Ricoh IS430 Manuel de l'utilisateur - Page 34
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Image Scanner User's Manual
¡ Halftone scanning
Function:
Usage:
- 26 -
03_IS430-BODY
Halftone creates the illusion of gray scales by simulating shades of gray from pat-
terns of black and white dots.
Use halftone scanning when scaning an image with gray shadings such as a photo-
graph, to be printed or displayed on a monochrome device, such as a laser printer.
Halftoning saves memory, so it is convenient for filing a large amount of image
data. This scanner has eleven halftoning methods: ten dithering methods and one
error diffusion method.
Original
6~6 90
8~4 45
12~6 45
10~8 60
16~16 90
8~8 Bayer
Page 26
8~6 60
8~8 90
12~8 60
Error diffusion
97.5.8, 5:36 PM
16~8 45
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