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ISPDI 2013

Byoungho Lee (Seoul National University,Korea)

Title: Integral and Light Field Imaging for 3D Display and Imaging
Author: Byoungho Lee
Author affiliation: Seoul National University (Korea)
Address: School of Electrical Engineering, Seoul National University, Gwanak-gu Gwanak-ro 1, Seoul 151-744, Korea, Tel: +82-2-880-9570, Fax: +82-2-873-9953, E-mail: byoungho@snu.ac.kr
Presentation: Plenary talk

Integral imaging has been developed as one of the future 3D display technologies without glasses. After integral imaging was introduced by Lippmann in 1908, the 3D images that the integral imaging system provides have become realistic more and more with the improvement of the flat-panel display technologies. Unlike the multi-view display system, the integral imaging system provides continuous view images, and both of horizontal and vertical parallax. It allows observers to locate not at the exact observing distance but at the any point inside the viewing zone. Since the integral imaging system requires more data capacity than the multi-view display, integral imaging will be the intermediate technology after multi-view display and before holographic display.
By the way, the terminology ‘light field’ has been used in computer graphics field since 1990s. ‘Light field’ is a concept to express geometric optics in computational world, and the studies on light field have been presented to understand the behavior of light in real world. Although the light field analysis is valid in limited situation, the methodology is strong and adaptable to any case with the directional light rays.
From the theoretical backgrounds, a light field camera and a light field microscope were invented to capture the light fields from objects. The system is implemented with a capturing device and a micro lens array. Taking advantages of this structural simplicity, the light field capturing devices have been studied diversely and some of them have been already commercialized. Furthermore, the light field displays also have been proposed whose major aim is to reconstruct light field in the 3D space, in other words, 3D display.
3D displays and light field displays start from different backgrounds, but their functions are identical. Therefore, to understand the light field concept and to apply it on the 3D display systems are important to advance the 3D display research field. On the other hand, it is possible to convert the light field from the light field capturing devices into the elemental image for integral imaging. In this plenary talk, I analyze the autostereoscopic 3D display systems with the light field theory, and present the way to utilize light fields captured from a light field microscope as a source of integral imaging system. The duality between integral imaging and the light field imaging shows that the reconstruction of the light in real space can be described in one language, geometric optics.  
Keywords: Light field imaging, 3D display, integral imaging

Brief Biography
Byoungho Lee received his Ph.D. degree from the Department of Electrical Engineering and Computer Science, University of California at Berkeley in 1993. He has been in the faculty of the School of Electrical Engineering, Seoul National University since September 1994. Professor Lee is a Fellow of IEEE, OSA and SPIE, and a Member of the Korean Academy of Science and Technology. He served as a Director-at-Large of OSA, chair of the Member and Education Services Council of OSA, chair of the Holography and Diffractive Optics Technical Group of OSA, and currently he is chairing Fabrication, Design and Instrumentation Technical Division of OSA. Currently he is on the editorial board of Optics Letters, Light: Science and Applications, and Journal of the Society for Information Display. He has served on the editorial board of Applied Optics and Japanese Journal of Applied Physics as well as the editor-in-chief of the Journal of the Optical Society of Korea. He has received several distinguished awards such as the Scientist of the Month Award of Korea (Sep. 2009), the Academic Award of the Optical Society of Korea (2006) and the Academic Award of Seoul National University (2013). Currently, he is Vice-President of both Optical Society of Korea and the Korean Information Display Society.


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