1-6
A-61159 May 2002
Image Quality
Features
Bitonal Scanners
• Built-in Adaptive Threshold Processing (ATP), image compression,
despeckle, and dithering for bitonal scanning
• Perfect Page scanning technology (Scanner 3520D/Scanner 3520DP
only) with better edge detection (which assists in providing superior
deskew and ultimately sharper, crisper characters)
• Image capture resolution: 600 dpi
• Image output resolution: 200 dpi and 300 dpi
Color Scanners
• Built-in Adaptive Threshold Processing (ATP), image compression,
despeckle, and dithering for bitonal scanning
• Auto-color balancing (auto-white balancing) to ensure good color
balance after calibration
A white spot just outside the imaging area (located on the
front imaging guide for Color Scanner 3590C and on the
front and rear imaging guides for Color Scanner 4500D and
Color Scanner 4500DP) is used as a constant reference to
compensate for changes in lamp brightness
• Pixel and color correction for the best color image quality
• Multiple color tables available from within the Diagnostic Software
(for the TWAIN device driver only) to optimize color image quality
(Color Scanner 4500 only)
• Dual stream (simultaneous color and bitonal) output available
(Color Scanner 4500 only)
• JPEG compression allows images to be viewed in many
image viewers
• Image capture resolution: 600 dpi for bitonal scanning
(Color Scanner 3590C only); 150 dpi for color scanning
• Image output resolution: 200 dpi and 300 dpi for bitonal scanning
(Color Scanner 3590C only); 100 dpi and 150 dpi for color scanning
Paper Transport
Features
• Automatic and manual feeding
• Top entry, bottom exit paper transport
• Multifeed detection (by document length in Scanner 3500; by
document length and/or document thickness in Scanner 3510,
Scanner 3520, Color Scanner 3590C, and Color Scanner 4500)
• Automatic feeder with operator-assisted “infinite” and
single-sheet feeding