Gamma is a numerical value that indicates the relationship between the input and the output signals of a camera/monitor, as illustrated in the graph above. Generally, the more closely a gamma curve approaches a straight line (=1), the more natural the image appears to the human eye. Because monitors have a gamma curve that dips below the straight line, cameras are usually set up with a reverse gamma so that the resultant curve when they are added is close to a straight line. The lower area of the curve affects dark colors while the higher area determines the colors close to white. The middle area represents colors in between. The PMW-EX1 is preset with several gamma curves (STANDARD1-4 and CINE1-4) which can be selected to obtain the desired color balance and contrast. These presets can be modified with the Gamma function to obtain customized color reproduction. In addition, the Black Gamma function allows you to make gamma curve adjustments affect only the darker sections of the image. These gamma adjustments are an effective way to widen the unit’s expressive range.
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