RasterFlow
Matting

Matting Levin

gegl:matting-levin
Given a sparse user supplied tri-map and an input image, create a foreground alpha mat. Set white as selected, black as unselected, for the tri-map.
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Operation pads

This operation exposes the following data pads, defining how it receives, processes, and emits image data:

Input
Aux
Output

Operation properties

Epsilon
gint
Log of the error weighting.
Default -6
Value range -9 • • -1.
Radius
gint
Radius of the processing window.
Default 1
Value range 1 • • 3.
Threshold
gdouble
Alpha threshold for multilevel processing.
Default 0.02
Value range 0.00 • • 0.10.
Lambda
gdouble
Trimap influence factor.
Default 100.00
Value range 0.00 • • 100.00.
Levels
gint
Number of downsampled levels to use.
Default 4
Value range 0 • • 8.
Active levels
gint
Number of levels to perform solving.
Default 2
Value range 0 • • 8.

Matting Global

Given a sparse user supplied tri-map and an input image, create a foreground alpha matte. Set white as foreground, black as background for the tri-map. Everything else will be treated as unknown and filled in.

Display

Display the input buffer in a window.