Epson STYLUS SCAN 2500 User Manual page 143

Note:
A moire is a crosshatch pattern that is 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.
Black & White Photo:
8-bit Gray, best quality
Line Art:
Black and white, draft quality
OCR:
Black and white, best quality, with Text Enhancement
Technology
Copy/Fax:
Black and white, hard halftone, draft quality, with Auto Area
Segmentation
Image Type button
The Image Type button allows you to customize the Image Type
settings. If you want to make many detailed settings manually,
use this feature.
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