Scanning - Epson PERFECTION 1640 SU Reference Manual

Display

Scanning

Scanner type
Photoelectric device
Effective pixels
Document size
Scanning resolution
Output resolution
Zoom
Image data
Brightness
Line Art settings
A-4
Technical Specifications
Color Monitor, 640 × 480 screen resolution (or higher
recommended), and 256 color (32,000 color or higher
recommended)
Note:
Color and tone reproduction are subject to the display
capability of your computer system, including the
video card, display monitor, and software. See the
product documentation for details.
Flatbed, color
Color CCD line sensor
13600 × 18720 pixels at 1600 dpi, 100%
216 mm × 297 mm (8.5 inches × 11.7 inches)
A4 or US letter size
(The reading area can be specified from your
software.)
1600 dpi (main scan)
3200 dpi with Micro Step (sub scan)
50 dpi to 12800 dpi
(50 to 6400 dpi in 1 dpi increments, 9600 dpi,
and 12800 dpi. 9600 dpi and 12800 dpi
performed with zoom function)
50% to 200% in 1% increments
14 bits per pixel per color internal
14 bits per pixel per color external
7 levels
(In EPSON TWAIN, Gamma
correction controls Brightness)
Fixed threshold
Text Enhancement Technology
(enable/disable selectable)