Compound Arithmetic Effect; Invert Effect - Adobe PREMIERE PRO 2 Manual

Compound Arithmetic effect

The Compound Arithmetic effect mathematically combines the layer to which it is applied with another layer. The
Compound Arithmetic effect is intended only to provide compatibility with projects created in earlier versions of
After Effects that use the Compound Arithmetic effect. Using layer blending modes is usually more effective than
using the Compound Arithmetic effect.
Compound Arithmetic effect: Original images (left and center) and with Compound Arithmetic effect applied (right)
Adjust the following controls for the Compound Arithmetic effect:
Specifies the video track to use with the current layer in the given operation.
Second Source Layer
Specifies the operation to perform between the two layers.
Operator
Specifies the channels to which the effect is applied.
Operate On Channels
Specifies how pixel values that exceed the allowed range are treated:
Overflow Behavior
•
Indicates that the values are limited to the allowed range.
Clip
•
Indicates that values exceeding the allowed range wrap around from full on to full off, and vice versa.
Wrap
•
Indicates that the maximum and minimum values are calculated and the results are stretched down from
Scale
that full range to the range of allowable values.
Stretch Second Source To Fit
option is deselected, the second layer is placed at its source's current size, aligned with the upper left corner of the
source layer.
Adjusts the opacity of the second source layer so it blends with the original layer.
Blend With Original

Invert effect

The Invert (video) effect inverts the color information of an image. The Invert effect has the following settings:
Specifies which channel or channels to invert. Each group of items operates in a particular color space,
Channel
inverting either the entire image in that color space or just a single channel.
•
Uses all of three additive color channels: red, green, and blue or an individual color channel
RGB/Red/Green/Blue
to specify the inverted areas of the image.
•
HLS/Hue/Lightness/Saturation
calculated color channel to specify the inverted areas of the image.
•
YIQ/Luminance/In Phase Chrominance/Quadrature Chrominance
color space, where Y is the luminance signal, I is the in-phase chrominance signal, and Q is the quadrature chromi-
nance signals or the individual components of the color space to specify the inverted areas of the image.
•
Inverts the alpha channel of the image. Alpha is not a color space.
Alpha
Combines the inverted image with the original. You can apply a fade to the inverted image.
Blend With Original
Scales the second layer to match the size (width and height) of the current layer. If this
Uses the three calculated color channels: hue, lightness, and saturation or one
Uses the NTSC luminance and chrominance
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User Guide