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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

USING ADOBE PREMIERE PRO

390

Effects and transitions

Noise effect

The Noise effect randomly changes pixel values throughout the image.

Amount Of Noise The amount of noise to add.

Noise Type Use Color Noise to add random values to the red, green, and blue channels individually. Otherwise, the same random value is added to all channels for each pixel.

Clipping Clips color channel values. Deselecting this option causes more apparent noise.

Noise Alpha effect

The Noise Alpha effect adds noise to the alpha channel.

Noise The type of noise. Unique Random creates equal amounts of black and white noise. Squared Random creates high-contrast noise. Uniform Animation creates animated noise, and Squared Animation creates animated highcontrast noise.

Amount The magnitude of the noise.

Original Alpha How to apply the noise to the alpha channel:

•Add Produces equal amounts of noise in the transparent and opaque areas of the clip.

•Clamp Produces noise in the opaque areas only.

•Scale Increases the amount of noise proportionate to the level of opacity and produces no noise in 100% transparent areas.

•Edges Produces noise only in partially transparent areas, such as the edge of the alpha channel.

Overflow How the effect remaps values that fall outside the grayscale range of 0-255:

•Clip Values above 255 are mapped to 255. Values below 0 are mapped to 0.

•Wrap Back Values above 255 or below 0 are reflected back into the 0-255 range. For example, a value of 258 (255+3) is reflected to 252 (255-3), and a value of -3 is reflected to 3.

•Wrap Values above 255 and below 0 are wrapped back around into the 0-255 range. For example, a value of 258 wraps around to 2, a value of 256 wraps around to 0, and a value of -3 wraps around to 253.

Random Seed An input value to the random number generator for the noise. This control is active only if you choose Uniform Random or Squared Random.

To produce flashing noise, animate the Random Seed control. To create smoothly animated noise, animate the Noise Phase value.

Noise Phase Specifies the placement of noise. This control is active only if you choose Uniform Animation or Squared Animation.

Noise Options (Animation) How noise is animated.

•Cycle Noise Produces a cycle of noise that plays through once in the specified amount of time.

•Cycle (In Revolutions) Specifies the numbers of revolutions of the Noise Phase that the noise cycles through before it repeats (available only if Cycle Noise is selected).

Alter the timing of the Noise Phase keyframes to adjust the speed of the Noise Phase cycles.

More Help topics

“Adding, navigating, and setting keyframes” on page 415

Last updated 1/16/2012