Changing Resolution; Unsharp Mask; Size - Epson Perfection 640U Reference Manual
Color image scanner
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Also See for Perfection 640U:
- Scanner basics (71 pages) ,
- Service manual (53 pages) ,
- Product support bulletin (31 pages)
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Changing Resolution
You can change the resolution for the current scanning operation
by selecting or typing a new value. Available resolution options
are 72, 96, 150, 300, 600, 1200, 2400, and 9600 dpi.
Unsharp Mask
You can select or deselect the Unsharp Mask setting. Selecting the
check box improves image sharpness.
Note:
If the Image Type setting is Text/Line Art or Illustration, this check
box appears dimmed and cannot be selected.
Size
The Size fields indicate the size of the image that is displayed or
selected in the Preview window.
3-8
Understanding EPSON TWAIN Features
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