Real-time sensing and three-dimensional display of far outdoor scenes based on asymmetric integral imaging |
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| Affiliation: | 1. Department of Signal Theory, Telematics and Communications, CITIC-UGR, University of Granada, C/ Periodista Rafael Gómez 2, E-18071 Granada, Spain;2. Department of Analytical Chemistry, Faculty of Sciences, University of Granada, Av. Fuente Nueva s/n, E-18071 Granada, Spain;1. Advanced Center for Electrical and Electronics Engineering, Universidad Técnica Federico Santa María, Valparaíso, Chile;2. Electronic Engineering Department, Universidad Técnica Federico Santa María, Valparaíso, Chile;3. School of Electrical Engineering and Computer Science, The University of Newcastle, Australia;4. Large Binocular Telescope Observatory, Steward Observatory, University of Arizona, Tucson, AZ, USA;1. GOMNI-Grupo de Óptica e Modelagem Numérica, Faculdade de Tecnologia/UNICAMP, Limeira, SP, Brazil;2. Centre Spatial de Liège, Université de Liège, Belgium;3. Instituto de Física “Gleb Wataghin”/UNICAMP, Campinas, Brazil;1. School of Electrical Engineering, Yancheng Institute of Technology, Yancheng, 224051, China;2. School of Control Science and Engineering, Shandong University, Jinan, SD 250061, China;1. Department of Information and Communications, Pukyong National University, 599-1, Daeyeon 3-Dong, Nam-Gu, Busan, Republic of Korea;2. Department of Applied Mathematics, Pukyong National University, 599-1, Daeyeon 3-Dong, Nam-Gu, Busan, Republic of Korea |
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| Abstract: | A new asymmetric integral imaging (AII) system for real-time pickup and three-dimensional (3-D) display of far outdoor scenes based on dynamic-pixel-mapping (DPM) is proposed. DPM is a digital process to transform the elemental images captured with a lens array into the perspective-variant object images (POIs) whose structures are matched with those of display lenses, where the orders of pixels in each POI are reversely mapped, and then capture a set of virtual elemental images (EIs) at the specific depth planes from the back-propagated POIs. This DPM enables an asymmetrical use of pickup and display lens arrays, allowing the long-ranged pickup of far outdoor scenes and their resolution-enhanced 3-D reconstruction. Experiments with a pair of pickup and display lens arrays whose pitches and focal lengths are given by 7.5 mm, 30 mm and 1.2 mm, 8 mm, respectively, show that the effective pickup-range and resolution of the proposed system have been increased up to 6 m and 1600×1600 pixels, respectively, from 0.064 m and 480×480 pixels of the conventional systems employing the same pickup and display lens arrays. In addition, experiments with an implemented test bed confirms that the proposed system can provide real-time 3-D images in 25 frames per second. |
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| Keywords: | Real-time sensing Three-dimensional display Asymmetrical integral imaging Dynamic pixel mapping |
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