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May. 18, 07
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Page 9
May 2007
Xerox Phaser 6180DN
IMAGE QUALITY
BERTL evaulates the output of several “test targets” in
order to determine image quality. Following are
descriptions of key elements of image quality. Note the
numbered examples on each of the test targets shown in
the right column.
Office Color Image Quality
1.
Density of Solid Areas -
Better contrast; more vivid overall images
2.
Line Work -
Better production of lines and text
3.
Halftones -
Better production of photographic and screened images
4.
Negative/Positive -
Better production of fine detail
Photographic Color Image Quality
5.
Fleshtones -
Better production of portraits
6.
Banding -
Better solid and dithered fill
7.
Low Contrast -
Better production of dark images
8.
Saturation -
Better production of bright colors
9.
Caste
– Better color fidelity
10.
Fine Detail
– Better reproduction of fine details
0.00
0.20
0.40
0.60
0.80
1.00
1.20
1.40
1.60
Higher = Better
Black
Cyan
Yellow
Magenta
Office Color Image Quality
Resolution and Image Density
Print Resolution
Horizontal
Print Resolution
Vertical
Print Density
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5 = B
e
s
t
Fleshtones
Banding
Low Contrast
Saturation
Caste
Fine Detail
Printed Photo Image Quality
Photo Quality
Attribute
BERTL uses ImageExpert printer test targets for the evaluation of printed
image quality. BERLT technicians measure image density and evaluate
the device’s ability to product a full range of halftones and various sizes of
negative/positive text, dots and lines in each primary printing color
(CYMK).
BERTL uses synthetic (photographic) test images obtained from
ISO
International Standard 12640--Graphic Technology—Prepress Digital
Data Exhange—CYMK Standard Color Image Data (CYMK/SCID)
in
order to evaluate the ability to print photographic images.
BERTL technicians use an X-Rite 408 Color Reflection Densitometer in
order to measure color density and dot gain of prints and copies.
Image Quality
1
1
1
1
2
3
4
5
5
5
5
6
7
8
9
10
10
10
10
10
10
8
