User Guide

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Using Help | Contents | Index Back 274
Adobe Premiere Pro Help Applying Effects
Using Help | Contents | Index Back 274
Noise Type Randomly changes the red, green, and blue values of the image’s pixels
individually when Use Color Noise is selected. Otherwise, the same value is added to all
channels.
Clipping Determines whether the noise causes pixel colors to wrap around. When the
color value of a pixel gets as large as it can be, clipping makes it stay at that value. With
unclipped noise, the color value wraps around or starts again at low values. When Clipping
is selected, even 100% noise leaves a recognizable image. If you want a completely
randomized image, turn off Clipping and turn on Color Noise.
Non Red Key
The Non Red Key effect makes the clip’s non-red pixels transparent.
Pinch
The Pinch effect distorts a clip by stretching the image toward the center from the edges.
You can set the percentage of pinching.
Pointillize
The Pointillize effect breaks up the color in a clip into dots, like a pointillist painting, and
uses a white background as a canvas area between the dots. In the Pointillize dialog box,
you can set the cell (dot) size from 3 pixels to 300 pixels.
Polar Coordinates
The Polar Coordinates effect distorts a clip by moving each pixel in the clip’s x,y
coordinate
system to the corresponding position in the polar coordinate system, or the reverse. This
effect produces unusual and surprising distortions that can vary greatly depending on the
image and the controls you select. The standard coordinate system specifies points by
measuring the horizontal distance (x-axis) and the vertical distance (y-axis) from the
origin.The polar coordinate system specifies points by measuring the length of a radius
from the origin and its angle from the x-axis.
Interpolation Specifies the amount of distortion. At 0% there is no distortion.
The following two options are available from the Type of Conversion pop-up menu:
Rect to Polar Moves pixels by using the standard x,y coordinates from each pixel as polar
coordinates. For example, an x,y coordinate of 2,3 becomes a polar coordinate with a
radius of 2 and a degree of 3. Horizontal lines distort into circles and vertical lines into
radial lines.
Polar to Rect Moves pixels by using the polar coordinates from each pixel as the standard
x,y coordinates. For example, a polar coordinate of radius 10 and 45° becomes an x,y
coordinate of 10,45.
Posterize
The Posterize effect specifies the number of tonal levels (or brightness values) for each
channel in an image and maps pixels to the closest matching level. For example, if you
choose two tonal levels in an RGB image, you get two tones for red, two tones for green,
and two tones for blue. Values range from 2 to 255. Although the results of this effect are
most evident when you reduce the number of gray levels in a grayscale image, Posterize
also produces interesting effects in color images.
Using Help | Contents | Index Back 275
Adobe Premiere Pro Help Applying Effects
Using Help | Contents | Index Back 275