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Glossary
Black-Point Eyedropper
The Histogram tool that lets you select the darkest portion of the image in the
preview area.
Brightness
The overall amount of lightness or darkness in an image. An image with
maximum brightness tends toward white; an image with minimum brightness
tends toward black. While contrast refers to the range and number of tones
in an image, brightness refers to the intensity of tones.
Canon ColorGear Color Matching
Canon’s process of matching the color profile of the input device (scanner)
with the color profile of the output device (monitor), to yield the most accu-
rate color image.
Channel
See Color Channels.
Clear Preview 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 “Key color.”)
Color Channels
The red, green, or blue components of a color image. Color images contain 8
bits/12 bits per pixel each for red, green, and blue channels, therefore each
pixel has 24 bits/36 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.
Color Matching
The range of colors your scanner can see may not match the range of colors
your video monitor can produce. Color matching lets your system display
colors so that the color on your monitor and printer matches the colors
scanned. See also Canon ColorGear
TM
Color Matching.