Adobe After Effects CS3 - Manual (Page 395)

AFTER EFFECTS CS3
User Guide
390
Broadcast Colors effect
Note: 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 following folder:
Adobe After Effects CS3/Additional Documentation/Color Finesse 2.
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 will be affected by the Broadcast Colors effect at the current settings.
Note: 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 ensures that color values
between 0.0 and 1.0 in your working color space are converted to broadcast-safe values. (See “Broadcast-safe colors” on
page 250.)
This effect works with 8-bpc color.
Broadcast Locale 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 Make Color Safe How to reduce signal amplitude:
• Reduce Luminance Reduces a pixel’s brightness by moving it toward black. This setting is the default.
• Reduce Saturation Moves the pixel’s color 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.
Maximum Signal 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.
View 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.
Hue Transform The amount, in degrees, to adjust hue.
Lightness Transform Positive values brighten the matched pixels; negative values darken them.
Saturation Transform Positive values increase saturation of matched pixels (moving toward pure color); negative
values decrease saturation of matched pixels (moving toward gray).
Color To Change The central color in the range to be changed.
Matching Tolerance How much colors can differ from Color To Change and still be matched.
Matching Softness The amount that unmatched pixels are affected by the effect, in proportion to their similarity to
Color To Change.
Match Colors Determines the color space in which to compare colors to determine similarity. RGB compares colors
in an RGB color space. Hue compares the hues of colors, ignoring saturation and brightness—so bright red and light