Computer Products of America Image Scanner Operator's Guide fi-4990C

GL-3
Front-side reading = Front-side scanning
Refers to reading the front-side of the document, specifically in Duplex reading mode.
Halftone processing
Used to reproduce photographs which usually contain different shades to display images. These shades
are composed of dots resulting in a binary image. Dithering and error diffusion processing are examples
of the halftone processing.
Hexadecimal
A base-16 numbering system (also commonly referred to as hex numbers). Since a base-16 system
requires 16 digits, numbers 0 through 9 and letters A through F are used. It is convenient to express binary
numbers in hexadecimal because fewer digits are required.
Image emphasis
Density is decreased for lighter but not completely white areas adjacent to black areas. Weakening this
emphasis eliminates spot noise or produces softened images.
Image processing
An image is read with specified parameters.
Initial screen
A screen displayed when the power is turned on or when reading is activated by the command from the
host computer.
Interface
The connection that allows communication from one part of a system to another. For example, electrical
signals are transferred between the computer and scanner over an interface cable.
Inversion (Reverse-image reading)
In reverse-image reading, data is changed from black to white and vice versa.
IPC-3 mode
While reading binary images, it is necessary to set the scanner according to the quality of the sheet to be
read. In this mode these settings can be performed in advance by corresponding each setting to a pattern
number.
16GL.P65 01.2.17, 5:47 PM3