User Manual

Resetting the RGB Mixer
Clicking the Reset button at the top right-hand corner of the RGB Mixer resets each slider to its
default position, where Red = 1.00 for Red output, Green = 1.00 for Green output, Blue = 1.00 for
Blue output, and all other sliders = 0.
Swap Channels Buttons
A set of three buttons at the bottom of the RGB Mixer lets you easily swap two channels with
one another. This can be useful as part of a creative look, or corrective in instances where two
channels are accidentally reversed.
 Swap Red and Green: Swaps these two color channels.
 Swap Green and Blue: Swaps these two color channels.
 Swap Red and Blue: Swaps these two color channels.
Using the RGB Mixer in Monochrome Mode
When you turn on the Monochrome checkbox, two of the sliders within each Output group are
disabled. This leaves the Red > Red slider, the Green > Green slider, and the Blue > Blue slider
as the only available controls.
Sliders at their default values when Monochrome mode is enabled
Keeping in mind that each of the color channels that makes up an image is itself a grayscale
channel, the RGB sliders in Monochrome mode let you add different proportions of the Red,
Green, and Blue color channels together to create custom grayscale versions of a shot.
To understand why this is useful, let’s consider the default values of the Red, Green, and Blue
sliders. To emulate the human eye’s sensitivity to the wavelengths of light, the Rec. 709 video
standard defines an isolated Luma (Y’) component as consisting of 0.2126 of the Red channel,
0.7152 of the Green channel, and 0.0722 of the Blue channels added together. This can be
seen in the default values (rounded to the nearest integer percentage) of 21, 71, and 7.
This is the standard method of deriving a black and white version of a color image, and in fact
produces identical results to those obtained by setting the Saturation parameter to 0.
However, there have traditionally been other ways of mixing the colors of life into different
grayscale interpretations. For example, photographers often use colored filters in conjunction
with black & white film stocks, such as a yellow/green filter to emphasize pleasing skin tone for
lightly complexioned people. A much older example is the use of black & white film stocks with
different sensitivities (old orthochromatic stocks were not sensitive to red wavelengths,
recording only blue and green to create an image).
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