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Proceedings Paper

Softcopy banding visibility assessment
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Paper Abstract

Banding is a printer artifact perceived as one dimensional luminance variations across the print-out caused by the vibrations of different printer components. In the printing industry, banding is considered to be one of the worst defects that dominates overall perceived image quality. Understanding the visibility of banding will help us in developing strategies to reduce the banding artifact. We developed a softcopy environment to conduct various experiments for investigating the visibility of banding. This environment includes the methodology to duplicate the print on the monitor, and a banding extraction technique. This technique enables us to freely adjust the magnitude of banding of any printer. We validated the accuracy of this methodology by conducting a banding matching experiment. We used this platform to conduct banding visibility assessment experiments. One of them was a banding discrimination experiment. The results showed that for the printers investigated, a reduction of 6.5% in the banding magnitude will be just noticeable by an average observer. We were also able to find the detection thresholds of banding in grayscale images for three laser electrophotographic printers. The detection threshold of the best printer was about 50% of its original banding. So there is still plenty of room to reduce the visibility of the banding artifact. We were also able to compare the banding visibility of different printers quantitatively by conducting a cross-platform experiment. This methodology can form the basis for a metric for visibility of banding.

Paper Details

Date Published: 17 January 2005
PDF: 13 pages
Proc. SPIE 5668, Image Quality and System Performance II, (17 January 2005); doi: 10.1117/12.593684
Show Author Affiliations
Osman Arslan, Purdue Univ. (United States)
Zygmunt Pizlo, Purdue Univ. (United States)
Jan P. Allebach, Purdue Univ. (United States)

Published in SPIE Proceedings Vol. 5668:
Image Quality and System Performance II
Rene Rasmussen; Yoichi Miyake, Editor(s)

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