Color Management System (CMS) software increases the accuracy of color interchange between scanners, displays
and printers based on profiles for each device. The CMS is a layer of software resident on the computer that
negotiates color reproduction between the application and color devices. The CMS performs the color transformations
necessary to exchange accurate color between diverse devices. The Color manager needs access to
characterization data for the device. The format and content of such device profiles is standardized by the
International Color Consortium (ICC.)
Process of separating colors, in an image, into primary color components for printing. Converting an RGB color image
into CMYK color image. Color separation is a technical function during which critical settings such as GCR, black ink
limit and total ink limit are applied to the image.
A color space is a particular language used to describe color. Examples of color spaces are: RGB, CMYK, HSV, CIE
LAB.
The difference between the lightest and darkest significant areas in a picture. A picture with high contrast has nearly
white areas and nearly black areas with sharp changes in brightness between them. The picture seems dominated by
stark light and dark tones.
Photographers and printers measure transmission in base-10 logarithmic density units, where transmission of unity
corresponds to a density of 0, transmission of 0.1 corresponds to a density of 1, transmission of 0.01 corresponds to
a density of 2, and so on.
The light stopping ability of a film. Density is inversely proportional to the amount of light reflected or transmitted by an
image.
Device Dependent Color Space:
For example RGB. A device dependent color space, e.g., the same scan file will appear different when viewed on
different computer displays. For example CIE LAB. A device independent color space is one in which color values are
absolute, e.g., defined by CIE standard. CIE LAB is the central color space in color management systems (CMS) and
is used to translate between different device dependent color spaces such as scanner RGB and display RGB.
A file used as part of a Color Management System (CMS). A device profile contains information about the
characteristics of a scanner, computer display or printer. The format for device profiles (Win95, Colorsync. etc.) is
standardized by ICC (International Color Consortium).
Digital Image Processor. Hardware embedded function that does image enhancement in real-time while scanning.
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