Universal Media Research Center

Kyoto, Japan

Universal Media Research Center

Kyoto, Japan
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Yoshida S.,Universal Media Research Center | Yano S.,NHK Science and Technical Research Laboratories | Ando H.,Universal Media Research Center
Journal of the National Institute of Information and Communications Technology | Year: 2010

This paper describes a novel glasses-free 3D display of 360° optimized for tabletop tasks. For sharing 3D virtual objects on a flat tabletop surface naturally, we assume that the following conditions should be satisfied: (1) the tasks should not be disturbed and the working spaces should not be occupied, (2) the 3D images should be observed from arbitrary directions around the table, and (3) special 3D glasses should not be required for natural communication around the table. In this paper, we propose and implement the 3D display "fVisiOn" which fulfils the above whole conditions. The display employs circularly arranged projectors and a cylindrical- or a conical-shaped optical device that has a directional optical characteristic. Those devices are installed underneath the table not to obstruct the working space. One of the novelties of the proposed method is forming a ring-shaped viewing area above the table. When users look in this area, they can observe individual 3D images from each direction with correct perspective on the table such as a centerpiece.


Katsumoto M.,Universal Media Research Center | Yamakata Y.,Kyoto University | Kimura T.,Universal Media Research Center
Journal of the National Institute of Information and Communications Technology | Year: 2010

We have been prototyping loudspeakers with radial directionality that differs in all directions (including longitudinally, vertically and laterally), and building systems that reproduce sound expressions of musical instruments in a 3D manner, as technology for faithfully reproducing a sound source according to physical laws as much as possible. In that process, we assumed that the presence of a sound source might be an important factor affecting how people perceive sound, in addition to the faithful reproducibility of a sound source by loudspeakers. We then conducted trial listening experiments to verify how much presence a sound source has, and evaluated performance of the prototyped loudspeakers. This paper introduces our prototyped loudspeakers and presents the results of those experiments.


Gurbuz S.,Universal Media Research Center | Kawakita M.,Universal Media Research Center | Ando H.,Universal Media Research Center
2010 4th International Universal Communication Symposium, IUCS 2010 - Proceedings | Year: 2010

In multi-view imaging, a number of cameras capture the same scene from different viewpoints for regeneration of the light rays which may be emitted by a special display for 3D visualization. However, there are many conditions such as spectral characteristics of the optics, lighting variations, and sensor characteristics that cause color variations among captured multi-view images; therefore, these variations cause difficulties in accurately reproducing color consistency in multi-view 3D imaging systems. As a result, color variations between the camera views may deteriorate viewer's 3D visualization experiences. The process employed to compensate for the color variations of inter-camera images is called multi-camera color calibration. In this paper, a color calibration method with respect to a reference camera for multi-camera systems is devised by utilizing a set of robustly detected stereo correspondences between camera pairs. The method results a 3x4 coefficient matrix multiplier that can be used for color correction operations rapidly. Objective evaluation of the experimental results shows that the proposed method can minimize the color differences between the captured multi-view images to an acceptable level relative to subjective evaluation results. ©2010 IEEE.


Gurbuz S.,Universal Media Research Center | Yano S.,Universal Media Research Center
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2010

We present a general concept of the proposed 3D imaging system called 3D-geometric camera (3D-gCam) to pick up pixel-wise 3D surface profile information along with color information. The 3D-gCam system includes two isotropic light sources placed at different geometric locations, an optical alignment system for aligning the light rays projected onto the scene, and a high precision camera. To determine the pixel-wise distance information, the system captures two images of the same scene during the stropping of the each light source. Then, the intensity of each pixel location in these two images along with the displacement between the light sources are utilized for calculating the distance information of object points corresponding to pixel locations in the image to generate a dense 3D point cloud. The approach is suitable for capturing of 3D and color information in high definition image format synchronously. © 2010 Copyright SPIE - The International Society for Optical Engineering.


Yano S.,Universal Media Research Center
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2010

We have developed several three-dimensional display systems that are matched to the human visual field characteristics. In this article, we describe our developed display systems, which are matched for the human communication in the close-range, medium-range, and distant rage categories. © 2010 SPIE.


Yoshida S.,Universal Media Research Center | Kawakita M.,Universal Media Research Center | Ando H.,Universal Media Research Center
3DTV Conference: The True Vision - Capture, Transmission and Display of 3D Video, 3DTV-CON 2011 - Proceedings | Year: 2011

We propose a glasses-free 3D display, named fVisiOn, that floats virtual 3D objects on a flat tabletop surface. The approach employs a combination of an optical device and a circularly arranged projector array. It reproduces a light field optimized for a seated condition at a certain volume and forms a ring-shaped viewing area. In this principle, the optical device must control the traveling direction of numerous rays passing the volume. An appropriate algorithm for supplying source images for the projector array should also be considered. This paper introduces several approaches for fabricating a variety of these optical devices in different shapes. Those devices work like a special screen by applying an anisotropic diffusion characteristic. We then propose an algorithm that generates source images and describe an implementationmethod for the 3D display as a system. The algorithm is confirmed from several 3D images generated by the system. © 2011 IEEE.


Arakawa Y.,Universal Media Research Center
Journal of the National Institute of Information and Communications Technology | Year: 2010

NICT has conducted research and development on ultra-high definition image and its transmission technologies to realize the next-generation communications, and completed the foundation for the 4K image and its transmission technologies with 4 times resolution of the HDTV (Hi- Vision) in the pioneer of the world. Moreover, NICT has succeeded in developing 4K3D image and its transmission technologies.


Inoue N.,Universal Media Research Center
Journal of the National Institute of Information and Communications Technology | Year: 2010

NICT is conducting research on Ultra-realistic communication since April in 2006. In this research, we are aiming at creating natural and realistic communication with people in remote places as if they are being there. For this research, we are studying 3D image technologies, 3D sound technologies, multisensory interfaces and also developing more objective measurement/ evaluation technique of feeling "presence" by using brain image and psychophysics. All of research results on Ultra-realistic communication are collected and published in this special issue. Preceding technical articles, outline of Ultra-realistic communication research is introduced in this section.


Ando H.,Universal Media Research Center | Liu J.,Universal Media Research Center | Kim D.W.,Universal Media Research Center
Journal of the National Institute of Information and Communications Technology | Year: 2010

This paper describes multi-sensory interaction technology developed in NICT. First, we describe the aim of multi-sensory technology and the overview of the multi-sensory interaction system. Second, we describe the methods for extraction and display of 3D images, haptic information, contact sounds and aroma, and the interaction techniques that can naturally provide the integrated sensory information to humans. Finally, the multi-sensory contents that we have produced are explained, and future issues and system applications of the multi-sensory technology are discussed.


Arakawa Y.,Universal Media Research Center
Journal of the National Institute of Information and Communications Technology | Year: 2010

NICT has conducted research and development on the 4K ultra-high definition image and its transmission technologies to realize the next-generation communications with 4 times resolution of the conventional HDTV (Hi-Vision), and completed the foundation for the 4K image technologies in the pioneer of the world. NICT's results on applied research and development based on the 4K image technologies are summarized in this paper. The author gives the prospect for applications of the 4K image technologies.

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