(the middle-gray levels), while leaving the dark and light areas unaffected. The default
gamma setting is 1.0. In the effect’s Settings dialog box, you can adjust the gamma from
0.1 to 2.9.
Garbage Matte
The Garbage Matte effect aids in cropping out extraneous portions of a shot so that you
can apply and adjust a key effect more effectively.
Gaussian Blur
The Gaussian Blur effect blurs and softens the image and eliminates noise. You can
specify
that the blur is horizontal, vertical, or both. (
Gaussian
refers to the bell-shaped curve that is
generated by mapping the color values of the affected pixels.)
Gaussian Sharpen
The Gaussian Sharpen effect sharpens a clip by a large amount; the effect is similar to
that
of choosing the Sharpen effect several times. Keyframes cannot be applied to this effect.
Ghosting
The Ghosting effect overlays transparencies of the immediately preceding frames on the
current frame. This effect can be useful, for example, when you want to show the motion
path of a moving object, such as a bouncing ball. Keyframes cannot be applied to this
effect.
Using Help | Contents | Index Back 270
Adobe Premiere Pro Help Applying Effects
Using Help | Contents | Index Back 270
Green Screen Key
The Green Screen Key effect keys out all image pixels that are similar to a standard
greenscreen,
so that they become transparent.
Horizontal Flip
The Horizontal Flip effect reverses each frame in a clip from left to right; however, the clip
still plays in a forward direction.
Horizontal Hold
The Horizontal Hold effect skews the frames to the left or to the right; the effect is similar
to the horizontal hold setting on a television set. Drag the slider to control the clip’s slant.
Image Matte Key
The Image Matte Key effect keys out areas of a clip’s image based on the luminance
values
of a still image clip, which serves as a matte. The transparent areas reveal the image
produced by clips in lower tracks. You can specify any still image clip in the project to
serve
as the matte; it does not have to be in the sequence. To use a moving image as the matte,
use the Track Matte Key effect instead.
Invert
The Invert (video) effect inverts the color information of an image.
Channel
Specifies which channel or channels to invert. Each group of items operates in a
particular color space, inverting either the entire image in that color space or just a single
channel. RGB consists of three additive color channels: red, green, and blue. HLS consists
of three calculated color channels: hue, lightness, and saturation. YIQ is the NTSC
luminance and chrominance color space, where Y is the luminance signal, and I and Q are
the in-phase and quadrature chrominance signals. Alpha, not a color space, provides a
