Glossary
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adjacent pixels is modified by diffusing errors on the objective pixel into several pixels, which are then binarized. This
maintains high grayscale levels and resolution during reading, while suppressing more patterns by dotted halftone images
such as newspaper photographs.
F
FCC
Acronym for "The Federal Communications Commission", an independent United States government agency which is in
charge of regulating interstate and international communications via radio, television, wire, satellite and cable. The Part 15 of
the FCC regulations mentioned in this manual is designed to prevent harmful interferences on radio communication of radio
receivers and other devices which radiate radio frequency energy, and provides for the certification of radio receivers. It also
provides the certification of low power transmitters and the operation of certificated transmitters without a license.
Feed rollers
Rollers that feed documents through the ADF.
Filtering
A correction method that improves the read quality of handwritten documents. The read quality of images written in pencil or
ball-pointed pen depends on the reflective light characteristics of the specific ink or lead used. Dropped pixels may produce
outlines, gaps, or thin, barely connected lines due to uneven optical density. Filtering detects areas lighter than their surround-
ings and increases their density to improve image clarity.
Flat bed
An input device of the scanner, where documents are placed and scanned. Generally used for scanning pages out of a book,
or paper that is out of the feeding specification of the ADF. Also used to scan a small volume of documents by manual opera-
tion.
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