Journal of Graphic Science of Japan
Online ISSN : 1884-6106
Print ISSN : 0387-5512
ISSN-L : 0387-5512
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Volume 32, Issue 4
Displaying 1-8 of 8 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1998 Volume 32 Issue 4 Pages 1-2
    Published: 1998
    Released on J-STAGE: August 25, 2010
    DOIhttps://doi.org/10.5989/jsgs.32.4_1
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1998 Volume 32 Issue 4 Pages 3-8
    Published: 1998
    Released on J-STAGE: August 25, 2010
    DOIhttps://doi.org/10.5989/jsgs.32.4_3
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1998 Volume 32 Issue 4 Pages 9-16
    Published: 1998
    Released on J-STAGE: August 25, 2010
    DOIhttps://doi.org/10.5989/jsgs.32.4_9
    JOURNAL FREE ACCESS
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  • The Study of the Non-Contact and Easy Shape Modeling
    Takahiro YONEMURA, Kenichi HIROSE, Sadahiko NAGAE
    1998 Volume 32 Issue 4 Pages 17-23
    Published: 1998
    Released on J-STAGE: August 25, 2010
    DOIhttps://doi.org/10.5989/jsgs.32.4_17
    JOURNAL FREE ACCESS
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    This paper presents on the study to develop an easy handling system for making design forms of ceramics wares on the CRT display of the personal computer by using image processing method through a man-kind man machine interface. A video cameras installed on the computer can analyze the meaning on what kind of the 3 D shape model is requested by the operator, and several overlaid pictures are represented in the scope.
    In this study, wire models for a ceramics are displayed according to the operator's simple gesture commands such as“push”, “pull”and“rotate”on the scope with the real time processing. The study aims the development of a man-kind system without any contact sensors to the human body and which understands the operator's simple commands.
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  • Ebisui's theorem and a (154, 203) configuration
    Hiroshi Okumura
    1998 Volume 32 Issue 4 Pages 25-28
    Published: 1998
    Released on J-STAGE: August 25, 2010
    DOIhttps://doi.org/10.5989/jsgs.32.4_25
    JOURNAL FREE ACCESS
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    A simple geometric proof of Ebisui's theorem, if two triangles A1A2A3 and B1B2B3 are perspective and C3 = A1B2∩A2B1, C1=A2B3∩A3B2, C2=A3B1∩A1B3 then A1A2 A3 and C1C2C3 are also perspective, is given, which is using Desargues's theorem and its converse. With the theorem and an additional theorem, a (154, 203) configuration can be constructed, which is transitive both on points and lines.
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  • Distortion of Coordinate System by Gauss' Distribution Surface and Creation of Geometric Figures
    Naoki ODAKA
    1998 Volume 32 Issue 4 Pages 29-38
    Published: 1998
    Released on J-STAGE: August 25, 2010
    DOIhttps://doi.org/10.5989/jsgs.32.4_29
    JOURNAL FREE ACCESS
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    This paper described an algorithm to transform part of geometric figures created by a function continually using Gauss' distribution function, and its application. This algorithm will show new technique to get transformation mappings of geometric figure.
    The fundamental way of thinking in this algorithm is not to transform geometric figures on an orthogonal coordinate system, but to distort the system continualy and partially using Gauss' distribution function, and to produce geometric figures on the coordinate system distorted.
    In this paper, first, I show three fundamental conversion forms to get orthogonal coordinate system distorted continualy and partially using Gauss' distribution surface. The first method is to do coordinate transformation of a point on a plane, using a change rate of height of Gauss' distribution surface (partial differential coefficient) as revision value. The second conversion form is the projection of a point on Gauss' distribution surface form a fixed point, to convert a coordinate of a point on a plane. And the last method is to convert coordinate of a point rotationally, using height of Gauss' distribution surface as angle of rotaion on a plane.
    The next discussion shows how geometric figures on orthogonal coordinate system are transfigured on the distorted coordinate system, and characteristics and application of these methods.
    By this, we can have technique to create various and unique geometric figures, transforming part of geometric figure continually from a simple general idea of distortion of coordinate system.
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  • [title in Japanese]
    [in Japanese]
    1998 Volume 32 Issue 4 Pages 39-44
    Published: 1998
    Released on J-STAGE: August 25, 2010
    DOIhttps://doi.org/10.5989/jsgs.32.4_39
    JOURNAL FREE ACCESS
    Download PDF (466K)
  • [title in Japanese]
    [in Japanese]
    1998 Volume 32 Issue 4 Pages 45-60
    Published: 1998
    Released on J-STAGE: August 25, 2010
    DOIhttps://doi.org/10.5989/jsgs.32.4_45
    JOURNAL FREE ACCESS
    Download PDF (16195K)
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