Halftone Scanning - Ricoh IS450DE Operator's Manual

SCANNER FEATURES

Halftone scanning

Function
Creates the illusion of gray scales by simulating shades of gray
from patterns of black and white dots.
Usage Use halftone scanning when you are scanning an image that has
gray shadings (for example, a photograph) when you want to print
or display the image on a monochrome device, such as a laser
printer. Halftoning requires less memory. Therefore, it is convenient
for filing a large amount of image data. This scanner has eleven
halftoning methods, including ten dithering methods and one error
diffusion.
Original
8X4 45°
12X6 45°
16X16 90°
A-6
6X6 90° 8X6 60°
10X8 60° 12X8 60°
8X8 Bayer Error diffusion
8X8 90°
16X8 45°