Ricoh ISO1 Manuel de l'opérateur télécharger pdf (Page 64)

SCANNER FEATURES

A-6

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.

8X4 45° 6X6 90° 8X6 60° 8X8 90°

12X6 45° 10X8 60° 12X8 60° 16X8 45°

16X16 90° 8X8 Bayer

Error diffusion

Original

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Ricoh ISO1 Manuel de l'opérateur Page 64