Microtek ScanMaker IIG User Manual page 256

Appendix J: Glossary...
Color calibration
The process of ensuring accurate reproduction of color for images. Full
color calibration is usually a two-step process: calibrating your input
device, such as a scanner; and calibrating your output device, such as a
printer or monitor. By calibrating input and output devices correctly, color
is accurately captured by your scanner and is reproduced faithfully on your
monitor or printer as well.
CCD
Stands for charge-coupled device, a strip of light-sensitive cells that
converts light waves reflected from an image during scanning into digital
information.
Color channel
Refers to the red, green, and blue components from which colors are
created.
Color image
An image type that contains the most complex information (compared to
single-bit and grayscale images). To capture color images, scanners use a
process based on the RGB color model.
Contrast
The relationship between the light and dark areas of an image. Contrast is
the range between the darkest and lightest shades in an image, while
brightness is the balance of light and dark shades. Contrast determines the
number of shades you get; brightness determines the intensity of the
shades. An image with low contrast tends to look dull and flat.
DCR
Stands for Dynamic Color Rendition, Microtek's exclusive color calibra-
tion technology. DCR ensures that reproduced colors in your scanned
image match those of the original as closely as possible. DCR comes
standard on the ScanMaker III and is available as an option for all other
color scanners.
Dpi
Stands for dots per inch, the measure of resolution. The greater the dpi
number, the higher the resolution.
J-2 Microtek User's Guide for Windows