While the World IT Show was going on in the COEX, international 3D experts gathered there for an International Workshop on 3D Information Technology (3DIT 2010) hosted by the 3D Display Research Center (3DRC) of Kwangwoon University on the 26th of May. Sponsored by the Ministry of Knowledge Economy of Korea, the National IT Industry Promotion Agency and Kwangwoon University, the workshop finished successfully and gained a good response from attendants. There were four experts who presented their recent studies and it started with Tomoyoshi Shimobada's presentation.
Tomoyoshi Shimobada, An Associate Professor in Chiba University
Holography is the technology which is able to record and reconstruct an existing three dimensional object on a photographic plate. And CGH (computer-generated hologram) uses liquid crystal display instead of a photographic plate and it can generate 3D computer graphics without any difficulties. CGH is the ideal approach for the 3D display industry but there is a problem. It is time consuming! It takes an enormous time to calculate the CGH. To overcome this problem, they have been trying to develop the fast CGH calculation systems since 1992. FPGA (field programmable gate array) and GPU (graphic processing units) are the solutions they found. With FPGA and GPU, the CGH calculation time could be accelerated.
Osamu Matoba, Professor of Kobe University, Japan
Since this year is the second time to present at the work shop for Osamu Matoba, he was very happy and said, "Korea, Japan and other countries are working together on development for the 3D industry and this workshop boosts that."
Osamu Matoba explained the 3D display and 3D sensing based on the electronic and digital holography for 3D television, at the workshop. Approaches for wavefront reconstruction of 3D objects with a wide-viewing zone were presented. However, there is a limit, so widening the viewing zone is what he and his team mainly focused on. The techniques are amplitude modulation by electronic holography and phase modulation by wavefront reconstruction.
In a wide-viewing zone, brightness of the reconstructed 3D object is the thing needs to be fixed. The power of light is not sufficient so they suggested a method to use coherent amplification by employing a polymer dye. Basically coherent amplification uses a stimulated emission of radiation in the poly dye, so that is much bright and clear to see.Also he explained about 3D sensing and now they are working on the instantaneous recording systems based on a spatial domain phase-shifting digital holography.
Cho Myungjin from University of Connecticut, USA
He started the presentation by saying, "While Samsung and LG have revealed 3D products, these are not based on the real 3D technology. Even though these stereoscopic 3D displays are simple and easy to implement, they usually cause side effects of so-called human factor problems. Therefore, real 3D display technologies were suggested." This real 3D imaging and display method can provide unique properties of full-parallax and continuous viewpoints without any visual fatigue."
One of these real 3D technologies is integral imaging. Then what is integral imaging It is a 3D imaging method based on a lenslet array. Of course, with this integral imaging technology a natural and lifelike 3D image can be displayed. A Computational integral imaging reconstruction (CIIR) algorithm can reduce the effects of occlusion and can be operated by using a simple algorithm of summed absolute difference (SAD).
He also suggested Pixel of the Elemental image Rearrangement Technique (PERT) for implementing computational 3D integral imaging. PERT is the technique that magnifies the image, calculates the image, sorts positions and then reconstructs image. PERT delivers clear images with a low resolution.
Andrew Fei, Deputy Secretary-general of China 3D industry Association
The China 3D industry Association (C3D) is now responsible for coordinating the development of 3D standards, promoting 3D industries, R&D of 3D core technologies and many other things. They aim at leading industrialization by advancing the information technology. China is going to enhance the 3D entertainment services, 3D business and industrial applications. Recently the C3D reported that the market size of 3D cells and 3DTVs is going to be increasing and since they have a weak points in 3DTVs and 3D monitors, China is going to cooperate with other countries to get know how.
Yue Liu, Professor of Beijing Institute of Technology (BITC)
A more direct and natural viewing pattern is possible with 3D displays. And BITC is focused on optics, mechanics, electronics and computer science, among other things. A new multiple projector-based true color volumetric display method was proposed in the field of real volumetric 3D displays. It is combined with the optically floating image system, true 3D display system, and human computer interaction and touchable 3D system, so that user interaction can be improved.
Kim Eun-Soo, Director of 3D Display Research Center (3DRC), Kwangwoon University
Kim Eun-Soo, Director of the 3D Display Research Center of Kwangwoon University stated that, "3D experts from America, Japan, China and Korea have attended this workshop to introduce their current R&D activities on 3D systems and applications and to share information on newly developed 3D technologies." And he continued, "the 3D industry is indeed a promising business. We should pay more attention to develop and promote the 3D business and industry. Many kinds of 3D fusion industries are now springing up just by applying the 3D technology to the traditional and IT industries and they are expected to make a new blue ocean in the coming world market. To lead 3D global trends, Korea needs to develop human resources and systems. Also taking initiative on patents and authentication is important."