RasterFlow
Color

Unpremultiply alpha

gegl:unpremultiply
Unpremultiplies a buffer that contains pre-multiplied colors (but according to the babl format is not.).
Picture not available yet

Operation pads

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

Input
Output

Operation properties

Threshold

Thresholds the image to white/black based on either the global values set in the value (low) and high properties, or per pixel from the aux input.

Value Invert

Invert the value component, the result has the brightness inverted, keeping the color.