way to invert the alpha channel of the image.
Blend with Original
Combines the inverted image with the original. You can apply a fade
to the inverted image.
Lens Distortion
The Lens Distortion effect simulates a distorted lens through which the clip is viewed.
Curvature
Changes the curvature of the lens. Specify a negative value to make the image
concave, or a positive value to make the image convex.
Vertical and Horizontal Decentering
Displaces the focal point of the lens, making the
image bend and smear. At extreme settings, the image wraps in on itself.
Vertical and Horizontal Prism FX
Creates a result similar to vertical and horizontal
decentering, except that at extreme values the image doesn’t wrap in on itself.
Fill color
Specifies the background color.
Fill alpha channel
When selected, makes the background transparent so that underlying
tracks are visible. To access this check box from the Effect Controls window, click Setup.
Lens Flare
The Lens Flare effect simulates the refraction caused by shining a bright light into the
camera lens.
Brightness
Specifies the percentage of brightness. Values can range from 10% to 300%.
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Adobe Premiere Pro Help Applying Effects
Using Help | Contents | Index Back 271
Flare Center
Specifies a location for the center of the flare.
Lense Type
Selects the type of lens to simulate.
Levels
The Levels effect manipulates the brightness and contrast of a clip. It combines the
functions of the Color Balance, Gamma Correction, Brightness & Contrast, and Invert
effects.
The Levels Settings dialog box displays a histogram of the current frame. The
x
-axis of the
histogram represents brightness values from darkest (0) at the far left to brightest (255) at
the far right; the
y
-axis represents the total number of pixels with that value.
To adjust Levels:
1
From the menu at the top of the dialog box, choose whether you want tonal adjustments
to apply to one of the three color channels that make up the clip (red, green, or
blue), or choose RGB Channels to adjust all channels at once.
2
Use the slider controls directly below the histogram to increase contrast. Drag the black
triangle to the right to increase the shadows. Drag the white triangle to the left to increase
the highlights. Drag the gray triangle to control the midtones. You can also type the values
directly into the Input Levels text boxes.
3
Use the Output Levels slider controls at the bottom of the dialog box to reduce
contrast. Drag the black triangle to the right to eliminate the darkest values in the clip.
Drag the white triangle to the left to eliminate the brightest values in the clip. You can also
type the values directly into the Output Levels text boxes.
4
If desired, use the Load and Save buttons in the dialog box to save Level settings in a
separate file, which you can then load for reuse in other instances of the effect.
Lightning
The Lightning effect creates lightning bolts and other electrical effects, including a Jacob's
Ladder appearance (as seen in old horror movies) between two specified points in a clip
image. The Lightning effect is automatically animated without keyframes across the clip’s
time range.
Start Point, End Point
Specify where the lightning begins and ends.
