Glossary
Page 75
OCR
Optical Character Recognition. The technology that allows computers to
“read” text from physical objects. OCR requires a graphical representation
of text to interpret, which usually comes from a scanned image.
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.
resolution
Indication of how finely an image is resolved into pixels. Measured in dots
per inch (dpi), pixels per inch (ppi), or samples per inch (spi).
scan
An operation performed by the sensor and the carriage of a scanner. The
image is divided into pixels by scanning.
scanning area
The physical size of the image that can be scanned by the scanner.
SCSI
Small Computer System Interface. A method used to connect your
computer to peripherals such as scanners, hard disk drives, and
CD-ROM drives.
SCSI chain
A SCSI bus arrangement that allows several devices to be connected
simultaneously in a line to a single computer. Sometimes called a daisy
chain.
SCSI ID
The numbers that all devices in a SCSI connection use to identify each
other. If the same ID number is used by two devices in the same SCSI
chain, the devices cannot operate properly.
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