Performance and Image Quality
Xerox® DocuMate® 4799 and 4790
3-2
Performance and Image Quality Expectations Guide
Other factors, such as the color depth and resolution (dpi – dots per inch) of the scanned
image, as well as the scanning interface itself, also contribute to the overall speed of the
scanner. The Reference Scanner was connected to the FreeFlow Makeready PC via an Ultra-
Wide SCSI interface, which provides the best performance especially for high volume scanning
operations (large data). The Xerox DocuMate 4799 utilizes a Hi-speed USB 2.0 interface, which
offers plug-and-play convenience and is more widely used in the industry today.
FreeFlow Makeready allows customers to scan black and white or color documents and save
them as RDO (Raster Document Object) or Adobe PDF (Portable Document Format) files.
Makeready provides two options for saving scanned documents as PDFs: a
Xerox
option and
an
Acrobat
(Distiller) option. Both options produce an Adobe PDF file, however, the resulting
file size may vary depending on the option selected and/or the scanner driver.
Performance at a Glance
Reference Scanner
Xerox DocuMate 4799
Scan Speeds
(20 page, 8.5" x 11" landscape document at 600 dpi)
Black & White
Simplex
Duplex
File Size
Grayscale
1
Simplex
Duplex
File Size
Color
Simplex
Duplex
File Size
Overall
Fair
Good
Very Good
1
In order to simulate grayscale (8 bits per pixel), the Reference Scanner captures halftone
images at 1 bit per pixel (black and white) and renders them using halftone screening. Refer to
Image Quality
for more information
