User`s guide

D-4 Microtek ScanWizard 5 User's Guide (Macintosh version)
Lpi (lines per inch)
The resolution of printed images. Lpi is distinct from dpi, which measures the resolution of
electronic images.
Midtones
The parts of an image between the lighter and darker areas, at around 50% gray.
Moiré
An undesirable pattern in color printing that results from incorrect screen angles of overprinting
halftones. Moirés usually result when you scan a halftone or when you scan images taken
directly from a magazine (instead of scanning a photographic original or a transparency).
Optical resolution
The true resolution of a scanner and is the key factor in determining the amount of detail visible
in an image. Optical resolution is one type of resolution; the other is interpolated resolution.
Overview button
The Overview button is found in the Previe window and previews the image in the scan bed.
By default, the entire scan bed is previewed, but new dimensions can be specified for the
Overview through the Overview Setup command in the Preferences menu.
Pixel
A unit used by the computer to describe picture elements and to represent image information in
a digital format. An image file, for instance, is simply a representation of hundreds (or thou-
sands) of pixels arranged in a grid.
Prescan button
The Prescan button is found in the Preview window and previews in high resolution the area
selected by the scan frame. Options governing the prescan function can be found in the Prescan
Setup command in the Preferences menu.
Preview window
This window is the most prominent window of ScanWizard 5 and includes the various com-
mands and tools for controlling the scanner and for showing your preview image.
Resolution
The level of detail in an image, expressed in dots per inch (dpi), or lines per inch (lpi). The
greater the dpi number, the higher the resolution and the resulting file size. There are two types
of resolution: optical resolution, and interpolated resolution.