ITE Technical Report
Online ISSN : 2424-1970
Print ISSN : 1342-6893
ISSN-L : 1342-6893
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21.35
Displaying 1-10 of 10 articles from this issue
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  • [title in Japanese]
    Article type: Cover
    Pages Cover1-
    Published: June 10, 1997
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.21.35.0_Cover1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • [title in Japanese]
    Article type: Index
    Pages Toc1-
    Published: June 10, 1997
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.21.35.0_Toc1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • A multiple imaging system using holographic optical element for laser machining
    Tomohiro Sasagawa
    Article type: Article
    Pages 1-6
    Published: June 10, 1997
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.21.35.0_1
    CONFERENCE PROCEEDINGS FREE ACCESS
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    We propose a novel excimer laser machining using a multiple imaging system employing a holographic optical element (HOE). The HOEs that we used were computer generated phase holograms. We calculated the HOE by with three-step optimization using a direct binary search algorithm. The optimized HOE pattern was 4-level, and the matrix size was 1024×1024 with 1 micron pixels. With the use of this HOE, the 95 holes whose diameter was 0.1 mm were drilled in a 10×10 mm area. The energy availability was 19.4%.
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  • A Study of Binarization Method for Character Image Taken with CCD Camera
    Ginga NAGAMINE, Tsuyoshi YAMASHIRO, Chushin AFUSO
    Article type: Article
    Pages 7-12
    Published: June 10, 1997
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.21.35.0_7
    CONFERENCE PROCEEDINGS FREE ACCESS
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    There are various ways to binarize images automatically. Our study is how to binarize character images which were taken under bad lighting conditions with CCD camera. We propose a linear equation for threshold and the adaptive image segmentation. The dynamic thresholding by this method makes these shading images well binarized in quality.
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  • A Study of Recognition for Okinawan Syamisen Score (KUNKUNSI)
    Sanetoshi SOKEI, Tsuyoshi YAMASHIRO, Zensei IHA, Minoru TOGUCHI
    Article type: Article
    Pages 13-18
    Published: June 10, 1997
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.21.35.0_13
    CONFERENCE PROCEEDINGS FREE ACCESS
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    Handwritten character recognition has been increasing for its importance and has been expanding its application areas. In this paper, we propose the recognition system of musical score, and as one of the applications we tried to perform the Okinawan syamisen by the recognized data. The recognition system is composed of a simple, fast feature extraction method, and as an efficient way we used both the fast recognition method (Three-Dimensional Table Method) and the exact recognition method (Euclid Distance). In recognition experiments using musical score (2010 Characters), we have obtained a recognition rate of 95.3 [%], which is the efficient combination method.
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  • A Study of Recoginition System about Free Handwritten Roman Characters
    Satoru ODO, Tsuyoshi YAMASHIRO, Minoru TOGUCHI
    Article type: Article
    Pages 19-23
    Published: June 10, 1997
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.21.35.0_19
    CONFERENCE PROCEEDINGS FREE ACCESS
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    The recognition by computer of handwritten characters has been the subject of discussion for many years, because of being increasing its importance. In this paper, we propose the simple character recognition system of free handwritten characeters. This system is given by a structure analytic techique, and we used end points, corner points, 3 fork points, and crossing points as its features. As the result of the recognition experiments using 7800 characters, we have obtained a recognition rate of 85.4 [%].
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  • High Sensitive Photodetector using Field Emitters : Wide Dynamic Range
    Kazuaki Sawada, Nobuhisa Matumura, Takeshi Masuda, Takao Ando
    Article type: Article
    Pages 25-30
    Published: June 10, 1997
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.21.35.0_25
    CONFERENCE PROCEEDINGS FREE ACCESS
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    The back illumination type photosensitive field emitter was fabricated by depositing p-type a-SiC : H/intrinsic a-Si : H photodiode on the back surface of nongated n-type cone-shaped Si emitters by using plasma CVD methode. The emission current corresponding with illumination intensity was observed and the quantum efficiency of about 0.7. However, the emission current has tendency to be saturated at high illumination level. To expand the dynamic range of the photodetector, the photosensitive field emitter composed of gated field emitter and p-type a-SiC : H/intrinsic a-Si : H photodiode film was demonstrated.
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  • A High Voltage MOS Transistor for Solid-state Imager with Avalanche Multiplier Film
    Hiroshi Ohtake, Miho Nakayama, Masahito Yamauchi, Toshifumi Tajima, To ...
    Article type: Article
    Pages 31-37
    Published: June 10, 1997
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.21.35.0_31
    CONFERENCE PROCEEDINGS FREE ACCESS
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    We studied a MOSFET which suits with a readout transistor on a solid-state imager in which MOS scanner is combined with an avalanche photoconversion layer. The MOSFET requires high endurance voltage because high voltage is applied between the scanner and the photoconversion layer to get high multiplication gain using avalanche phenomenon. In this paper, a new MOSFET structure, which can increase the endurance voltage by attaching an electric field relaxation layer to the drain contact of the MOSFET, is described. The device parameters for fine readout operation were decided by calculations using a process-device simulator. The electric field relaxation layer was confirmed to work effectively because endurance voltage of 60V was obtained on fabricated test devices.
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  • A study on color imaging for HDTV and NTSC using one-chip CCD
    Toshinori SAITOH, Masayuki SUGAWARA, Yoshihiro FUJITA
    Article type: Article
    Pages 39-44
    Published: June 10, 1997
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.21.35.0_39
    CONFERENCE PROCEEDINGS FREE ACCESS
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    To develop small, high-quality cameras, we have been studying an imaging method for NTSC using a single-chip HDTV CCD. The arrangement of the color filter array is the key issue for reproducing color images and improving color image quality for both HDTV and NTSC. Since two-pixel and four-pixel mixing are required to generate signals for both scanning systems, there are only a few choices for the color filter arrangement. The vertical stripe filter array is one possibility that satisfies the operational requirements, but it has poor horizontal resolution characteristics. In this paper, we propose a new color filter array and color separating method. The new filter array has a quincunx sampling structure for different color signals, which improves the color resolution, and it is easy to separate color signals for NTSC. Using simulations, we compare the quality of images from our filter to that of images reproduced by a vertical stripe filter array.
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  • [title in Japanese]
    Article type: Appendix
    Pages App1-
    Published: June 10, 1997
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.21.35.0_App1
    CONFERENCE PROCEEDINGS FREE ACCESS
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