Adobe PREMIERE PRO 2, Руководство пользователя, Страница: 322 / 448

ADOBE PREMIERE PRO 2.0
User Guide
316
See also
“To replace a color” on page 274
Equalize effect
The Equalize effect alters an image’s pixel values to produce a more consistent brightness or color component distri-
bution. The effect works similarly to the Equalize command in Adobe Photoshop. Equalization can be performed
using either RGB values or the brightness component. Pixels with 0 alpha (completely transparent) values are not
considered, so masked layers are equalized based on the mask area. Layer quality settings do not affect Equalize.
Equalize
Specifies which equalization method to use:
•
RGB
Equalizes the image based on red, green, and blue components.
•
Brightness
Equalizes the image based on the brightness of each pixel.
•
Photoshop Style
Equalizes by redistributing the brightness values of the pixels in an image so that they more
evenly represent the entire range of brightness levels.
Amount To Equalize
Specifies how much to redistribute the brightness values. At 100%, the pixel values are spread
as evenly as possible, while lower percentages redistribute fewer pixel values.
Gamma Correction effect
The Gamma Correction effect lightens or darkens a clip without substantially changing the shadows and highlights.
It does this by changing the brightness levels of the midtones (the middle-gray levels), while leaving the dark and
light areas unaffected. The default gamma setting is 1.0. In the effect’s Settings dialog box, you can adjust the gamma
from 0.1 to 2.8.
PS Arbitrary Map effect
The PS Arbitrary Map effect applies a Photoshop arbitrary map file to a clip. An arbitrary map adjusts the brightness
levels of an image, remapping a specified brightness range to darker or brighter tones. In the Curves dialog box in
Photoshop, you can create an arbitrary map file for the entire image or for individual channels.
Note:
The PS Arbitrary Map effect is intended only to provide compatibility with files created in earlier versions of After
Effects that use the Arbitrary Map effect. Otherwise, use the Curves effect.
When loaded into Adobe Premiere Pro, the specified arbitrary map is applied to the clip or to one or more channels
of the clip, depending on how it was created. If you do not select an arbitrary map, Adobe Premiere Pro applies the
default map (linear distribution of brightness) to the layer
Adjust the following controls for the PS Arbitrary Map effect:
Phase
Cycles through the arbitrary map. Increasing the phase shifts the arbitrary map to the right (as viewed in the
Curves dialog box); decreasing the phase shifts the map to the left.
Apply Phase Map To Alpha
Applies the specified map and phase to the clip’s alpha channel. If the specified map does
not include an alpha channel, Adobe Premiere Pro uses the default map (linear distribution of brightness) for the
alpha channel.
To apply a Photoshop arbitrary map
1
Apply the PS Arbitrary Map effect to a clip in a sequence.