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Selects certain areas of the input image based on how similar they are to a specific color. The resulting selection takes the form of a map in the red channel of the node's output, with pixels of full brightness indicating areas that completely passed the selection test and black pixels indicating areas that completely failed the test.
In this example a Selector node was used to select only the silver parts of
the shield. The resulting map was then used to color those parts purple.
The node's only input provides the original image that is to be selected.
Page URL: http://www.spiralgraphics.biz/genetica/help/index.htm?selector.htm