Epson GT-5500 - Manual (Page 44)

Scanning
Scanner type: Flatbed, color
Photoelectric device: Color CCD line sensor
Effective pixels: 3400
×
4680 pixels at 400 dpi, 100%
Document size: 216 mm
×
297 mm (8.5 inches
×
11.7 inches)
A4 or US letter size
(The reading area can be specified from
your software.)
Scanning resolution: 400 dpi (main, sub)
Output resolution: 50 dpi to 1600 dpi in 1 dpi steps
Color separation: RGB color filters on CCD
Reading sequence:
Monochrome One-pass scanning
Color page sequence Three-pass scanning (R, G, B)
Color byte sequence One-pass scanning (R, G, B)
Color line sequence One-pass scanning (R, G, B)
Zoom: 50% to 200% in 1% increments
Image data: 10 bits per pixel per color saved as 8 bits per
pixel per color maximum
Brightness: 7 levels
Line Art settings: Fixed threshold
Text Enhancement Technology
(enable/disable selectable)
Halftoning process: AAS (Auto Area Segmentation)
Enable/disable selectable
3 halftoning modes (A, B, and C) and
4 dither patterns (A, B, C, and D) for
bi-level and quad-level data
(2 downloadable dither patterns)
Gamma correction: 2 types for CRT display
3 types for printer
1 type for user-defined
L
GT-5500 Rev.C
A5 size Appendix A
July-18-97 Pass 0, DR
A-2 Technical Specifications