RasterFlow
Distort

Value Propagate

gegl:value-propagate
Propagate certain values to neighboring pixels. Erode and dilate any color or opacity.
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Operation pads

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

Input
Output

Operation properties

Mode
dictionary
Mode of value propagation.
Default More white (larger value)
Possible values More white (larger value) • More black (smaller value) • Middle value to peaks • Color to peaks • Only color • More opaque • More transparent
Lower threshold
gdouble
The minimum difference in value at which to propagate a pixel.
Default 0.00
Value range 0.00 • • 1.00.
Upper threshold
gdouble
The maximum difference in value at which to propagate a pixel.
Default 1.00
Value range 0.00 • • 1.00.
Propagating rate
gdouble
The strength with which to propagate a pixel to its neighbors.
Default 1.00
Value range 0.00 • • 1.00.
Color
GeglColor
Color to use for the "Only color" and "Color to peaks" modes.
Default ``
To top
gboolean
Propagate to top.
Default true
To left
gboolean
Propagate to left.
Default true
To right
gboolean
Propagate to right.
Default true
To bottom
gboolean
Propagate to bottom.
Default true
Propagating value channel
gboolean
Whether to propagate a pixel's color.
Default true
Propagating alpha channel
gboolean
Whether to propagate a pixel's opacity.
Default true

Spherize

Wrap image around a spherical cap.

Video Degradation

This function simulates the degradation of being on an old low-dotpitch RGB video monitor.