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18 January 2010Moire-based autostereoscopic images by duplex printing on transparencies

Shen-Ge Wang¹

¹Xerox Research Ctr. (United States)

Proceedings Volume 7528, Color Imaging XV: Displaying, Processing, Hardcopy, and Applications; 75280Z (2010)https://doi.org/10.1117/12.839464
Event: IS&T/SPIE Electronic Imaging, 2010, San Jose, California, United States

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Abstract

In this paper we describe a method using duplex printing on transparencies to create auto-stereoscopic images viewed ina "see-through" manner. By choosing different halftone structures, differing by having different spatial frequencies foreach of the two sides of a transparency, a moire pattern resulting due to halftone overlapping can be observed. On oneside of the transparency is provided a uniform halftone with a selected median spatial frequencyf. On the other side, theprinting consists of two partitions: what is to be perceived as the background is printed using a halftone with spatialfrequency equal to the median frequencyf plus some ▵f, while a desired image partition is printed using a halftone witha spatial frequency equal to the median frequencyf minus the same ▵f. The spatial frequency difference between thehalftones on two sides creates a corresponding shift-magnification factorM. The moire produced by the two partitionprint images as visually located appear in two separate spatial planes as separated by the transparency, with an amplifiedtotal depth of the shift-magnification factorM times the thickness of the transparency. This yields a moire stereoscopicpattern for the desired image partition as clearly discernable to the human eye with out aid of lenses or other means.

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Shen-Ge Wang"Moire-based autostereoscopic images by duplex printing on transparencies", Proc. SPIE 7528, Color Imaging XV: Displaying, Processing, Hardcopy, and Applications, 75280Z (18 January 2010);https://doi.org/10.1117/12.839464

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