Canon CanoScan N650U User Manual page 88

Glossary
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Clear button
The button that removes the current image from the Preview Area.
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.
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 Color Matching.
Color Mode
The type of scan used to scan an image, differentiated by the number of
bits per pixel. ScanGear CS-U has the following Color Modes:
Color(Photo), Color (Documents, Charts), Grayscale, Text
Enhanced(OCR), and Black and White.
Contrast
Contrast refers to the difference between the lightest light and the
darkest dark in the image. A low contrast value indicates that the
difference between dark shades and light shades is not very great. A
high value indicates a great difference between dark and light shades.
While brightness refers to the intensity of tones in an image, contrast
refers to the range and number of tones in an image.
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