Naomi Inoue

gCubik: real-time integral image rendering for a cubic 3D display

gCubik provides a 3D visual experience, which is interactive and group-shared, by using a graspable cubic display. Users are presented with color, stereo and full motion parallax 3D scenes, viewable from any direction, without the need of special glasses. Newly designed wide field of view integral photography(IP) lens array are employed on each face of the display for its autostereoscopic effect. In our demonstration, real-time rendering of the IP images allows users to interactively manipulate the 3D objects in the scene via simple finger gestures.

gCubik: a cubic autostereoscopic display for multiuser interaction: grasp and group-share virtual images

Collaborative tasks requiring the sharing of an object can benefit from a compact, group-shared autostereoscopic display. We have analyzed the requirements for a cubic autostereoscopic display employing integral photography (IP). The display should be compact as well as graspable and viewable from any direction; thus suitable for group discussions. This paper describes the implementation of the gCubik display that realizes our conceptual prototype. We envision the application areas to include games and edutainment.

Glasses-free 200-view 3D Video System for Highly Realistic Communication

We investigate highly realistic communication systems using a super-multi-view three-dimensional (3D) video system. We propose and develop a glasses-free 200-view 3D display using almost 200 high-definition (HD) projector units to reconstruct such natural life-size 3D moving objects as cars and humans. We are also developing a 3D capturing system with HD camera units and researching multi-view video transmission techniques for demonstration experiments for the abovementioned highly realistic communication system.

Poster: Toward an Interactive Box-shaped 3D Display: Study of the Requirements for Wide Field of View

We propose a graspable box-shaped 3D display as a communication tool that allows multiple users to share and naturally interact with 3D images in face-to-face collaborative tasks. We envision an auto-stereoscopic 3D display featuring glasses- free and multi-viewpoint operation. Users should be able to view multiple faces in the box-shaped display simultaneously and from any direction. We employ the integral photography (IP) method for this purpose. In this paper, we first analyze the requirements for an IP lens allowing simultaneous multi-face viewing of 3D images in such a display. Consequently, we find that a mininum 120-degree field of view is necessary. Then, we design and prototype an IP lens that provides such a wide field of view. Visual inspection of the generated 3D images confirm the possibility of simultaneous multiple- face viewing with the proposed display.

Extensions of SVG for human navigation by cellular phone

In Japan, cellular phone service started in 1987 and spread all over Japan very quickly. With GPS receivers and high resolution LCD’s implemented into the cellular phone, the demand for human navigation by cellular phone is increasing. One of the typical ways that geographic information is presented for human navigation is a map. In order to browse a map on a cellular phone, high interactivity such as zoom-in, zoom-out and rotation of the map are considered essential functions. From this point of view, a vector graphics format is suitable. However, the conventional vector graphics formatting for a geographic information system can only be used in a specific system, and is not designed based on the architecture of the WWW. On the other hand, the W3C (World Wide Web Consortium) defined SVG 1.1 / Mobile (Scalable Vector Graphics) as the open WWW standard vector graphics format on January 14, 2003. SVG1.1/Mobile is defined for not only the PC, but also mobile terminals such as cellular phones. We have developed a map browser software based on SVG1.1/Mobile on cellular phones. This paper describes requirements of human navigation by cellular phone, and then proposes extensions of SVG in order to realize the requirements.

Automatic registration of multiple range views based on feature matching and feature-depth correspondences

Previous works that employed an automatic registration of multiple range views resorted to the use of corresponding 3D matching points in order to compute relative orientations. False 3D matches were detected by verifying their compliance with the parameteres of the orientations mathematical model computed in 3D space. In this research we introduce a new method to detect correct 3D matches. This method employs first the removal of the false 2D matches. Subsequently, 3D matches are detected by using the one to one correspondences provided by the scanning device between the 3D points and their corresponding 2D image projections. Due to its ability to detect the matching points in a fast manner, our method is suited for applications characterized by a 3D fast reconstruction demand. Experimental results with real object demonstrate the effectiveness of our method.

Glasses-free large-screen three-dimensional display and super multiview camera for highly realistic communication

Abstract. We studied highly realistic communication systems using a super multiview three-dimensional (3-D) video system. We propose the developed glasses-free 200-in. 3-D display using ∼200 high-definition (HD) projector units to reconstruct natural life-size 3-D moving objects, such as cars and humans. We also analyzed the optimal arrangement of the multiview camera system for the 3-D display. In the experiments, we developed a prototype super multiview 3-D camera system using compact HD video cameras with real-time convergence compensation circuits that correct the captured images via image processing optimized for the display. We also performed demonstration experiments using the developed 3-D display and camera system in a public area. As a result, we highlight several possibilities for actual applications of the glasses-free super multiview 3-D video system.

Real-Time Synthesis of Natural Head Motion on A 3D AVATAR from Reconstructed 3D Frontal Face Data

In this paper, we describe an algorithm for the synthesis of natural head motion on a 3D avatar from reconstructed 3D frontal face data with the goal of making 3D video games immersive, engaging and fun when played on 3D displays. The idea is that frame by frame natural head motion of a user is calculated without utilizing any markers from stereo image pair and transmitted to the avatar to generate realistic motion. Thus, the head motion is regenerated with the avatar in the video sequence in real-time. Obviously, the tools developed for these scenarios are applicable to other applications such as virtual space 3D teleconferencing with avatars or human-computer interface applications.

Effects of interaction ranges in genetic algorithms

We developed a dynamically separating genetic algorithm (DS-GA) using a variable selection range (DS-GAVSR). By comparing our DS-GAVSR with a simple GA, an island model GA, and a DS-GA, we found that selection range mainly affects convergence speed, while crossover range mainly affects long-term performance. We determined that DS-GAVSR performance is high for real-coded problems

A Study to Realize A Box-Shaped 3D Display: A Calibration Method to Align Lens Array and Display

We propose a handheld box-shaped 3D display as a communication tool for realizing natural human-object interactions in face-to-face communications. The display employs an integral photography technique for each surface. However, misalignment of the lens array and the LCD module occurs, and so adjustment is necessary. In this paper, we analyze the error factors caused by this misalignment and propose a convenient calibration method to minimize them. The method estimates the actual positions of each lens using one camera and several stripe pattern images. After brief manual alignment the method computes the calibration parameters. We verify the suitableness of the proposed method by applying the computed parameters into the image-rendering process.