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10.13.  Value Propagate

10.13.1.  Overview

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


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 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

    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

    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

    Foreground to Peaks
  • Only Foreground: Only areas with the Foreground color will propagate.

    Figure 11.126.  Only Foreground

    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 Design by Interspire