Sign & Digital Graphics

2013 Buyer's Guide

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Terms of the Trade Character Generator—A device for creating text on video. Character generators are often used to make information channels and electronic bulletin boards for TV and Cable. CLUT (Color Look Up Table)—A digital color-processing tool for converting color from one color space or device to another, such as from RGB (scale, 0–255) to CMYK (0–100%). minance  (HSL);  hue, saturation and brightness (HSB); hue, saturation and value (HSV); red, green, and blue (RGB); and cyan, magenta, yellow and black (CMYK). Chase—The illusion of movement in neon tubes or incandescent bulbs created by turning the light sources on and off in sequence. Also, to decorate metal, typically by engraving or cutting. CMYK (Cyan, Magenta, Yellow, Black)—The four  process colors used in most analog and digital printing systems. Black is called "K" because in process printing black is the key plate or keyline color. Color Separation—Color separations consist of artwork that has been split into component plates of cyan, magenta, yellow and black in preparation for process printing (CMYK), or into the required number of plates for spot color printing. Each separation prints a single process or spot color. Digital files can be composite separations (all information in one file) or pre-separated (each color on its own page). Chromaticity—The quality of a color as determined by its purity and dominant wavelength, which is relative to saturation and hue, as used in the HSV model. Chrome—High-quality positive color film, ordinarily shot by professionals. It includes 35-mm slides, 2 1/4" x 2 1/4" medium-format film and 4" x 5" view-camera transparencies. Chrome positives are often used for proofing. Chrominance—The property of a color that describes its saturation, intensity, or colorfulness, used in differentiating two colors of equal brightness and hue. CIE (Commission Internationale de l'Eclairage)— A color-standards organization based in Vienna, Austria. The CIE's chromaticity diagram is a two-dimensional reference for defining colors and color spaces based upon physiological measurements of human color vision. An abbreviation for the CIE L*a*b* (CIELAB) color space. Cladding—Cover material applied over the framework of a structure. Classic Glass—Tubing used for neon signs or artwork in which the glass itself is colored achieving a deep, saturated color not possible with clear glass and phosphor coatings; typically a soda-lime based glass. Clip—A predefined graphic image, such as a picture, drawing, symbol, etc., that can be imported and positioned on a background. Clip Art—Ready-made, royalty-free pieces of printed or computerized graphic art. Clogging—The result of dried ink molecules in an inkjet printhead. Although some clogging is typical with inkjet printers and is rectified by following a cleaning procedure, prolonged or severe clogging may result in the printhead having to be replaced. Closed-Circuit Television—Traditionally, a private television network that is broadcasted internally within an organization. Modern narrowcasting solutions work over the Internet, deploying custom video and messaging anywhere in the world. 104 • Mid-June 2013 • S I G N SBGuide.indd 104 CNC (Computer Numeric Control)—Communications language used in some robotics and larger machine-controlled cutting devices such as computerized routers, industrial mills and lathes. Coat-Out—To paint the surface before the art is applied. Codec—A software module responsible for compressing and/or decompressing an encoded media format such as AVI digital video. Color Space—The set or model of how a device organizes color, assigning some formula—such as numeric values—as a way of replicating color. Examples of color spaces are RGB, CMY (without K, or black), and HSV. Color Specification—Color values used to numerically specify a color within a color system. Cold Cathode—The technical name for all forms of neon lighting. The term "cold cathode" is used to refer to 18mm to 25mm tubing operating at currents 60mA to 240mA. These gas discharge lamps also have electrodes that depend on a large emission surface area rather than high temperature for their operation. Color Wheel—Arrangement of the visible spectrum of electromagnetic radiation (color) in a circular fashion so that the primary colors (red, yellow, blue) are located 180 degrees from the secondary colors that complement them (green, violet, orange, respectively). Color Calibration—Hardware and/or software that allows a color match to be made between multiple digital devices. Colorant—Colored material, such as including pigments, dyes or toners, that are mixed with a carrier to create inks. Color Curve—Visual control used in photo-illustration and other graphics software to display color measurements and make tonal changes to an image. Conduit—A metal or PVC plastic tube for protecting electric cables. Color Gamut—The range and scope of colors that can be reproduced by a specific display or output or display device, or by a method of color representation (such as RGB or CMYK). Colorimeter—An optical device that measures absorbance of light by filtering reflected light into regions of red, green and blue. While dedicated colorimeters do exist, most instruments are actually spectrophotometers that compute colorimetric values based on spectral reflectance or transmittance curves. Confirmed Broadcasting—In  electronic digital signage, a type of broadcast content in which there is a back channel through which media players can respond to transmissions with confirmation or error messages. Content—In  electronic digital signage, content consists of any files that are played back on video screens, including graphics files, sound files, video files, data feeds and script files. Content Management—In  electronic digital signage, the act of controlling the flow and updating of the content of networked signage. Color Management—Refers to coordination of color with output and display. In output, color management is often handled on a device-by-device basis by imaging production software. See also RIP. Continuous Inkjet—Process where ink is pumped through inkjet printing nozzles at a steady pace. Droplets are either shot onto a substrate/material, or electrically charged and deflected away from the printable surface and into a collection system. Color Modes—Models of tones based upon different values, such as: hue, saturation and lu- Continuous Tone—Method of printing where color dots of equal size are placed in a variable-spaced & D I G I TA L G R A P H I C S 5/31/13 12:35 PM

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