Adobe Premiere Pro CS6 - Manual (Page 413)

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in the box to toggle the effect off.
Color Balance (RGB) effect
The Color Balance (RGB) effect changes the amount of red, green, and blue in a clip.
Color Pass effect (Windows only)
The Color Pass effect converts a clip to grayscale, with the exception of a single specified color. Use the Color Pass effect to highlight a particular
area of a clip. For example, in a clip of a basketball game, you could highlight the basketball by selecting and preserving its color, while keeping
the rest of the clip displayed in grayscale. Note, however, that with the Color Pass effect, you can isolate only colors, not objects within the clip.
Color Replace effect (Windows only)
The Color Replace effect replaces all occurrences of a selected color with a new color, preserving any gray levels. Using this effect, you could
change the color of an object in an image by selecting it and then adjusting the controls to create a different color.
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 10. In
the effect’s Settings dialog box, you can adjust the gamma from 1 to 28.
Keying effects
Alpha Adjust effect
Use the Alpha Adjust effect in place of the Opacity effect when you need to change the default render order of Fixed effects. Change the opacity
percentage to create levels of transparency.
The following Alpha Adjust effect settings let you interpret the alpha channel in the clip:
Ignore Alpha Ignores the alpha channel of the clip.
Invert Alpha Reverses the transparency and opaque areas of the clip.
Mask Only Applies the effect only to a masked area.
Blue Screen Key effect (Windows only)
The Blue Screen Key effect creates transparency from true chroma blue. Use this key to key out well-lit blue screens when creating composites.
The following Blue Screen Key effect settings are adjusted in the Effect Controls panel:
Threshold Sets the levels of blue that determines transparent areas in a clip. Dragging the slider to the left increases the amount of transparency.
Use the Mask Only option to view black (transparent) areas as you drag the Threshold slider.
Cutoff Sets the opacity of nontransparent areas specified by the Threshold setting. Dragging the Cutoff slider to the right increases the opacity.
Use the Mask Only option to view white (opaque) areas as you drag the Cutoff slider.
Smoothing Specifies the amount of anti-aliasing (softening) applied to the boundary between transparent and opaque regions. Choose None to
produce sharp edges, with no anti-aliasing. This option is useful when you want to preserve sharp lines, such as those in titles. Choose Low or
High to produce different amounts of smoothing.
Mask Only Displays only the clip’s alpha channel. Black represents transparent areas, white represents opaque areas, and gray represents
partially transparent areas.
Subject is photographed against blue background (left). Blue Screen Key effect is applied (right) to superimpose subject over underlying track.
For more information about using blue screen and green screen effects, see the Metacafe website .
Chroma Key effect (Windows only)
The Chroma Key effect keys out all image pixels that are similar to a specified key color. When you key out a color value in a clip, that color or
range of colors becomes transparent for the entire clip. Control the range of transparent colors by adjusting the tolerance level. You can also
feather the edges of the transparent area to create a smooth transition between the transparent and opaque areas.
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