Table of Contents
Advertisement
Original (left), and with effect applied (right)
Specifies the duration of time surrounding the current frame, from which After Effects deter-
Temporal Smoothing
mines the amount of correction needed for the current frame relative to the surrounding frames. For example, if
Temporal Smoothing is set to 2 seconds, After Effects analyzes all frames 1 second before and after a given frame to
determine the appropriate level of adjustment for that frame. If Temporal Smoothing is set to 0, each frame is
analyzed independently of surrounding frames. Temporal Smoothing can result in smoother-looking corrections
over time.
Sets the Temporal Smoothing control to ignore frames in different scenes.
Scene Detect
Specify how much to clip black and white pixels. A value between 0.0% and 1% is recom-
Black Clip, White Clip
mended. By default, After Effects clips the black and white pixels by 0.1%—that is, it ignores the first 0.1% of either
extreme when identifying the lightest and darkest pixels in the image.
Identifies an average nearly neutral color in the frame and then adjusts the gamma values to
Snap Neutral Midtones
make the color neutral.
Specifies the effect's transparency. The higher you set this value, the less the color, contrast, or
Blend With Original
levels are affected. For example, if you set this value to 100%, the effect has no affect on the layer.
Auto Contrast effect
The Auto Contrast effect adjusts the overall contrast and mixture of colors in a layer automatically. Because it does
not adjust channels individually, Auto Contrast does not introduce or remove color casts. It maps the lightest and
darkest pixels in the image to white and black, which makes highlights appear lighter and shadows appear darker.
When identifying the lightest and darkest pixels in an image, Auto Contrast clips the white and black pixels by
0.5%—that is, it ignores the first 0.5% of either extreme. This ensures that white and black values are based on repre-
sentative rather than extreme pixel values.
See "Auto Color effect" on page 402 for explanations of this effect's controls.
This effect works with 8-bpc and 16-bpc color.
Original (left), and with effect applied (right)
Auto Levels effect
The Auto Levels effect automatically sets highlights and shadows by defining the lightest and darkest pixels in each
color channel as white and black and then redistributes intermediate pixel values proportionately. Because Auto
Levels adjusts each color channel individually, it may remove or introduce color casts.
ADOBE AFTER EFFECTS 7.0
403
User Guide
Hide quick links:
Advertisement
Table of Contents
