Glossary
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F
Feed roller
A roller that feeds the document through the ADF.
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.
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.
