1 October 2000 Nonlinear resampling for edge preserving moire suppression
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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 moiré artifacts in the screened image. Some printing techniques, e.g., gravure printing, are highly susceptible to moiré , 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 moiré very well. Therefore precautions against moiré 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.
Dimitri Van De Ville, Koen N.A. Denecker, Wilfried R. Philips, Ignace L. Lemahieu, "Nonlinear resampling for edge preserving moire suppression," Journal of Electronic Imaging 9(4), (1 October 2000). https://doi.org/10.1117/1.1289535
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