Adobe AFTER EFFECTS CS3 PROFESSIONAL User Manual page 397

AFTER EFFECTS CS3 391
User Guide
green channel for that pixel. A Blue-Green setting of 100 and a Blue-Blue setting of 0 replaces the blue channel values
with the green channel values.
[output channel]-Const
The constant value (as a percentage) to add to the output channel value. For example, a Red-
Const setting of 100 saturates the red channel for every pixel by adding 100% red.
Uses the value of the red output channel for the red, green, and blue output channels, creating a
Monochrome
grayscale image.
This effect works with 8-bpc and 16-bpc color.
Color Balance effect
The Color Balance effect changes the amount of red, green, and blue in the shadows, midtones, and highlights of an
image.
Preserve Luminosity preserves the average brightness of the image while changing the color. This control maintains
the tonal balance in the image.
This effect works with 8-bpc and 16-bpc color.
Color Balance (HLS) effect
The Color Balance (HLS) effect alters an image's levels of hue, lightness, and saturation. It's intended only to provide
compatibility with projects created in earlier versions of After Effects that use the Color Balance (HLS) effect. For
new projects, use the Hue/Saturation effect, which operates the same as the Hue/Saturation command in Adobe
Photoshop. You can convert a movie to grayscale by setting the Saturation to –100.
This effect works with 8-bpc and 16-bpc color.
See also
"Hue/Saturation effect" on page 396
Color Link effect
The Color Link effect colorizes one layer with the average pixel values of another layer. This effect is useful for
quickly finding a color that matches the color of a background layer.
This effect works with 8-bpc color.
The layer from which to sample colors. If you choose None, the layer to which the effect is applied is
Source Layer
used as the source layer, taking into account any masks and other effects applied to the layer. If you choose the layer's
name from the menu, the source layer without masks and effects is used.
Specifies what values are sampled and what operation is performed on them.
Sample
The percentage of pixels to ignore at the extreme channel values. This clipping is useful for reducing the
Clip
influence of noise or other nonrepresentative pixels.
The effect places a stencil of the layer's original alpha channel over the new value.
Stencil Original Alpha
The effect's opacity. The result of the effect is blended with the original image, with the effect result
Opacity
composited on top. The lower you set this value, the less the effect affects the layer. For example, if you set this value
to 0%, the effect has no visible result on the layer; if you set this value to 100%, the original image doesn't show
through.