The conventional display can show only one screen, but it is impossible to enlarge the size of a screen, for example
twice. To solve this problem, the authors presented an enlarging method of display area using a mirror. Our
extension method enables the observers to show the virtual image plane and to enlarge a screen area twice. Although
the displaying region is doubled, this virtual display could not produce 3D images. In this paper, we propose a 3D
imaging display with an extended region using an angle-controlled unidirectional 4-views display.
The authors developed a prototype indication display system for route guidance. We suppose that this system is set up
in the public facilities especially a library. A city public library has a collection of many books. It is difficult for a
visitor to find the desired book from many books. But we can recently use a library search system for inquiring the
whereabouts of a book. The search system outputs a receipt which shows the search result. The destination is shown
in this receipt. Though the visitor carries about the receipt during the treasure hunting, that receipt will be a trash after
the arrival at his/her destination. The motivation of this research is to build the paperless whereabouts guide system.
The guidance system using an electronic display would be possible to provide us with route information to the desired
We developed a prototype virtual air touch interface system for interaction in the virtual 3D space. The spatial
imaging display system provides the observer virtual 3D objects. These 3D images are floating in the air and one can
directly touch objects or virtual images. To take mutual action we need to prepare the interface system which can
recognize that the user moves his hand near the virtual objects. Because a conventional touch-panel system detects the
user's operation on the display screen but the touching point differs from the actual displaying space, it is important to
realize that the user can operate at the same space. A typical method is to use the computer vision. In this paper, the
authors propose the interface system using a theremin which is a musical instrument having the unusual aspect of being
controlled by the performer's hand motions near the antennas.
The authors developed the revolving lantern using images of the holographic display. Our revolving lantern playbacks
the virtual images which are floating in the air. These spatial images have unexpected motions and changes. The
prototype imaging unit consists of the hologram, turn table and illumination system which can change the light with 1/f
fluctuation so as to reconstruct various spatial images. In this paper, we describe the spatial imaging with a
holographic technology and the reconstruction system which playbacks the rotating motion and various images.
A hologram playbacks images. These reconstructions are generally static images. The rotating image like a
revolving lantern can be produced when a hologram is spinning on the turn table. A hologram can record and
reconstruct various images using the different illumination. When the illumination system changes the illumination
light, a hologram reconstructs other images.
In addition to the great advancement of high-resolution and large-screen imaging technology, the issue of color is now receiving considerable attention as another aspect than the image resolution. It is difficult to reproduce the original color of subject in conventional imaging systems, and that obstructs the applications of visual communication systems in telemedicine, electronic commerce, and digital museum. To breakthrough the limitation of conventional RGB 3-primary systems, "Natural Vision" project aims at an innovative video and still-image communication technology with high-fidelity color reproduction capability, based on spectral information. This paper summarizes the results of NV project including the development of multispectral and multiprimary imaging technologies and the experimental investigations on the applications to medicine, digital archives, electronic commerce, and computer graphics.
The multiband video camera and display system has developed to increace quality of the video image. The multiband means that there has more than three color channels. The new applications can be created by increasing the number of camera primaries, for example an influence of illumination can be fixed accurately. Furthermore, increasing number of primaries gives a good possibility for image and video processing. However, the growed amount of data causes problems for data transform, store, and process. In this paper, we introduce six band video capturing system and our spectral video database. In the database there is a lot of different type of video clips and the size of spectral video database is more than 300 giga bytes (GB). We also have developed compression scheme for spectral video based on principal component analysis (PCA) and JPEG2000 methods. Here, we concentrate to compress spectral video sequence frame by frame.
To preserve museum collections of works of art, these collections are often photographed for display in digital museums. However, conventional photography cannot capture spectral characteristics of objects. In this paper, we describe a 16-band camera system designed to produce spectral images of ancient paintings. Results of color reproduction of captured images and results of spectral analysis of images of ancient paintings are also presented. The camera consists of a 2000×2000-pixel CCD, a rotational filter turret with 16 interference filters, and a PC-based image capturing and displaying unit. The camera's lens is interchangeable, and it enables two or more different view sizes. Each band image of the camera can be focused independently, and it reduces longitudinal chromatic aberration. A stroboscope is used for lighting, and the rotational filter turret and electrical shutter of the CCD have been synchronized with it. An electric motor-driven photographic platform is used to enable photographing large objects in several shots. We evaluated the results of color estimation for an image taken by this camera using the GretagMacbeth ColorChecker 24-color chart. The average ΔEab was 2.09 (maximum ΔEab was 4.03). Spectral reflectance were used to analyze a degraded area on an ancient painting.
The architecture of color reproduction system based on spectral information is addressed. This system aims to realize the accurate color reproduction under arbitrary illuminants and color matching functions and anticipates the ultimate reproduction of spectral reflectance and spectrum of objects. This system is like an expanded version of that proposed by the International Color Consortium (ICC). One of the features of this system is the usage of the spectral space for the profile connection space alternative to the colorimetric space. It retains compatibility with the indigenous color management functions of the current system. The proposed system is further expanded to construct the spectrum-based color reproduction system for motion picture. Six-band HDTV camera and six-primary projection display system, which is realized in our laboratory as experimental spectrum-based color reproduction system for motion picture, is briefly introduced.