Color Correction Effects - Adobe AFTER EFFECTS CS3 PROFESSIONAL User Manual

AFTER EFFECTS CS3 386
User Guide
Composites the new matte with the current layer, rather than replacing it. The
Composite Matte With Original
resulting matte allows the image to show through only where the current matte and the new matte both have some
opacity.
Premultiplies the new matte layer with the current layer.
Premultiply Matte Layer
Shift Channels effect
The Shift Channels effect replaces red, green, blue, and alpha channels in the image with other channels.
This effect works with 8-bpc, 16-bpc, and 32-bpc color.
The channel to use as a source.
Take Channel From
Solid Composite effect
The Solid Composite effect offers a quick way to create a composite of a new color solid behind the original source
layer.
This effect works with 8-bpc, 16-bpc, and 32-bpc color.
The opacity of the source layer.
Source Opacity
The color of the solid.
Color
The opacity of the solid.
Opacity
The blending mode used to combine the layer and the solid color.
Blending Mode

Color Correction effects

Using histograms to adjust color
A histogram is a representation of the number of pixels at each luminance value in an image. A histogram that has
nonzero values for each luminance value indicates an image that takes advantage of the full tonal range. A histogram
that doesn't use the full tonal range corresponds to a dull image that lacks contrast.
A common color-correction task is adjusting an image to spread out the pixel values more evenly from left to right
on the histogram, instead of having them bunched up at one end or the other. Applying the Levels effect and
adjusting its Input White and Input Black properties in the histogram is an easy and effective way to accomplish this
task for many images.
Histogram for image that does not use full tonal range