jit.keyscreen
Description
Takes three 4-plane char matrix and does an interchangeable choke chromakey between the three sources. Any of the three input matrices can be designated as the key image (from which the image mask is created), the target image (which the mask is overlaid onto), or the mask image (which is placed on top of the target in the shape of the key).
Examples

Discussion
The jit.keyscreen object takes a color and a tolerance range for the keying. It can work by cell or by plane (set via the mode attribute).
Matrix Operator
Name | IOProc | Planelink | Typelink | Dimlink | Plane | Dim | Type |
---|---|---|---|---|---|---|---|
in2 | resamp | 1 | 1 | 1 | 4 | 1 | char |
in3 | resamp | 1 | 1 | 1 | 4 | 1 | char |
out | n/a | 1 | 1 | 1 | 4 | 1 | char |
More about Matrix Operators
The Jitter MOP
MOP Arguments
MOP Attributes
MOP Messages
Attributes
alpha [float]
The alpha (plane 0) value for the chroma key (default = 0.)
alphatol [float]
The alpha tolerance level for the chroma key (default = 0.)
blue [float]
The blue (plane 3) value for the chroma key (default = 0.)
bluetol [float]
The blue tolerance level for the chroma key (default = 0.)
green [float]
The green (plane 2) value for the chroma key (default = 0.)
greentol [float]
The green tolerance level for the chroma key (default = 0.)
key [int]
The inlet number for the key matrix (default = 0)
A matrix received in the key inlet is used to build the shape of mask image
mask [int]
The inlet number for the mask matrix (default = 2)
A matrix received in the mask inlet is shaped by the key image and occludes the target image
mode [int]
Chomakeying mode (default = 0 (key entire cells))
0 = chroma key entire cells of the input matrices
1 = chroma key individual planes of the input matrices
Possible values:
0 = 'Wrap'
1 = 'Clip'
2 = 'Fold'
red [float]
The red (plane 1) value for the chroma key (default = 0.)
redtol [float]
The red tolerance level for the chroma key (default = 0.)
target [int]
The inlet number for the target matrix (default = 1)
A matrix received in the target inlet is placed behind the mask image
Common Box Attributes
See Also
Name | Description |
---|---|
Working with Video in Jitter | Working with Video in Jitter |
jit.alphablend | |
jit.chromakey | |
jit.lumakey | |
jit.op |