Type; Rgb; Grayscale; Cmyk - Microtek ArtixScan 120tf Reference Manual

Type

ScanWizard Pro TX allows direct scanning of your
original into the following color spaces described
below. The desired color space for your output can
be selected from the Type list box of the Settings
window.

RGB

RGB (Red, Green, and Blue) images use three colors
to reproduce up to 68.7 billion colors. Because
scanners and monitors are RGB devices, the RGB
color space is the most commonly used color space for capturing and displaying
images. ScanWizard Pro TX offers standard RGB and 48-bit RGB color selection,
with the 48-bit option available for the Artix line of scanners and other Microtek
professional pre-press scanners.

Grayscale

Grayscale images use shades of gray to simulate gradations of color or tonal
values, and contain 8 bits per pixel. The Grayscale 16-bit option is provided in
ScanWizard Pro TX for professional pre-press scanners.

CMYK

CMYK images are made up of the standard four colors (cyan, magenta, yellow
and black or K) for separated film or digital files used for sheetfed or web offset
printing. CMYK mode instantly converts the scanner' s RGB input to the CMYK
color space. CMYK images are four-channel images, containing 32 bits per pixel.

Lab Color

Lab images are three-channel images containing 24 bits per pixel. Lab mode is
useful for editing a pixel' s luminance but not its color values. Lab mode produces
device-independent color and is recommended for moving images between
systems or printing to a PostScript Level 2 printer.
Reference: The Settings Window 55