This filter is found in
Image>Filters/Distorts/Value
Propagate
It works on color borders. It spreads pixels that have a Value
between selected thresholds, in selected directions.
10.13.2.
Options
Preview
The result of your settings will appear in the Preview without
affecting the image until you click on OK.
Propagate Mode
The examples will be about the following image (zoom x8):
Figure 11.121.
Example
More White: Pixels will be propagated
from upper Value pixels towards lower Value pixels. So bright
areas will enlarge.
Figure 11.122.
More White
More Black: Pixels will be propagated
from lower Value pixels towards upper Value pixels. So dark
areas will enlarge.
Figure 11.123.
More Black
Middle Value to Peaks: On a border between
the selected thresholds, it blends the two colors.
Figure 11.124.
Middle Value to Peaks
Foreground to Peaks: The propagated areas
will be filled with the foreground color of the toolbox.
Figure 11.125.
Foreground to Peaks
Only Foreground: Only areas with the
Foreground color will propagate.
Figure 11.126.
Only Foreground
Only Background: Only areas with the
Background color will propagate.
More Opaque and More
Transparent:
These commands work like More White and More Black. Propagated
areas will be more opaque or more transparent. These commands
need an image with an Alpha channel.
Parameters Settings
Lower Threshold
Lower Threshold and Upper
Threshold:
These commands allow you to set the Value range that will
be concerned by Propagate.
Propagating Rate
Propagating Rate: That's the
propagating amount. The higher it will be the more
colored the propagation will be.
Propagating Direction
Propagating Direction: You can select
one or more directions.
Published under the terms of the GNU General Public License
