Image Quality
IMAGE QUALITY
BERTL evaluates the output of several "test targets" in
order
to
determine
image
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.
Flesh tones - 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
11.
Density of Solid Areas*
Copy Density
Black
1.76
Cyan
1.17
Magenta
0.94
Yellow
1.12
*Density is on a scale of 0 to 2.5, with 2.5 being the best possible.
Copy & Print Resolution*
Copy Resolution
Vertical
Horizontal
Black
4.5
Cyan
--
Magenta
--
Yellow
--
*Line Pairs per Millimeter. For copy resolution, higher is better (range,
2.0-8.0); for printer resolution, lower is better (range, 1.0-5.0).
Print Halftones
Min. Gradation*
Black
Cyan
Magenta
Yellow
*Minimum gradation is on a scale of 10 – 100 percent in 10 percent
increments.
The best possible minimum gradation is 10 percent.
**Maximum gradation is on a scale of 10 – 100 percent in 10 percent
increments. The best possible maximum gradation is 100 percent.
Copyright © 2009 BERTL Inc.
All Rights Reserved. The license under which this document is made available and applicable law prohibit any reproduction or further transmission of any portion of this document. This
document may only be viewed electronically through the www.BERTL.com Web site and may not be stored in electronic or hard copy format. Any reproduction of trademarks is strictly
prohibited. BERTL accepts no responsibility for any inaccuracies or omissions contained in this document.
quality.
Following
Print Density
1.70
1.26
0.91
1.11
Print Resolution
Vertical
Horizontal
4.5
2
--
2
--
2
--
3
Max. Gradation**
10
100
10
100
10
100
10
100
2
are
3
BERTL uses ImageExpert printer test targets for the evaluation of printed
image quality. BERTL technicians' measure image density and evaluate
the device's ability to produce a full range of halftones and various sizes
of negative/positive text, dots and lines in each primary printing color
(CYMK).
10
2
5
2
2
3
10
BERTL uses synthetic (photographic) test images obtained from ISO
International Standard 12640--Graphic Technology—Prepress digital
data exchange—CYMK Standard Color Image Data (CYMK/SCID) in
order to evaluate the ability to print photographic images.
September 2009
Xerox ColorQube 9203
www.BERTL.com
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September 2009
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