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Question:

Additive color mixing, or trichromatic?

The fact that all colors on older televisions were created by combining only three different colors of light supports the _ theory of color vision.Can anyone fill this in for me please? I know it has to be either additive color mixing or trichromatic...Thanks!

Answer:

Additive color theory states that RGB are the additive primaries and a mixture of these colors creates all other colors (this is in contrast to subtractive theory which uses CMY) Although RGB color space is mapped to the visual system via xyz colors, where the full circuit would be thus: RGB>xyz>x-bar,y-bar,z-bar>Yuv>RGB Our eyes actually work on a 2 channel binary system. This means that instead of having three channels of R-G-B (a component system) we have a channel for Red vs Green and a channel for Blue vs Yellow (an opposition) system. Bottom line: Since trichromatic theory includes yellow, it has to be the additive color mixing theory which, although archaic is still heavily used

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