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Adobe After Effects Help
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Image control effects
Use these effects to alter an image's color values.
Change Color
This effect adjusts the hue, saturation, and lightness of a range of colors. Choose the range
by specifying a base color and similarity values. Choose to work from the Corrected Layer,
which shows the results of the Change Color effect, or from the Color Correction Mask,
which shows the areas of the layer that will be changed. White areas in the color correction
mask are transformed the most, and dark areas are transformed the least.
For more information, see the After Effects product section on Adobe's Web site.
Color Balance (HLS)
This effect alters an image's levels of hue, lightness, and saturation. It is 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.
The Hue option specifies the color scheme of the image.
Colorama
This effect colorizes a selected element in an image, and cycles smoothly through the
colors in the new color palette. Use keyframes to animate the colors; for example, make
colors pulse as they follow a gradient path or zoom out of a radial gradient.
Colorama converts the selected channel to grayscale (you can combine channels using
the Add Phase option); then it remaps the grayscale values that you've chosen to a color
palette (Output Cycle) that you've loaded (or created from scratch). It then "wraps" the
grayscale file around the color wheel, mapping the successive colors to the increasingly
lighter grays. When it gets to the white areas of the image, it completes the cycle by
mapping those corresponding pixels to the color at the top of the Output Cycle's color
wheel. You can then animate the cycle, so that in one revolution, each pixel of your layer
travels through the complete color cycle you've chosen.
For more information, see the After Effects product section on Adobe's Web site.
Equalize
This effect alters an image's pixel values to produce a more consistent brightness or color
component distribution. The effect works similarly to the Equalize command in Adobe
Photoshop. Equalization can be performed using either RGB values or the brightness
component. Pixels with 0 alpha (completely transparent) values are not considered, so
masked layers are equalized based on the mask area. Layer quality settings do not affect
Equalize.
For more information, see the After Effects product section on Adobe's Web site.
Gamma/Pedestal/Gain
This effect adjusts the response curve independently for each channel. For pedestal and
gain, a value of 0.0 is completely off, and a value of 1.0 is completely on.
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