Scanning Composition - Bell and Howell 500 FB Operator's Manual

Scanning composition

Function You can scan using one of three compositions: binary, halftone, or
multi-value. Binary scanning records only black and white from the
original. Halftone scanning records gray shades from the original
using a pattern of black and white dots. Multi-value scanning
records grays over 16, 64, or 256 levels.
Usage
Use binary scanning to scan an image that has no gray shading, for
example, text or lines. Use halftone scanning to scan an image
that has gray shading (for example, a photograph) when you want
to print or display the image on a monochrome device, such as a
laser printer. Use multi-value scanning to scan an image that has
gray shading when you want to print or display the image on a
gray scale device.
Original
Halftone scanned image
SCANNER FEATURES
Binary scanned image
Multi-value scanned image
A-3