Adobe AFTER EFFECTS CS3 PROFESSIONAL User Manual page 402

AFTER EFFECTS CS3 396
User Guide
This effect works with 8-bpc, 16-bpc, and 32-bpc color.
Adjust all channels simultaneously.
Master
Adjust channels individually.
Individual Channels
Simulates the exposure setting on the camera that captures the image, multiplying all light intensity values
Exposure
by a constant. The units for Exposure are f-stops.
Darkens or brightens the shadows and midtones with minimal change to the highlights.
Offset
The amount of gamma correction to use for adding an additional power-curve adjustment to the
Gamma Correction
image. Higher values make the image lighter; lower values make the image darker. Negative values are mirrored
around zero (that is, they remain negative but still get adjusted as if they were positive). The default value is 1.0, which
corresponds to no additional adjustment.
Note: In previous versions of After Effects, the Gamma Correction property was the Gamma property, and its behavior
was reversed.
Select to apply the Exposure effect to the raw pixel values. This option can be useful
Bypass Linear Light Conversion
if you manage color manually using the Color Profile Converter effect.
See also
"Adjust exposure for previews" on page 133
"High dynamic range color" on page 235
Gamma/Pedestal/Gain effect
The Gamma/Pedestal/Gain effect adjusts the response curve independently for each channel. For pedestal and gain,
a value of 0.0 is completely off, and a value of 1.0 is completely on.
The Black Stretch control remaps the low pixel values of all channels. Large Black Stretch values brighten dark areas.
Gamma specifies an exponent describing the shape of the intermediate curve. The Pedestal and Gain controls specify
the lowest and highest attainable output value for a channel.
This effect works with 8-bpc color.
Hue/Saturation effect
The Hue/Saturation effect adjusts the hue, saturation, and lightness of individual color components in an image. This
effect is based on the color wheel. Adjusting the hue, or color, represents a move around the color wheel. Adjusting
the saturation, or purity of the color, represents a move across its radius. Use the Colorize control to add color to a
grayscale image converted to RGB, or to add color to an RGB image.
This effect works with 8-bpc, 16-bpc, and 32-bpc color.
The color channel you want to adjust. Choose Master to adjust all colors at once.
Channel Control
The definition of the color channel chosen from the Channel Control menu. Two color bars
Channel Range
represent the colors in their order on the color wheel. The upper color bar shows the color before the adjustment;
the lower bar shows how the adjustment affects all of the hues at full saturation. Use the adjustment slider to edit any
range of hues.
Specifies the overall hue of the channel chosen from the Channel Control menu. Use the dial, which
Master Hue
represents the color wheel, to change the overall hue. The underlined value displayed above the dial reflects the