Canon CanoScan FB 630U User Manual page 72

Glossary
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Glossary
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Canon ImageTrust
Canon's process of converting grayscale image (8 bits per pixel) to
a black and white image (1 bit per pixel) to yield a more effective
scan for optical character recognition (OCR) applications.
Channel
See Color Channels.
Clear button
The button that removes the current image from the Preview
Area.
CMY
An acronym for cyan, magenta, and yellow, the color
complements to red, green, and blue.
CMYK
An acronym for cyan, magenta, yellow, and black, the four-color
process used in most commercial printing. (The black "K" stands
for "BlacK".)
Color Channels
The red, green, or blue components of a color image. Color
images contain 8 bits per pixel each for red, green, and blue
channels, therefore each pixel has 24 bits. If you are scanning a
color image, you can change the brightness and contrast of the
individual red, green, and blue tones in your image. The Master
channel is a combination of the three.
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