Epson STYLUS SCAN 2500 User Manual page 146

Note:
The B/W Options setting is available only when Black &
White is selected as the Pixel Depth setting.
When you need neither TET nor AAS, select None. Default is
None.
To apply the settings you made, click OK. The Preview
window displays the effects of the current settings except for
TET (Text Enhancement Technology) and AAS (Auto Area
Segmentation) settings.
Halftone:
Select a halftone or dither setting to reproduce images using
special dot patterns:
Mode A (Hard Tone) , Mode B (Soft Tone), Mode C (Net
Screen), Dither A (4 x 4 Bayer), Dither B (4 x 4 Spiral), Dither
C (4 x 4 Net Screen), Dither D (8 x 4 Net Screen), or None.
Note:
Halftone is available only when Pixel Depth is set to Black &
White.
To apply the settings you made, click OK . The Preview window
displays the effects of the current settings except for TET (Text
Enhance Technology) and AAS (Auto Area Segmentation)
settings.
To cancel the settings, click Cancel .
To save the settings you made as a group of custom settings, type
a new name in the Image Type Name box, then click Save .
To delete an Image Type setting, select the setting name to be
deleted in the Image Type Name menu, then click Delete .
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