Colormap Rotation lets you exchange one color range (the Source Range) to another range (the Destination Range).
“Presets” are a common feature for several Colors commands. You can find its description in Section 8.1.1, “Colors Common Features”.
Both source and destination range have a color wheel range selection circle. You can drag both arrow handles to the color location you want. They correspond to the From and To sliders listed below.
The angle of the starting position of the color range on the color wheel.
The angle of the ending position of the color range on the color wheel.
When checked the range from start to end is computed clockwise, else counter-clockwise (default).
This button inverts the From and To values.
This button selects all colors to be inside the range.
In this section, you can specify how to treat gray. By default, gray is not considered as a color and is not taken in account by the rotation. Here, you can convert slightly saturated colors into gray and you can also convert gray into a color depending on the settings below.
The small circle in the color wheel adjusts the Hue and Saturation that will be used to select the color that represents gray. They correspond to the Hue and Saturation sliders listed below.
This slider selects which colors will be treated as gray. Colors with a Saturation less than this value will be converted to the selected "gray" color.
Treat as this causes gray colors inside the source range to be treated as if they had this Hue and saturation. The color will be rotated according to the source and destination ranges.
Change to this will change gray colors to the selected Hue and Saturation without any rotation.
These are common features described in Section 8.1.1, “Colors Common Features”.
Using the same example as at the top of this page, but now with the following gray handling settings used: Gray threshold 0.340, Hue 220.0, Saturation 0.75.
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If you want gray instead of a different color, you should leave Hue and Saturation at 0. |