Lexmark Optra S 1620 User's Guide (7.1 MB) - Page 358

Enhancing Print Quality Appendixes Binary The ability to turn a pixel on or off, as opposed to assigning it a range of intensities; single-color printers (monochrome printers) are binary. Continuous Tone The ability to represent many levels of intensity for a single pixel, as opposed to simply turning the pixel on or off. Resolution The spacing of pixels the printer can address and resolve individually, usually measured in the number of dots per inch (dpi). Text Alphabetic and numeric characters and symbols. Graphics Any of a variety of pictorial representations, including basic line art, charts, and graphs, usually electronically generated from a software application. Images Visual data typically scanned from original sources external to the PC, such as photographs or video frames. Gray Scales Graphics or images consisting of gray dots representing a range of intensities, as opposed to black only dots; gray scale objects must be converted to halftones before they can be printed on a binary printer. 342 Enhancing Print Quality