Adobe After Effects CS3 - Manual (Page 397)

AFTER EFFECTS CS3
User Guide
392
Channel Mixer effect
The Channel Mixer effect modifies a color channel using a mix of the current color channels. Use this effect to make
creative color adjustments not easily done with the other color adjustment tools: Create high-quality grayscale
images by choosing the percentage contribution from each color channel, create high-quality sepia-tone or other
tinted images, and swap or duplicate channels.
[output channel]-[input channel] The percentage of the input channel value to add to the output channel value. For
example, a Red-Green setting of 10 increases the value of the red channel for each pixel by 10% of the value of the
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.
Monochrome Uses the value of the red output channel for the red, green, and blue output channels, creating a
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 398
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.
Source Layer The layer from which to sample colors. If you choose None, the layer to which the effect is applied is
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.
Sample Specifies what values are sampled and what operation is performed on them.