Glossary
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Filter
A function that applies a type of filter operation process on a scanned image.
Types of filtering are as follows:
Digital Endorser:
Adds alphanumeric character strings on the scanned image data.
Page Edge Filler:
Fills in the margins of the scanned image in a specified color.
Flatbed
An input device of the scanner.
A user places sheets of documents one by one on the document bed (glass section) and scans each sheet.
Used to scan documents that cannot be scanned in the ADF, such as books and magazines.
G
Gamma
A unit which indicates the changes in the brightness of an image. It is expressed as a function of the electric input power to
devices (such as a scanner and a display) and the brightness of the image. If the gamma rate is larger than 1, the
brightness of an image increases and vice versa. Normally, set the gamma rate to 1 when reproducing the same brightness
as the original.
Grayscale
A method which expresses the gradation (density) from black to white in 256 levels. Suitable for scanning images such as
photographs.
H
Halftone
Reproduces the color density in black & white by using dot patterns. This method is effective for scanning images such as
photographs in black & white.
