36 Chapter 2: TARGA Specific Control Panels Within Adobe Premiere
—Contrast -- In a video waveform this is how far the whitest whites are from the blackest
blacks. If the peak white is far away from the peak black, the image is said to have high
contrast. If the peaks are close together, the image will have low contrast (i.e., the image will
look “washed out”). Think of contrast as the overall gain control. This control slider affects
all video output formats.
—Brightness -- This is the amount of overall luminance perceived. Brightness is the intensity of
the video level and refers to how much light is emitted by the display. This control slider
affects all video output formats.
—Hue -- The property or wavelength of a color. Hue is the attribute of a color perception for
base colors such as red, yellow, green, and blue. Hue is completely separate from the
intensity or saturation of a color. A hue has only one wavelength associated with it while a
blend of hues, such as white, has multiple wavelengths. Therefore, white and black are colors
but not hues. The Hue control adjusts the subcarrier phase so that the displayed “color”
agrees with your conception. An example is the flesh tone of a person. This can be adjusted
over a “gamut” of red to green, but the “colors” within that gamut would have the same hue.
This control slider only affects the composite and S-Video outputs.
—Sharpness -- This controls the contrast at a boundary within an image. As such, it is an
attribute of the luminance bandwidth. Increasing “sharpness” increases the luminance
bandwidth. This control slider affects all video output formats.
—B-Y Gain -- Adjustments made here increase or decrease the peak-to-peak amplitude of the
B-Y (blue minus luminance) color channel. Note that an adjustment here simultaneously
affects the color level on composite, S-Video, and YUV.
—R-Y Gain -- Adjustments made here increase or decrease the peak-to-peak amplitude of the
R-Y (red minus luminance) color channel. Note that an adjustment here simultaneously
affects the color level on composite, S-Video, and YUV.
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