Adobe After Effects CS3 - Manual (Page 403)

AFTER EFFECTS CS3
User Guide
398
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.
Channel Control The color channel you want to adjust. Choose Master to adjust all colors at once.
Channel Range The definition of the color channel chosen from the Channel Control menu. Two color bars
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.
Master Hue Specifies the overall hue of the channel chosen from the Channel Control menu. Use the dial, which
represents the color wheel, to change the overall hue. The underlined value displayed above the dial reflects the
number of degrees of rotation around the wheel from the pixel’s original color. A positive value indicates clockwise
rotation; a negative value indicates counterclockwise rotation. Values range from –180 to +180.
Master Saturation, Master Lightness Specify the overall saturation and lightness of the channel chosen from the
Channel Control menu. Values range from –100 to +100.
Colorize Adds color to a grayscale image converted to RGB, or adds color to an RGB image—for example, to make
it look like a duotone image by reducing its color values to one hue.
Colorize Hue, Colorize Saturation, Colorize Lightness Specify the hue, saturation, and lightness of the color range
chosen from the Channel Control menu. After Effects displays only the sliders for the Channel Control menu choice.
Adjust colors with the Hue/Saturation effect
1 Choose Effect > Color Correction > Hue/Saturation.
2 From the Channel Control menu, choose which colors to adjust:
• Choose Master to adjust all colors at once.
• Choose a preset color range for the color you want to adjust, and then use the sliders for that color range.
3 For Hue, type a value or drag the dial.
4 For Saturation, type a value or drag the slider. The color shifts away from or toward the center of the color wheel,
relative to the beginning color values of the selected pixels.
5 For Lightness, type a value or drag the slider.
Colorize an image or create a monotone result
1 Choose Effect > Color Correction > Hue/Saturation.
2 Select Colorize. The image is converted to the hue of the current foreground color. The lightness value of each
pixel doesn’t change.