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24 January 2011 Predicting preferred coring level to reduce toner scatter in electrophotographic printing
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Proceedings Volume 7867, Image Quality and System Performance VIII; 78670A (2011)
Event: IS&T/SPIE Electronic Imaging, 2011, San Francisco Airport, California, United States
The electrophotographic process depends on a complex interplay between electrostatically charged toner particles, the developer roller, and the organic photoconductor during development; and between the toner particles, the organic photoconductor, and the paper during transfer. The task of controlling the imaging process is made even more challenging by the fact that colorant planes are developed independently and in succession. At high colorant levels, toner particles for a given colorant plane may be strongly repelled by toner that has already been deposited for previously developed colorant planes. The result is scattering of toner away from the edges of thin lines and character strokes. In previous work, we have proposed a coring method to reduce the occurrence of the toner scatter, and conducted psychophysical experiments to determine the preferred level of coring as a function of line width and colorant level. In this paper, we apply the edge transition width (ETW) metric to physically measure the impact of toner scatter on the sharpness of edges of lines and character strokes. We consider ETW both with and without coring, and compare it to the results from our earlier psychophysical experiments.
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Hyung Jun Park and Jan P. Allebach "Predicting preferred coring level to reduce toner scatter in electrophotographic printing", Proc. SPIE 7867, Image Quality and System Performance VIII, 78670A (24 January 2011);

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