ITE Technical Report
Online ISSN : 2424-1970
Print ISSN : 1342-6893
ISSN-L : 1342-6893
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27.10
Displaying 1-12 of 12 articles from this issue
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  • [title in Japanese]
    Article type: Cover
    Pages Cover1-
    Published: February 07, 2003
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.27.10.0_Cover1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • [title in Japanese]
    Article type: Index
    Pages Toc1-
    Published: February 07, 2003
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.27.10.0_Toc1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • Linear Multi-Primary Color Separation for an Arbitrary Sets of Primaries
    Hideto Motomura
    Article type: Article
    Session ID: IPU2003-1
    Published: February 07, 2003
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.27.10.0_1
    CONFERENCE PROCEEDINGS FREE ACCESS
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    An algorithm of multi-primary color separation, which can control display system colorimetrically, is proposed in this paper. The proposed method is available for not only RGB 3-primary display but also over-4-primary display. Colorimetric accuracy is evaluated with 6-primary DLP^<TM> projector. CIELAB color difference between target colors and reproduced colors is 0.8 on average and 2.9 at maximum.
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  • Role of Mesh Electrode in Field-emitter Image Sensor
    M. Nanba, Y. Takiguchi, K. Osada, K. Miyakawa, S. Okazaki, T. Yamagish ...
    Article type: Article
    Session ID: IPU2003-2
    Published: February 07, 2003
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.27.10.0_5
    CONFERENCE PROCEEDINGS FREE ACCESS
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    To clarify the role of the mesh electrode in a field-emitter image sensor, two types of exoerimental sensors with/without the mesh electrode were fabricated and their characteristics comoared. The results agree with the known effect that a mesh electrode suppresses the electron beam soread that causes the resolution characteristics to deteriorate. They also revealed that 1)the sensor with the mesh electrode could readout the signal charges keeping the HARP'S surface Dotential low, and 2) the mesh electrode grounded with a large caDacitor reduced the noise mainly due to the horizontal driving Dulses of the cathode electrodes.
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  • Fixed Pattern Noise Reduction for a CMOS Image Sensor Overlaid with a HARP Film
    Toshihisa WATABE, Hiroshi OHTAKE, Masahide GOTO, Hirotaka MARUYAMA, Ke ...
    Article type: Article
    Session ID: IPU2003-3
    Published: February 07, 2003
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.27.10.0_9
    CONFERENCE PROCEEDINGS FREE ACCESS
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    We have been studying a solid-state HARP image sensor in developing a highly sensitive solid-state imaging device. This device reauires a CMOS image sensor with a high signal-to-noise ratio (SNR) to make full use of the ootential of HARP film. We developed the device by using a charge-transfer circuit. However, row-to'row and pixel-to-pixel fixed pattern noise (FPN) appeared in images we took. We tried to solve these oroblems by applying a new ooeration method to the oixels for reading and resetting signals. Experimental results showed that the prototype's row-to-row and pixel-to-pixel FPN were improved by 40 and 2 1 dB, respectively, comoared with a conventional sensor that has a charge-transfer circuit.
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  • The depth tolerance of a 3D camera which generates high-density directional images
    Hiroshi YOSHIKAWA, Yasuhiro TAKAKI
    Article type: Article
    Session ID: IPU2003-5
    Published: February 07, 2003
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.27.10.0_13
    CONFERENCE PROCEEDINGS FREE ACCESS
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    We have already orooosed a natural 3 D display which is based on high-density generation of directional images. In order to display real 3D scenes, the most promising 3D camera technique is the generation of high-density directional images from multiple images caotured by horizontally aligned multiple cameras by using an interpolation algorithm. In this study we examined four different simple interpolation algorithms. An algorithm that utilizes one reoresentative object distance as a oriori was found to be the most effective one. This technique enables a fast interpolation. There, however, is a tradeoff!jetween the number of cameras and the depth of3D objects. The allowable depth for 3D objects is renorted.
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  • Development of 3D Interactive Processor (1) : Video-rate Synchronization of Computer Array
    Takaaki KUDO, Yasuhiro TAKAKI
    Article type: Article
    Session ID: IPU2003-6
    Published: February 07, 2003
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.27.10.0_17
    CONFERENCE PROCEEDINGS FREE ACCESS
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    We have already constructed a natural 3D display which generates 64 directional images simultaneously. We are also developing a 3D interactive processor to enable the 3D display to display 3D moving images and to irodate 3D images interactively. lt is implemented in a computer array which consists of 64 PC's. ln this study we report the video-rate synchronization of the computer array by using the broadcast mechanism ofTCP/IP socket communications on the ethernet.
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  • Implementation of textured high-resolution 3D scanner based on IBM&R
    Satoshi KURIHARA, Tatsuya SAITO, Kenji KOHIYAMA
    Article type: Article
    Session ID: IPU2003-7
    Published: February 07, 2003
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.27.10.0_21
    CONFERENCE PROCEEDINGS FREE ACCESS
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    In this paper, we will propose a new textured 3D model scanning methodology based on IBM &R, and its implementation. Up to now, we have orooosed the scanning methodology, which was the initial version of it, used slit light sources and took photographs of a object like CT scan. By this methodology we could get high-resolution 3D model simplicity, but it had the following oroblem: the inherent color information of the object could not get by the slit light source. So, this time, we will propose a new methodology to enable to simultaneously use general light sources at the scanning ohase by the slit light sources.
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  • A study for improvement of accessibility to distributed digital archives
    Yasuhiko Watanabe, Toshiyuki Kurahashi, Yoshikatsu Kishida, Yukio Toku ...
    Article type: Article
    Session ID: IPU2003-8
    Published: February 07, 2003
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.27.10.0_25
    CONFERENCE PROCEEDINGS FREE ACCESS
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    This paper describes two new methods for improvement of accessibility of contents retrievals from distributed archives in network. One method uses user driven parameters such as access histories or previously defined conditions. The another method uses information driven parameters, e.g. links for related information for the retrieved contents. The trial system is realized to evaluate these methods using meta server for accessing multiple image databases. Experimental results show the improvement of accessibility to distributed digital archives through these methods.
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  • An automatic object extraction based on an energy-minimizing method by usins the 3D geometry model
    Shunrou Fujiwara, Akio Doi, Koichi Matsuda, Masashi Kameda
    Article type: Article
    Session ID: IPU2003-9
    Published: February 07, 2003
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.27.10.0_29
    CONFERENCE PROCEEDINGS FREE ACCESS
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    In this paper, we propose a method to extract a 3D geometry model automatically from a 3D image data(volume data) by the simple model which has a curved surface such as cylinder or sohere. The geometry model which is used in our method is the deformable model based on a energy-minimizing method. By using the geometry model, the commitational cost is less than the orevious method because the shape is as slimilar as that of the resion in a volume data to extract. Consequently, our method is useful fbr extracting a 3D geometry model like the shape of cvlinder and that of sohere fom a volume data.
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  • [title in Japanese]
    Article type: Appendix
    Pages App1-
    Published: February 07, 2003
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.27.10.0_App1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • [title in Japanese]
    Article type: Appendix
    Pages App2-
    Published: February 07, 2003
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.27.10.0_App2
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (76K)
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