Adobe 65021048 User Guide - Page 345
Noise effect, Noise Alpha effect, Radius, Threshold, Amount, oise Type, Clipping, riginal Alpha, Clamp
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ADOBE PREMIERE PRO CS3 339 User Guide 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. 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. April 1, 2008
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