Walker Effects Manual

Channel Viewer

Channel Viewer is a utility for pulling channels out of a layer. You can specify which channel, whether it is in color, inverted, and whether or not it is affected by the alpha channel. This tool is great for quickly inspecting layers, extracting mattes, and even creating interesting color effects.

Channel

Channel Viewer extracts the selected Channel from the layer upon which it is applied. There is a wide range of choices when it comes to channels, and each provides its own unique perspective into the source layer. Most of the standard color models are available, including YUV, LAB, and CMYK.

Invert

Any Channel can be inverted. The invert operation is calculated before premultiplying or coloring.

Alpha Mode

Since Channels are typically extracted from just the color channels, you may wish to also include the Alpha channel. There are three options in regards to working with the alpha channel:

Premultiply

This multiplies the channel with the alpha, in effect combining them. Premultiply is calculated after Invert.

Leave As Is

With this option, Channel Viewer will not change the alpha channel at all. Whatever results it produces in the color channels will be done independently of the alpha.

Ignore

If Ignore is selected, the alpha channel gets filled solid white. This is useful when you need to access the whole color value of each pixel, regardless of the alpha value. Aesthetically, this is the opposite of Premultiply.

In Color

Many Channels have the ability to be displayed in color. Even though individual channels really have no color, this pseudo coloring can be helpful in better understanding what the channel represents. Viewing channels In Color also can provide helpful color corrections and tints. For channels that have no logical color association, the In Color checkbox will be disabled.

Blend With Original

Use this slider to blend the result of the effect with the original input layer. If Blend With Original is set to 100, the effect will not render.