Adobe PREMIERE 5, Руководство пользователя, Страница: 275 / 404

267 ADOBE PREMIERE 5.0
User Guide
Using the Non-Red key
The Non-Red key creates transparency from green or blue backgrounds. It is similar to the
Blue Screen and Green Screen keys but also lets you blend two clips. In addition, the Non-Red
key helps reduce fringing around the edges of non-transparent objects. The Non-Red key is
recommended for keying out green screens when you need to control blending or when you
are not able to produce satisfactory results with the Blue Screen or Green Screen keys.
Threshold
Drag to the left until the blue or green screen is made transparent.
Cutoff
Drag to the right until the opaque area reaches a satisfactory level.
Blend Drag to blend the image with any underlying image.
Using the Luminance key
The Luminance key creates transparency for darker values in the image, leaving brighter colors
opaque. Like the Multiply and Screen keys, it is most effective when the image that you are
keying contains highly contrasting dark and light areas. Use the Luminance key to create subtle
superimposing or to key out dark areas.
Threshold
Specifies the range of darker values that will become transparent. Higher values
increase the range of transparency.
Cutoff
Sets the opacity of areas that have been specified by the Threshold slider. Higher values
increase transparency.
Using the Multiply and Screen keys
The Multiply and Screen keys use an underlying image as a map to determine what part of the
keyed image to make transparent. The Multiply key creates transparency in the areas of the
image that correspond to the bright areas in the underlying image. Conversely, the Screen key
creates transparency in the areas that correspond to the dark areas of the underlying image.
Use these keys to create subtle superimposing, when the underlying image contains highly
contrasting elements.
Cutoff
Drag to the right until the opaque area reaches a satisfactory level. Higher values
produce less transparency.
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