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Adobe After Effects Help
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Curves
Use Curves to adjust the tonal range of an image. You can adjust any point along a 0–255
scale while keeping up to 15 other values constant. The horizontal axis of the graph repre-
sents the original brightness values of the pixels (Input levels); the vertical axis represents
the new brightness values (output levels). In the default diagonal line, all pixels have
identical input and output values. To create a variety of interesting tonal and color effects,
create or import curves and arbitrary maps from Adobe Photoshop. Curves supports all
settings files created in the Photoshop Curves dialog box: either Curves files (.acv) or
Arbitrary map files (.amp). The Curves effect does not support Adobe Photoshop color
tables (.act).
A
B
A. Shadows B. Midtones C. Highlights
For more information, see the After Effects product section on Adobe's Web site.
Hue/Saturation
This effect adjusts the hue, saturation, and lightness of individual color components in an
image. It 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 option to add color to a grayscale image converted to
RGB, or add color to an RGB image.
For more information, see the After Effects product section on Adobe's Web site.
Levels
This effect remaps the range of input color levels onto a new range of output color levels,
and changes the gamma correction curve at the same time. It is useful for basic image
quality adjustment. This effect functions the same as the Levels adjustment in Adobe
Photoshop 5.0 and displays in the same way, as long as monitor calibration is off.
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Applying Effects
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