Adobe After Effects - Manual (Page 618)

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Note:
Note:
Broadcast Locale
How To Make Color Safe
Reduce Luminance
Reduce Saturation
Maximum Signal Amplitude (IRE)
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Hue Transform
Lightness Transform
Brightness & Contrast effect
The Brightness & Contrast effect adjusts the brightness and contrast of an entire layer (not individual channels). The default value of 0.0 indicates
that no change is made. Using the Brightness & Contrast effect is the easiest way to make simple adjustments to the tonal range of the image. It
adjusts all pixel values in the image at once—highlights, shadows, and midtones.
This effect works with 8-bpc, 16-bpc, and 32-bpc color.
Rich Young collects tutorials and resources about the Brightness & Contrast effect and alternatives to it on his After Effects Portal website .
Broadcast Colors effect
The Color Finesse plug-in included with After Effects includes excellent tools that can help you keep your colors within the broadcast-safe
range. For more information, see the Color Finesse documentation in the Color Finesse subfolder in the Plug-ins folder. (See Plug-ins.)
The Broadcast Colors effect alters pixel color values to keep signal amplitudes within the range allowed for broadcast television.
Use the Key Out Unsafe and Key Out Safe settings for How To Make Color Safe to determine which portions of the image the Broadcast Colors
effect affects at the current settings.
A more reliable way to keep colors within the broadcast-safe range for your output type is to use color management features to set the
output color profile accordingly, such as to SDTV (Rec. 601 NTSC). This method ensures that color values in the range 0.0–1.0 in your working
color space are converted to broadcast-safe values. (See Broadcast-safe colors.)
This effect works with 8-bpc color.
The broadcast standard for your intended output. NTSC (National Television Standards Committee) is the North American
standard and is also used in Japan. PAL (Phase Alternating Line) is used in most of Western Europe and South America.
How to reduce signal amplitude:
Reduces the brightness of a pixel by moving it toward black. This setting is the default.
Moves the color of a pixel toward a gray of similar brightness, making the pixel less colorful. For the same IRE level,
reducing saturation alters the image more noticeably than does reducing luminance.
The maximum amplitude of the signal in IRE units. A pixel with a magnitude above this value is altered. The
default is 110. Lower values affect the image more noticeably; higher values are more risky.
Change Color effect
The Change Color effect adjusts the hue, lightness, and saturation of a range of colors.
This effect works with 8-bpc and 16-bpc color.
Corrected Layer shows the results of the Change Color effect. Color Correction Mask shows a grayscale matte that indicates the areas of
the layer that will be changed. White areas in the color correction mask are changed the most, and dark areas are changed the least.
The amount, in degrees, to adjust hue.
Positive values brighten the matched pixels; negative values darken them.
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