Online Reference Guide

Index	Search	Glossary

Contents	Help

Understanding EPSON TWAIN HS Features

Image Types

The Image Type list provides the following predefined settings. They can be combined with the optional pixel depth, scanning mode, de-screening, and auto exposure settings.

Note:

The Auto Exposure feature is disabled when scanning without previewing.

24-bit Color:

An Image Type setting which produces 24-bit images with over 16 millions of colors. This setting reproduces highlight and shadow details. Use this setting to scan color photos, and display or print the images in full color.

24-bit Color De-screening:

An Image Type setting which produces 24-bit images with over 16 millions of colors. You can get relatively high contrast images with the moiré pattern removed. Use this setting to scan printed materials and display the images in full color.

Note:

A moiré is a cross-hatch pattern that appears on scanned images when scanning printed material. It is a result of interference that occurs due to the difference between the pitches of the scanning and the halftone screens.

If de-screening is selected and Resolution is set to more than 800 dpi, when you click Scan, an alert appears on the screen. Decrease resolution or scale.

8-bit Gray:

An Image Type setting which produces 8-bit grayscale images with 256 levels of gray. This setting reproduces highlight and shadow details. Use this setting to scan photos and display or print the images in grayscale.

8-bit Gray De-screening:

An Image Type setting which produces 8-bit grayscale images with 256 levels of gray. You can get images with the light part lighter and the dark part darker, with the moiré pattern removed. Use this setting to scan printed materials and display or print the images in grayscale.

Black & White:

An Image Type setting which produces black and white images without halftoning. Use this setting to scan drawings or line art illustrations.

Black & White Halftone:

An Image Type setting which produces black and white images with 4 x 4 dither halftoning patterns. Use this setting to scan drawings or line art.

[Top]