IBM Ricoh ScanPro - Manual (Page 29)

Pixel
Represents a single dot of the picture. Pixels are used by the
computer to represent image information in digital computer
language.
TWAIN
Refers to an industry standard that has been developed for
scanning or other external imaging devices to communicate
with the computer. ImageDock and InfoCenter Lite are
TWAIN compliant applications.
24-bit color
Color images composed of three 8-bit channels: red, green,
and blue. With 24-bit color, it is possible to have over 16
million possible color combinations providing for a more
photo-realistic image. Also called True Color. 24-bit color has
nothing to do with the operating system.
30-bit color
Color images composed of three 10-bit channels: red, green,
and blue. Over 50 billion color combinations are possible,
providing for more vivid color reproductions with subtle
gradiations of hue. 30-bit color has nothing to do with the
operating system.
Brightness
The balance of dark and light shades determine the intesity of
an image.
Contrast
The range between the darkest and the lightest shades
determine the number of shades in an image. An image with
low contrast can look dull and flat.
Gamma
Changing the gamma allows you to alter the brightness of the
middle range tones without affecting the shadows or high-
lights.
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