Adobe AFTER EFFECTS CS3 PROFESSIONAL User Manual page 546

AFTER EFFECTS CS3 540
User Guide
The white point used for the layer in After Effects.
Internal White Point
Increase or decrease Gamma to lighten or darken midtones, respectively.
Gamma
The rolloff value used to correct bright highlights. If adjusting the brightest areas makes the rest of
Highlight Rolloff
the image appear too dark, use Highlight Rolloff to adjust these bright highlights. If highlights appear as white
blotches, increase Highlight Rolloff until details are visible. An image with high contrast may require a high rolloff
value.
See also
"Importing Cineon sequences" on page 92
"Set the color depth" on page 234
Color Profile Converter effect
The Color Profile Converter effect converts a layer from one color space to another by specifying input and output
profiles.
In most cases, you should use automatic color management features to convert from one color space to another,
rather than using the Color Profile Converter to manually do the conversions.
Important: In general, you should either work with color management features or use the Color Profile Converter—not both.
The profiles you select are embedded in the project, so you can use them even if you transfer the project to a
computer that doesn't have the same profiles. When converting from one color space to another, you can specify how
After Effects handles the color conversion by selecting a rendering intent. You can also choose whether to linearize
the input or output profile.
This effect works with 8-bpc, 16-bpc, and 32-bpc color.
To convert the color profile of the layer, select a color profile from the Input Profile menu. Select Project Working
Space to use the profile specified in the project settings (File > Project Settings). To linearize the input profile, select
the Linearize Input Profile option. Then select an output profile from the Output Profile menu. To linearize the
output profile, select the Linearize Output Profile. In the Intent menu, select a rendering intent.
Rendering intent options determine how source colors are adjusted. For example, colors that fall inside the desti-
nation gamut may remain unchanged, or they may be adjusted to preserve the original range of visual relationships
when translated to a smaller destination gamut.
The result of choosing a rendering intent depends on the graphical content of an image and on the profiles used to
specify color spaces. Some profiles produce identical results for different rendering intents.
When specifying a rendering intent, you can choose to use black point compression. Black point compression
ensures that the shadow detail in the image is preserved by simulating the full dynamic range of the output device.
The following rendering intents are available for the Color Profile Converter effect:
Attempts to preserve the visual relationship between colors so it's perceived as natural to the human eye,
Perceptual
even though the color values themselves may change. This intent is suitable for images with many of out-of-gamut
colors.
Attempts to produce vivid colors in an image at the expense of color accuracy. This rendering intent is
Saturation
suitable for images, such as graphic logos, in which bright saturated colors are more important than the exact
relationship between colors.