Difference Matte Key effect A Original image B Background image C Image on

Difference matte key effect a original image b

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Difference Matte Key effect A. Original image B. Background image C. Image on second track D. Final composite image A B C D A B C D
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ADOBE PREMIERE PRO 2.0 User Guide 319 See also “About the Difference Matte Key” on page 365 “To replace a static background behind moving objects” on page 365 Eight-Point, Four-Point, and Sixteen-Point Garbage Matte effects The three Garbage Matte effects aid in cropping out extraneous portions of a shot so that you can apply and adjust a key effect more effectively. The mattes are applied with either four, eight, or 16 adjustment points for more detailed keying. Once you apply the effect, click the Transform icon next to the effect name in the Effect Controls panel. This displays the garbage matte handles in the Program Monitor. To adjust the matte, drag the handles in the Program Monitor or drag the controls in the Effect Controls panel. See also “To mask out objects with garbage mattes” on page 367 Green Screen Key effect The Green Screen Key effect keys out all image pixels that are similar to a standard greenscreen, so that they become transparent. See also “Blue Screen Key and Green Screen Key” on page 362 Image Matte Key effect The Image Matte Key effect keys out areas of a clip’s image based on the luminance values of a still image clip, which serves as a matte. The transparent areas reveal the image produced by clips in lower tracks. You can specify any still image clip in the project to serve as the matte; it does not have to be in the sequence. To use a moving image as the matte, use the Track Matte Key effect instead. See also “Using the Image Matte Key” on page 364 “To composite clips using alpha channels or brightness values” on page 364 Luma Key effect The Luma Key effect removes all the regions of a clip that have a specified luminance or brightness. The clip’s quality setting does not influence the Luma Key effect. When the object from which you want to create a matte has a markedly different luminance value than its background, you can make the background value transparent by keying it out. For example, if you want to create a matte for musical notes on a white background, you can key out the brighter values; the dark musical notes become the only opaque area. See also “About the Luma Key” on page 363
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ADOBE PREMIERE PRO 2.0 User Guide 320 Multiply Key effect The Multiple Key effect multiplies the color values in a clip image with the underlying clip, and divides the result by 255 (the maximum pixel value of 8-bit pixels). The resulting color is never brighter than the original. See also “Multiply Key and Screen Key” on page 363 Non Red Key effect The Non Red Key effect makes the clip’s non-red (blue or green) pixels transparent. See also “Using the Non Red Key” on page 362 RGB Difference Key effect The RGB Difference Key effect creates transparency by removing pixels from a specified color or range of colors.
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