3-12
Understanding EPSON TWAIN Features
Color Smoothing
Select either
On
or
Off
. When
On
is selected, colors in an image
are related to limited number of index colors. This is useful when
scanning large areas of solid colors (for example, logos,
illustrations, and charts).
Note:
❏
The pixel depth of output image is 24-bit color.
❏
Color Smoothing is available only when Pixel Depth is set to
24-bit
color
.
Auto Exposure Option:
Select either
Photo
or
Document
. You can see the effects of the
Auto Exposure Option setting in the Preview window when you
click the
Auto Exposure
button.
Dropout:
Select a color to subtract from a black and white scan of a colored
original. Proper use of dropout can improve the quality of your
black and white scans. Available dropout options are:
None
,
Red
,
Green
, and
Blue
.
Note:
❏
Dropout is available only when Pixel Depth is set to
14-bit Gray
,
8-bit Gray
, or
Black & White
.
❏
Depending on the image you scan, you may need to adjust the
Threshold setting in the Image Controls dialog box to enable this
feature.
B/W Option:
Select from:
Text Enhancement Technology
,
Auto Area Segmentation
,
or
None
.
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 ...