320
USING ADOBE PREMIERE PRO
Effects and transitions
Last updated 1/16/2012
Adjust luminance using levels
The Fast Color Corrector and the Three-way Color Corrector effects have Input Levels and Output Levels controls to
adjust the luminance in a clip. The controls are similar to the ones in Photoshop’s Levels dialog box. In the Fast Color
Corrector effect, control settings are applied to all three color channels in a clip. The Three-way Color Corrector effect
lets you apply the levels adjustments to the entire tonal range in the clip, a specific tonal range, or specific range of
colors.
1
(Optional) Set up your workspace for color correction. When adjusting luminance, it might be best to view the YC
Waveform in a Reference Monitor ganged to the Program Monitor.
2
In the Effects panel, click the triangle to expand the Video Effects bin, and then click the triangle to expand the
Color Correction bin.
3
Drag the Fast Color Corrector effect or the Three-way Color Corrector to the clip in a Timeline panel.
If the clip is already selected in a Timeline panel, you can drag the effect to the Video Effects area of the Effect Controls
panel.
4
In the Effect Controls panel, click the triangle to expand the Fast Color Corrector or Three-way Color Corrector
controls.
5
(Optional) Do any of the following to set preview options:
•
To view only the luminance values in a clip, choose Luma from the Output menu. This option only affects the
preview in the Program Monitor, it doesn’t remove the color from the video.
•
To display a before and after view of the clip in one monitor, select the Show Split View option. You can specify
whether the split view is horizontal or vertical by choosing from the Layout menu. You can also adjust the relative
proportion of the before and after views.
6
(Optional for the Three-way Color Corrector only) Do any of the following:
•
To restrict your correction to a specific tonal range, choose Shadows, Midtones, or Highlights from the Tonal
Range menu. Choosing Master applies correction to the entire tonal range of the image. If necessary, use the Tonal
Range Definition controls to define the different tonal ranges. You can choose Tonal Range from the Output menu
to view a tritone preview of the tonal ranges in the Program Monitor.
•
To restrict your adjustments to a color or range of colors, click the triangle to expand the Secondary Color
Correction controls. Define the color or color range using the Eyedropper tool, slider controls or enter numeric
values. See also “
Specify a color or range of colors to adjust
” on page 324.
7
Use the Output Levels slider controls to set the maximum black and white levels:
Black Output slider
Controls the resulting output of the shadows. The default is 0, where the pixels are completely
black. Moving the slider to the right specifies a lighter value for the darkest shadow.
White Output slider
Controls the resulting output of the highlights. The default is 255, where the pixels are completely
white. Moving the slider to the right specifies a darker value for the brightest highlight.
If the YC Waveform is displayed in a Reference Monitor, adjust the Black Output and White Output sliders so the
maximum black and white levels of the waveform are within 7.5 to 100 IRE. This ensures that the levels are within
broadcast standards.
Содержание 25520388 - Premiere Pro - PC
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