Xerox P8EX Spire CXP8000 Color Server - User Guide - Page 439

Glossary 24 bit/3 byte image 32 bit/4 byte image 4 color printing 8 bit/1 byte image Additive color model Amplitude Modulation Anti-Aliasing An image can be either RGB or CMY and each of the three colors uses 1 byte or 8 bits of data. Since 3 bytes equals 24 bits, these images are also known as 24 bit images. This system is used for high quality video imaging and scanning. For process color printing, a fourth color (black) is added for optimum effect. An image that uses 8 bits each for CMYK pixels, or 8 bits for each RGB pixel and 8 pixels for a mask layer or other future use. Since 4 byte equal 32 bits, these images are also known as 32 bit images. An 8 bit CMYK image is the minimum required for high quality print reproduction. Color reproduction method used to create full color output by overlaying cyan, magenta, yellow and black inks. An image limited to 256 tones of one color or 256 different colors. Since 1 byte contains 8 bits and each bit has two choices, 1 byte equals 28 choices or 256 possibilities. Color system in which the picture is composed of the combination of Red (R), Green (G) and Blue (B) light transmitted by the original subject. Effective for monitors and TV's but not for print. Scanners normally first scan in RGB and it is converted into CMYK for printing. See also RGB, CMYK, Process colors, Subtractive color model. Halftone screening, as opposed to FM screening, has dots of variable size with equal spacing between dot centers. A step effect in which angled lines or curved edges of elements in an electronic image look broken or jagged, as a result of producing it in a grid format. Increasing resolution can reduce this effect or using a technique called anti-aliasing where the edges are softened.