Understanding EPSON TWAIN Features
3-13
Text Enhancement Technology (TET)
To improve recognition accuracy during OCR (Optical Character
Recognition) scanning, select this option. This function eliminates
the document background from scans.
Auto Area Segmentation (AAS)
To make grayscale images clearer and text recognition more
accurate, select this option. This function separates text from
graphics.
Note:
❏
B/W Option is available only when Pixel Depth is set to
Black &
White
.
❏
When you need neither TET nor AAS, select
None
.
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
×
4 Bayer)
Dither B (4
×
4 Spiral)
Dither C (4
×
4 Net Screen)
Dither D (8
×
4 Net Screen)
None
Note:
Halftone is available only when Pixel Depth is set to
Black & White
.
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
.
Summary of Contents for 1640SU - Perfection Photo Scanner
Page 2: ... 2 ...
Page 44: ...2 20 Scanning Basics High Contrast Increases the contrast of dull images Open Shadow ...
Page 54: ...2 30 Scanning Basics ...
Page 98: ...4 10 Calibrating Your System ...
Page 114: ...5 16 Options Paper support Spare paper path guide ADF Document Mat ...
Page 130: ...5 32 Options ...
Page 172: ...6 42 Maintenance and Troubleshooting ...
Page 185: ...Contacting Customer Support B 1 Appendix B Contacting Customer Support Overview B 2 ...
Page 192: ... 6 Glossary ...