Understanding EPSON TWAIN Features
3-11
Image Type Name:
The names of predefined settings and any custom settings you
have saved appear in the Image Type Name list.
Pixel Depth:
Select scanning colors from:
42-bit Color
24-bit Color
14-bit Gray
8-bit Gray
Black & White
Scanning Mode:
Select either
Best
or
Draft
scanning quality. Select
Best
when
quality is more important than speed.
De-screening:
Select either
On
or
Off
. When
On
is selected, moiré patterns are
automatically removed from scanned images, but scanning takes
longer.
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.
❏
De-screening appears dimmed and is not available when Pixel Depth
is set to
Black & White
.
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 ...