Using Compound RGB Arithmetic

Use Compound RGB Arithmetic to apply specific mathematical operations to the separate Red, Green, and Blue channels of your layer using another operator as a source. Each channel has a separate Operator, Layer, and Input Channel list.

To apply a Compound RGB Arithmetic filter:

1. Select the layer.
2. Choose Operators | Channel | Compound RGB Arithmetic.

The Compound RGB Arithmetic Controls panel appears.

The Compound RGB Arithmetic Controls panel contains the following elements.

Operator

Specifies which mathematical operation is applied. For a complete list of Operator options, see Operator List Options.

Operators are available for Red, Green, and Blue.

Layer

Specifies the operator to be used as a source for the mathematical operations. To remove a layer, click the appropriate Layer button, and then click the None button in the Operator Picker dialog.

Layer controls are available for Red, Green, and Blue.

Input Channel

Specifies which channel of the source layer is used.

Input channel controls are available for Red, Green, and Blue.

Blend

Specifies the percentage amount for which the channel effect is visible over the original layer. Values below 100% allow you to see the original layer.