Adobe PREMIERE PRO 2, Руководство пользователя, Страница: 294 / 448

ADOBE PREMIERE PRO 2.0
User Guide
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Shadow Tonal Width and Highlight Tonal Width
Specify the range of adjustable tones in the shadows and highlights.
Lower values restrict the adjustable range to only the darkest and lightest regions, respectively. Higher values expand
the adjustable range. These controls are useful for isolating regions to adjust. For example, to lighten a dark area
without affecting the midtones, set a low Shadow Tonal Width value so that when you adjust the Shadow Amount,
you are lightening only the darkest areas of an image.
Shadow Radius and Highlight Radius
Specify the size (in pixels) of the area around a pixel that the effect uses to
determine whether the pixel resides in a shadow or a highlight. Generally, this value should roughly equal the size of
the subject of interest in your footage.
Color Correction
Specifies the degree of color correction that the effect applies to the adjusted shadows and
highlights. The higher the value, the more saturated the colors become. The more significant the correction that you
make to the shadows and highlights, the greater the range of color correction available.
Note:
If you want to change the color over the whole image, use the Hue/Saturation effect after applying the
Shadow/Highlight effect.
Midtone Contrast
Specifies the degree of contrast that the effect applies to the midtones. Higher values increase the
contrast in the midtones alone, while concurrently darkening the shadows and lightening the highlights.
Black Clip and White Clip
Specify how much the effect clips the shadows and highlights to the new extreme shadow
(level 0) and highlight (level 255) colors in the image. Larger values produce an image with greater contrast.
Threshold effect
The Threshold effect lets you convert grayscale or color images to high-contrast, black-and-white images. Specify a
certain level as a threshold; all pixels lighter than the threshold are converted to white and all pixels darker to black.
Threshold effect: Original image (left) and with variations of the Threshold effect applied (center and right)
Blur and Sharpen effects
Antialias effect
The Antialias effect blends the edges between areas of highly contrasting colors. When blended, colors create inter-
mediate shades that make transitions between dark and light areas appear more gradual.
Camera Blur effect
The Camera Blur effect simulates an image leaving the focal range of the camera, blurring the clip. For example, by
setting keyframes for the blur, you can simulate a subject coming into or going out of focus, or the accidental
bumping of the camera. Drag the slider to specify a blur amount for the selected keyframe; higher values increase
the blur.