Figure 18: Gamma Correction Tool
Gamma Value SliderThe gamma value represents a power, so a value of 1.0 is the same as no gamma correction. Although the actual measured gamma value of most monitors is over 2.0, a gamma value of 1.7 is recommended since most applications have historically compensated for a lack of gamma correction by simply making the entire image brighter.
Scope of Gamma CorrectionThis area of the "Gamma correction" window allows you to select all windows to receive gamma correction or only a selected group of windows. Once you have made your selection, you can then save it as the default setting.
Selecting All Windows
To select all windows for gamma correction, single click on the "All Windows" button. Selecting this button applies gamma correction to the colormaps for all windows and will cause images, graphics, and user interfaces to all use the same specified gamma value.
Selecting Individual Windows
When you press "Select A Window," the cursor changes to a crosshair. Next, move the crosshair into the window you wish to modify and click the left mouse button. You will be able to control the gamma value for the colormap associated with the selected window.
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