini 20.5, use Copernicus nodes instead of Compositing nodes. Though both networks still exist, the Compositing network is now designated as COP Network - Old. The Compositing network and its nodes will be deprecated and then removed in a future Houdini release.
Lumamatte computes the luminance of the color image, and stores it in the alpha matte.
Note
A similar operation can be done with the Channel Copy COP.
Parameters ¶
LumaMatte ¶
Luminance Range
Allows you to extract a subrange of the luminance and fit it to the 0-1 range of the alpha matte.
Redo Premultiply
If on, the image will first be divided by the original alpha, and then multiplied by the new alpha.
Apply Premultiplies To
Only redo the Premultiplication on these planes (normally color).
Locals ¶
L
Sequence length
S
Start of sequence
E
End of sequence
IL
Input sequence length
SR
Sequence frame rate
NP
Number of planes in sequence
W,H
Width and height of image
I
Image index (0 at start frame)
IT
Image time (0 at start frame)
AI
Current plane array index
PI
Current plane index
PC
Num of channels in current plane
CXRES
Composite Project X resolution
CYRES
Composite Project Y resolution
CPIXA
Composite Project pixel aspect ratio
CDEPTH
Composite Project raster depth
CBP
Composite Project black point
CWP
Composite Project white point
| See also |
