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Appendix
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Appendix Chapter 7
7.3 Glossary
Term Definition
BMP Abbreviation for Bitmap. A file format for saving image data which
uses the .bmp extension. Commonly used on Windows platforms.
You can specify the color depth from monochrome (2 values) to full
color (16,777,216 colors). Images are not usually compressed when
saved.
Byte Unit of information (data quantity) on a computer or printer.
Configured as 1 byte equals 8 bits.
Default The initial settings. The settings first selected when the machine is
turned on, or the settings first specified when the function is
selected.
Density An indication of the amount of darkness in the image
Density Adjustment The function that adjusts the color tones of an output device, such
as a printer or monitor
Dither A method of using only black and white to create the illusion of
different shades of gray. The process is simpler than with error
diffusion; however, some irregularities may occur.
DPI (dpi) Abbreviation for Dots Per Inch. A resolution unit used by printers and
scanners. Indicates how many dots per inch are represented in an
image. The higher the value, the higher the resolution.
Driver Software that works as a bridge between a computer and a
peripheral device.
Ethernet LAN transmission line standard
File Extension The characters added to the file name in order to differentiate file for-
mats. The file extension is added after a period, for example, “.bmp”
or “.jpg”.
Gradation The light and dark levels of an image. As the number increases,
smoother brightness variations can be reproduced.
Grayscale Monochrome image expressive form using the gradation information
from black to white
Halftone The method of producing the light and dark parts of an image
through varying sizes of black and white dots
Hard Disk Large capacity storage device for storing data. The data can be
stored even if the power is turned off.
Install To install hardware, operating systems, applications, printer drivers
on to a computer
LAN Abbreviation for Local Area Network. A network which connects
computers on the same floor, in the same building, or in neighboring
buildings.
LDAP Abbreviation for Lightweight Directory Access Protocol. On a TCP/
IP network, such as the Internet or an intranet, this protocol is used
to access a database for managing environment information and the
e-mail addresses of network users.
Memory Storage device for storing data temporally. When the power is
turned off the data may or may not be erased.
