Adobe AFTER EFFECTS CS3 PROFESSIONAL User Manual page 407

AFTER EFFECTS CS3 401
User Guide
If this option is selected, frames beyond a scene change are ignored when surrounding frames are
Scene Detect
analyzed for temporal smoothing.
The effect's transparency. The result of the effect is blended with the original image, with the
Blend With Original
effect result composited on top. The higher you set this value, the less the effect affects the clip. For example, if you
set this value to 100%, the effect has no visible result on the clip; if you set this value to 0%, the original image doesn't
show through.
Expand the More Options category to reveal the following controls:
The range of adjustable tones in the shadows and highlights. Lower
Shadow Tonal Width and Highlight Tonal Width
values restrict the adjustable range to only the darkest and lightest regions, respectively. Higher values expand the
adjustable range. These controls are useful for isolating regions to adjust. For example, to lighten a dark area without
affecting the midtones, set a low Shadow Tonal Width value so that when you adjust the Shadow Amount, you're
lightening only the darkest areas of an image. Specifying a value that is too large for a given image might introduce
halos around strong dark to light edges. The default settings attempt to reduce these artifacts. These halos may occur
if the Shadow or Highlight Amount value is too large; they can also be reduced by decreasing these values.
The radius (in pixels) of the area around a pixel that the effect uses to
Shadow Radius and Highlight Radius
determine whether the pixel resides in a shadow or a highlight. Generally, this value should roughly equal the size of
the subject of interest in the image.
The amount of color correction that the effect applies to the adjusted shadows and highlights. For
Color Correction
example, if you increase the Shadow Amount value, you bring out colors that were dark in the original image; you
may want these colors to be more vivid. The higher the Color Correction value, the more saturated these colors
become. The more significant the correction that you make to the shadows and highlights, the greater the range of
color correction available.
Note: If you want to change the color over the whole image, use the Hue/Saturation effect after applying the
Shadow/Highlight effect.
The amount of contrast that the effect applies to the midtones. Higher values increase the contrast
Midtone Contrast
in the midtones alone, while concurrently darkening the shadows and lightening the highlights. A negative value
reduces contrast.
How much of the shadows and highlights are clipped to the new extreme shadow and
Black Clip, White Clip
highlight colors in the image. Note that setting the clipping values too high reduces detail in the shadows or
highlights. A value between 0.0% and 1% is recommended. By default, shadow and highlight pixels are clipped by
0.1%—that is, the first 0.1% of either extreme is ignored when identifying the darkest and lightest pixels in the image,
which are then mapped to output black and output white. This method ensures that input black and input white
values are based on representative rather than extreme pixel values.
Tint effect
The Tint effect tints a layer by replacing each pixel's color values with a value between the colors specified by Map
Black To and Map White To. Pixels with luminance values between black and white are assigned intermediate values.
Amount To Tint specifies the intensity of the effect.
For more complex tinting, use the Colorama effect.
This effect works with 8-bpc, 16-bpc, and 32-bpc color.