ELECTRONIC PRINTING

Nonlinear resampling for edge preserving moire´ suppression

[+] Author Affiliations
Dimitri Van De Ville, Koen Denecker

Ghent University, ELIS/MEDISIP, Sint Pietersnieuwstraat 41, B 9000?Ghent, Belgium

Wilfried Philips

Ghent University, TELIN, Sint Pietersnieuwstraat 41, B 9000?Ghent, Belgium

Ignace Lemahieu

Ghent University, ELIS/MEDISIP, Sint Pietersnieuwstraat 41, B 9000?Ghent, Belgium

J. Electron. Imaging. 9(4), 534-547 (Oct 01, 2000). doi:10.1117/1.1289535
History: Received Oct. 20, 1999; Revised June 15, 2000; Accepted June 29, 2000
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Abstract

Printing applications using classical halftoning need to resample the original image to a screen lattice. This resampling can cause undesirable moire´ artifacts in the screened image. Some printing techniques, e.g., gravure printing, are highly susceptible to moire´, not only because of the low resolution screen lattices they employ but also because the degree of freedom in constructing halftone dots is limited by the physical constraints of the engraving mechanism. Current resampling methods compute new samples by simple interpolation techniques that cannot prevent sampling moire´ very well. Therefore precautions against moire´ have to be made in the prepress phase, which is not practical and sometimes not feasible. A novel technique is presented to adaptively resample an image on the screen lattice using a local estimate of the risk of aliasing. The purpose is to suppress moire´ while maintaining the sharpness of the image. Experimental results demonstrate the feasibility of the proposed approach. © 2000 SPIE and IS&T.

© 2000 SPIE and IS&T

Citation

Dimitri Van De Ville ; Koen Denecker ; Wilfried Philips and Ignace Lemahieu
"Nonlinear resampling for edge preserving moire´ suppression", J. Electron. Imaging. 9(4), 534-547 (Oct 01, 2000). ; http://dx.doi.org/10.1117/1.1289535


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