Adobe Premiere Pro CS4 Uživatelský manuál Strana 321

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USING ADOBE PREMIERE PRO CS4
Effects and transitions
Last updated 11/6/2011
Mix color channels in a clip
1 In the Effects panel, click the triangle to expand the Video Effects bin, and then click the triangle to expand the
Adjust bin.
2 Drag the Channel Mixer effect to the clip in a Timeline panel.
Note: If the clip is already selected in a Timeline panel, you can drag the Channel Mixer effect to the Video Effects section
of the Effect Controls panel.
3 Decrease or increase a channel’s contribution to the output channel by doing any of the following to a source color
channel:
Scrub an underlined value to the left or right.
Click an underlined value, type a value between –200% and +200% in the value box, and press Enter (Windows) or
Return (Mac OS).
Click the triangle to expand the Channel Mixer controls, and drag the slider to the left or right.
4 (Optional) Drag the slider, scrub the underlined text, or type a value for the channel’s constant value (Red-Const,
Green-Const, or Blue-Const). This value adds a base amount of a channel to the output channel.
5 (Optional) Select the Monochrome option to create an image containing only gray values. This option achieves this
result by applying the same settings to all the output channels.
More Help topics
Channel Mixer effect” on page 351
Isolate a single color using Color Pass
The Color Pass effect lets you isolate a single color or a range of colors. Adjustments are made in a dialog box showing
the Clip Sample and Output Sample. You can also adjust the Color Pass effect properties in the Effect Controls panel.
If you want to color correct a single color or range of colors in a clip, use the Secondary Color Correction controls in
the Color Correction effects.
1 Drag the Color Pass effect to a clip.
2 In the Effect Controls panel, click the Setup icon for the Color Pass effect.
3 In the Color Pass Settings dialog box, do one of the following to select the color that you want to preserve:
Move the pointer into the Clip Sample (the pointer turns into an eyedropper) and click to select a color.
Click the color swatch, select a color in the Adobe Color Picker, and then click OK to close the Adobe Color Picker.
The selected color appears in the Output Sample.
4 For the Similarity option, drag the slider or enter a value to increase or decrease the color range to be preserved.
5 To reverse the effect, so that all colors except the specified color are preserved, select the Reverse option.
To animate this effect, use the keyframe features in the Effect Controls panel.
More Help topics
Color Pass effect (Windows only)” on page 375
Specify a color or range of colors to adjust” on page 311
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