Adobe Premiere Elements 12 - Manual (Page 157)

Every clip in Premiere Elements is composed from three color channels: red, green, and blue. Each channel contains the luminance values for its
respective color. Using the Channel Mixer effect, you can add the values from any of these channels to any of the other channels, for example,
adding the luminance values from the green channel into the red channel. Use this effect to make creative color adjustments not easily achieved
with the other color adjustment tools. Create high-quality grayscale clips by choosing the percentage of the grayscale contributed by each color
channel, create high-quality sepia-tone or other tinted clips, and swap or duplicate channels. You could use this effect, for example, to entirely
replace a noisy blue channel with values taken from, say, a clean green channel.
Each of the properties for the Channel Mixer is labeled with a pair of color names. The word to the left of each hyphen names the property’s
output channel; the word to the right names its input channel. For example, the Red-Green property has the red channel as its output and the
green channel as its input. You can use it to add the luminance values of the green channel to the red channel.
Video clip and its red, blue, and green channels
Channel Mixer properties
A. Output channel B. Input channel C. Value
The value to the right of each property name sets the percentage of the output channel contributed by the specified input channel. This number is
a percentage ranging from -200% to 200%.
The Constant (Const) properties for each output channel allow you to specify a base value to add to that output. For example, a Red-Const value
of 50 will add 50% of full luminance (50% of 255, or about 127) to every pixel in the red output channel.
The Monochrome option creates a grayscale clip from the output channel values. Monochrome is useful for clips that you plan to convert to
grayscale. If you select this option, adjust the channel values, and then deselect this option, you can modify the blend of each channel separately,
creating a hand-tinted appearance.
Mix Channels in a clip
1. Apply the Channel Mixer effect, and then click the Applied Effects button. Expand the Channel Mixer effect and drag any channel’s value to
the left to decrease the channel’s contribution to the output channel. Drag the value to the right to increase the channel’s contribution to the
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