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Glossary

Glossary

additive primary colors
The colors of red, green and blue (RGB) - which give the perception of white when combined equally. These are the colors of the color system used by monitors and scanners.
application
A software program that helps you carry out a particular task, such as word processing or financial planning.
ASCII
American Standard Code for Information Interchange. A standardized coding system for assigning numerical codes to letters and symbols.
banding
The horizontal lines that sometimes appear when printing graphics. This occurs when the print head is misaligned.
bi-level data
Image data that is composed of 1 bit per pixel. A pixel is represented by a single bit of digital data that can be expressed as only 1 (light) or 0 (dark).
bit
A binary digit (0 or 1), which is the smallest unit of information used by a printer or computer.
bit/pixel
The unit that indicates the number of bits allocated for a pixel. The larger the bit value, the more detail of a pixel will be reproduced.
brightness
The lightness or darkness of an image.
buffer
The portion of the printer's memory used to store data before printing it.
byte
A unit of information consisting of eight bits.
characters per inch (cpi)
A measure of the size of text characters, sometimes referred to as pitch.
CMYK
Cyan (blue-green), magenta, yellow, and black. These colored inks are used to create the subtractive system array of printed colors.
color correction
A method of adjusting the color image data for a particular type of device so that the reproduction results are as close as possible to the original colors.
color matching
A method of processing color data so that colors displayed on a computer screen closely match colors in printouts. A variety of color-matching software is available. See also ColorSync.
color separation
A process of converting full-color images into a limited number of primary colors. Additive primary colors (red, green, and blue) are used by the scanner, and the subtractive primary colors (cyan, magenta, and yellow) plus black are used for printing press separation.
color space
A method that reproduces a specific color. Additive primary colors (red, green, and blue) are used by the scanner, and subtractive primary colors (cyan, magenta, and yellow) plus black are used for printing press separation.
ColorSync
Macintosh software that is designed to help you get WYSIWIG (what you see is what you get) color output. This software prints colors as you see them on your screen.
cpi
See characters per inch (cpi).
default
A value or setting that takes effect when the equipment is turned on, reset, or initialized.
dithering
A halftoning method in which dots are arranged in an orderly pattern. Dithering works best for printing images with solid colors, such as charts and graphs.
document
The item, such as a sheet of paper or a book, that is placed on the document table to read.
dpi
Dots per inch. The dpi measures the resolution. See also resolution.
drive
A memory device, such as CD-ROM, hard disk, or floppy disk. In Windows, a letter is assigned to each drive for easy management.
driver
A software program that sends instructions to a computer peripheral to tell it what to do. For example, your printer driver accepts print data from your word processor application and sends instructions to the printer on how to print this data.
dropout color
A color the scanner does not recognize and ignores. You can select and deselect dropout colors in the scanner software.
DTP
Desktop Publishing system, a system that enables you to edit a publications on a computer.
economy printing
Printing in which images are printed with fewer dots to save ink.
ESC/I
Abbreviation for EPSON Standard Code for Image scanners. A system of commands that allows you to control image scanners from your software.
ESC/P
Abbreviation for EPSON Standard Code for Printers, the system of commands your computer uses to control printers. It is standard for all EPSON printers and supported by most application software for personal computers.
exposure
A scanner function that lightens or darkens the scanned image data.
font
A style of type designated by a family name.
gamma
Gamma is a value that expresses the relationship between the input and output of a device. By adjusting the gamma, the brightness of the mid-tones of an image can be changed without affecting the shadows and highlights.
grayscale
A scale of shades of gray from black to white. Grayscale is used to represent colors when printing with black ink only.
high speed printing
Printing in which images are printed in both directions. This provides faster printing.
ICM
Image Color Matching. Windows color management system designed to help you get WYSIWYG (what you see is what you get) color output. This software displays colors on your screen as they exist on the scanned documents, or prints colors as you see them on your screen.
initialization
Returns the printer to its defaults (fixed set of conditions). This happens every time you turn on or reset this product.
ink cartridge
Contains the ink this product uses when printing.
ink jet
A method of printing in which each letter or symbol is formed by precisely spraying ink onto paper.
interface
The connection between the computer and this product. A parallel interface transmits data one character or code at a time. A serial interface transmits data one bit at a time.
interface cable
The cable that connects the computer and this product.
local printer
The printer connected to the computer's port directly by interface cable.
marquee
A moveable and adjustable frame that marks the area of an image that will be previewed or scanned.
media
Materials upon which data is printed, such as envelopes, plain paper, special paper.
memory
The part of the printer's electronic system that is used to store information (data). Some information is fixed and is used to control how this product operates. Information that is sent to this product from the computer is stored in memory temporary. See also RAM and ROM.
moiré
A moiré is a cross-hatch pattern that appears on scanned images when scanning printed material. It is a result of interference that occurs due to the difference between the pitches of the scanning and the halftone screens.
monochrome
This means printing with only one color of ink, which is generally black ink.
nozzle
Fine tubes in the print head through which ink is sprayed on the page. Print quality may decline if the print head nozzles are clogged.
operation check
A method for checking the operation of this product. When you perform a operation check, this product prints the ROM version, code page, ink counter code, and a nozzle check pattern.
page sequence
The type of color scanning in which the entire image is scanned once for each separate color.
pixel
Short for picture element. Each image is composed of a number of pixels. Pixels are also counted in units of dots.
port
An interface channel through which data is transmitted between devices.
primary colors
Basic colors. See additive primary colors and subtractive primary colors.
printable area
The area of a page on which this product can print. It is smaller than the physical size of the page due to margins.
printer driver
A software program that sends commands for using the features of this product. Often shortened to "driver".
print queue
If this product is connected to a network, print jobs that are sent to this product while it is busy are stored in a waiting line, or print queue, until they can be printed.
RAM
Random Access Memory. The portion of this product's memory used as a buffer and for storing user-defined characters. All data stored in RAM is lost when this product is turned off.
reset
To return this product to its defaults by turning this product off and then back on.
resolution
The number of dots per inch used to represent an image.
ROM
Read Only Memory. A portion of memory that can only be read and cannot be used for data storage. ROM retains its contents when you turn off this product.
RGB
Red, green, and blue. These colors, in phosphors irradiated by the computer monitor's electron gun, are used to create the additive array of screen colors.
scan
An operation performed by the sensor and the carriage. The image is divided into pixels by scanning.
scanning area
The physical size of the image that can be scanned by this product.
spool
The first step in printing, in which the printer driver converts the print data into codes that your printer understands. This data is then sent to the printer directly or to the print server.
spool manager
The software program that converts print data into codes that this product understands. See also spool.
sRGB
A standard color space used as the default color space within the Windows 98 color management system (ICM 2.0).
status monitor
The software program that allows you to check this product's status.
subtractive colors
Colors produced by pigments that absorb some colors of light and reflect others. See also CMYK.
subtractive primary colors
The colors of cyan, magenta, and yellow (CMY) which produce black when mixed in certain amounts. In printing, black is often added to give more definition as mixing of actual inks cannot produce pure black.
threshold
A reference point that is used to determine whether data will be processed as "on" or "off". In the case of color image data, "on" means that a certain color will appear in a pixel or dot, and "off" means that color will not appear there.
tone correction
A method of adjusting the tone curve so that the reproduction results on different types of output devices have gradations similar to the original image.
tone curve
The graph that shows the contrast ratio between the input (original image) and output (image data) in image processing.
unsharp mask
Originally a photographic process in which a sharply focussed and a slightly out-of-focus image are combined to produce a sharper image. This process is simulated by software to produce the same effect.
USB interface
Universal Serial Bus interface. Enables the user to connect up to 127 peripheral devices (such as keyboards, mice, and printers) to the computer through a single, general purpose port. The use of USB hubs allows you to add additional ports. See also interface.
WYSIWIG
What-you-see-is-what-you-get. This term is used to describe printout that looks exactly like it appears on screen.


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Version 1.00E, Copyright © 2003, SEIKO EPSON CORPORATION