Adobe 25520388 User Guide - Page 394

Noise & Grain effects, Dust & Scratches effect, Median effect

Page 394 highlights

USING ADOBE PREMIERE PRO 389 Effects and transitions Matte Luma Composites using the track matte clip's luminance values. 10 (Optional) Select the Reverse option to invert the values of the track matte clip. To retain the original colors in the superimposed clip, use a grayscale image for the matte. Any color in the matte removes the same level of color from the superimposed clip. 11 (Optional) If you're animating the Track Matte, move the current-time indicator either in the Effect Controls panel or Timeline panel and change the Track Matte Key settings. A new keyframe appears in the Effect Controls timeline when you change the settings. You can also adjust the interpolation between keyframes by editing the keyframe graph. Repeat this step as needed. More Help topics "Adding, navigating, and setting keyframes" on page 415 "Modify keyframe values" on page 420 Noise & Grain effects Dust & Scratches effect The Dust & Scratches effect reduces noise and defects by changing dissimilar pixels within a specified radius to be more like their neighboring pixels. To achieve a balance between sharpness of the image and hiding defects, try various combinations of radius and threshold settings. Original image with scratches (left), enlarged view of scratches (center), and scratches removed with loss of clarity (right) Radius How far the effect searches for differences among pixels. High values make the image blurry. Use the smallest value that eliminates the defects. Threshold How different pixels can be from their neighbors without being changed by the effect. Use the highest value that eliminates the defects. Median effect The Median effect replaces each pixel with a pixel that has the median color value of neighboring pixels with the specified Radius. At low Radius values, this effect is useful for reducing some types of noise. At higher Radius values, this effect gives an image a painterly appearance. Original (left), and with effect applied (right) Last updated 1/16/2012

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389
USING ADOBE PREMIERE PRO
Effects and transitions
Last updated 1/16/2012
Matte Luma
Composites using the track matte clip’s luminance values.
10
(Optional) Select the Reverse option to invert the values of the track matte clip.
To retain the original colors in the superimposed clip, use a grayscale image for the matte. Any color in the matte
removes the same level of color from the superimposed clip.
11
(Optional) If you’re animating the Track Matte, move the current-time indicator either in the Effect Controls panel
or Timeline panel and change the Track Matte Key settings.
A new keyframe appears in the Effect Controls timeline when you change the settings. You can also adjust the
interpolation between keyframes by editing the keyframe graph. Repeat this step as needed.
More Help topics
Adding, navigating, and setting keyframes
” on page
415
Modify keyframe values
” on page
420
Noise & Grain effects
Dust & Scratches effect
The Dust & Scratches effect reduces noise and defects by changing dissimilar pixels within a specified radius to be more
like their neighboring pixels. To achieve a balance between sharpness of the image and hiding defects, try various
combinations of radius and threshold settings.
Original image with scratches (left), enlarged view of scratches (center), and scratches removed with loss of clarity (right)
Radius
How far the effect searches for differences among pixels. High values make the image blurry. Use the smallest
value that eliminates the defects.
Threshold
How different pixels can be from their neighbors without being changed by the effect. Use the highest value
that eliminates the defects.
Median effect
The Median effect replaces each pixel with a pixel that has the median color value of neighboring pixels with the
specified Radius. At low Radius values, this effect is useful for reducing some types of noise. At higher Radius values,
this effect gives an image a painterly appearance.
Original (left), and with effect applied (right)