3.2.  Adjust FG-BG

Revision History
Revision $Revision: 1963 $ 2007-05-15 ude

3.2.1.  Overview

Figure 15.20.  Applying example for the “Adjust FG-BG” filter

Applying example for the Adjust FG-BG filter

Original image

Applying example for the Adjust FG-BG filter

Filter “Adjust FG-BG” applied

You can find this filter through FiltersColorsMapAdjust FG-BG.

Adjust FG-BG belongs to color map filters which make connection between a color source and an image. Here, image pixels having ForeGround color will turn to black while pixels having BackGround color will turn to white. Other colors are interpolated. There will be no change if FG is black and BG is white.

Note that this filter is just a special case of the Map Color Range filter with its default colors: source colors are foreground and background color, destination colors are black and white.

[Caution] Caution

This filter does not work as expected, if the values of foreground and background color are the same for some color channel (red, green, or blue).

Even worse: the filter will happily accept your colors without displaying a warning or error message.