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Glossary
116
C
CIS (Contact Image Sensor)
A sensor which uses an LED and a light receiving sensor to perceive the light reflected from the document and converts the
light into digital form. CCD technology is the basis of high quality image acquisition in scanners, cameras and other devices.
D
Default setting
(Hardware)
Preset values from the factory.
(Software)
Values set upon installation of software.
Density
Refers to the deepness of a color in an image.
Device errors
Errors that require troubleshooting by a service engineer.
Dither
The process by which a group of dots is arranged to reproduce the density of grayscale. Grayscale density is reproduced by
configuring preset dot patterns. This method requires less memory compared to multilevel gray.
Document Sensor
A sensor which detects the changes in the amount of light transmission. Paper feeding errors such as multifeed and paper
jam are detected by monitoring the passing of documents.
dpi (dots per inch)
A measurement of resolution which is used for scanners and printers. Higher dpi indicates better resolution.
Driver
A program specifically designed for operating systems, which enables interaction with a hardware device.
Dropout color
A function which removes a specified color from a scanned image.