15 February 2011 Pixel-offset position detection using lens array for integral three-dimensional display
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Abstract
An integral 3DTV system needs high-density elemental images to increase the reconstructed 3D image's resolution, viewing zone, and depth representability. The dual green pixel-offset method, which uses two green channels of images, is a means of achieving ultra high-resolution imagery. We propose a precise and easy method for detecting the pixel-offset distance when a lens array is mounted in front of the integral imaging display. In this method, pattern luminance distributions based on sinusoidal waves are displayed on each panel of green channels. The difference between phases (amount of phase variation) of these patterns is conserved when the patterns are sampled and transformed to a lower frequency by aliasing with the lens array. This allows the pixel-offset distance of the display panel to be measured in a state of magnification. The relation between the contrast and the amount of phase variation of the pattern is contradicted in relation to the pattern frequency. We derived a way to find the optimal spatial frequency of the pattern by regarding the product of the contrast and amount of phase variation of the patterns as an indicator of accuracy. We also evaluated the pixel-offset detection method in an experiment with the developed display system. The results demonstrate that the resolution characteristics of the projected image were refined. We believe that this method can be used to improve the resolution characteristics of the depth direction of integral imaging.
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Hisayuki Sasaki, Hisayuki Sasaki, Masahiro Kawakita, Masahiro Kawakita, Kenichiro Masaoka, Kenichiro Masaoka, Jun Arai, Jun Arai, Makoto Okui, Makoto Okui, Fumio Okano, Fumio Okano, Yasuyuki Haino, Yasuyuki Haino, Makoto Yoshimura, Makoto Yoshimura, Masahito Sato, Masahito Sato, } "Pixel-offset position detection using lens array for integral three-dimensional display", Proc. SPIE 7863, Stereoscopic Displays and Applications XXII, 78631Z (15 February 2011); doi: 10.1117/12.872694; https://doi.org/10.1117/12.872694
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