Adobe 12040118 - After Effects Standard Tutorial page 392

combined with 0% saturation, which then gives the hue no influence. When you select Saturation Only, the applied saturation values are combined
with 0% hue and 50% lightness.
Invert Inverts (subtracts from 1.0) the output channel values.
Solid Alpha Makes the alpha channel value 1.0 (complete opacity) throughout the layer.
Compound Arithmetic effect
The Compound Arithmetic effect mathematically combines the layer to which it is applied with a control 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
blending modes is usually more effective than using the Compound Arithmetic effect.
This effect works with 8-bpc color.
Second Source Layer The layer to use with the current layer in the given operation.
Operator The operation to perform between the two layers.
Operate On Channels The channels to which the effect is applied.
Overflow Behavior How the effect remaps values that fall outside the grayscale range of 0-255.
Clip Values above 255 are mapped to 255. Values below 0 are mapped to 0.
Wrap Values above 255 and below 0 are wrapped back around into the 0-255 range. For example, a value of 258 wraps around to 2, a
value of 256 wraps around to 0, and a value of -3 wraps around to 253.
Scale The maximum and minimum values are remapped to 255 and 0, and intermediate values are stretched or compressed to fit within
this range.
Stretch Second Source To Fit Scales the second layer to match the size (width and height) of the current layer. If this option is deselected, the
second layer is placed at the current size of its source, aligned with the upper left corner of the source layer.
Blend With Original The transparency of the effect. The result of the effect is blended with the original image, with the effect result composited on
top. The higher you set this value, the less the effect affects the layer. For example, if you set this value to 100%, the effect has no visible result on
the layer; if you set this value to 0%, the original image doesn't show through.
Invert effect
The Invert effect inverts the color information of an image.
This effect works with 8-bpc, 16-bpc, and 32-bpc color.
Original (left), and with effect applied (right)
Channel 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 only a single channel.
RGB/Red/Green/Blue RGB inverts all three of the additive color channels. Red, Green, and Blue each invert an individual color channel.
HLS/Hue/Lightness/Saturation HLS inverts all three of the calculated color channels. Hue, Lightness, and Saturation each invert an
individual color channel.
YIQ/Luminance/In Phase Chrominance/Quadrature Chrominance YIQ inverts all three NTSC luminance and chrominance channels. Y
(luminance), I (in-phase chrominance), and Q (quadrature chrominance) each invert an individual channel.
Alpha Inverts the alpha channel of the image. The alpha channel isn't a color channel; it specifies transparency.
Blend With Original The transparency of the effect. The result of the effect is blended with the original image, with the effect result composited on
top. The higher you set this value, the less the effect affects the layer. For example, if you set this value to 100%, the effect has no visible result on
the layer; if you set this value to 0%, the original image doesn't show through.
Minimax effect
The Minimax effect assigns each channel of a pixel the minimum or maximum value for that channel found within a specified radius.
This effect can be used to enlarge or reduce a matte. For example, a white solid area surrounded by black shrinks one pixel on each side using
Minimum and a radius of 1.
The quality setting of the layer doesn't affect Minimax.
This effect works with 8-bpc and 16-bpc color.
Operation Minimum assigns each channel of a pixel the minimum value for the specified channel within the specified radius. Maximum assigns
each channel of a pixel the maximum value. Minimum Then Maximum performs the Minimum operation and then the Maximum operation.
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