Document # 82070-1026, Revision B
CONFIDENTIAL
© 2011 Copyright VTS Medical Systems, LLC
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Glossary
Black Level:
This adjustment allows the display to be set to discriminate between small differences in dark or near
black areas of the image. The adjustment should make a black area of the image (such as a deep shadow where all
detail is lost in the image) appear black. The black level is decreased (less black) until a change toward light or grey
is perceived in this area, then the adjustment increases slightly to restore the dark area to black. It is important to
perform this adjustment on a truly black area in the image to avoid making dark areas appear lighter than they
actually are.
Luminance:
The intensity of light emitted from the LCD Display. This control is similar to the effect of changing the
light behind a stained glass window. As the illumination is increased the overall light output of the image is increased.
The proper adjustment takes into consideration the ambient light in the room. For a brightly lit room, the brightness of
the display may be increased to improve the visibility of the image. In a dimly lit room, the brightness may be
decreased to reduce the impact on the eye.
Contrast:
Contrast is the differentiation between variations of similar colors. Typically contrast is set by adjusting for
best color differentiation between light yellow and white.
Hue:
Hue refers to the “shade” of the colors. These adjustments primarily affect analog signal sources. S-Video,
RGBHV and VGA are analog signals. Adjusting the hue will help to correct abnormalities in the signal. The
adjustment can help restore the “natural” look of the colors.
Saturation:
Saturation refers to the purity of any particular color component (Red, Green or Blue). For example,
100% Red saturation is 100% Red, 0% Green and 0% Blue. No saturation means all the color percentages are
equal. Changes in saturation will change the emphasis of the selected color component.
