Journal of Graphic Science of Japan

A method of construction perspective drawing by projective mapping- (3)

Naoki Odaka

1986 Volume 20 Issue 2 Pages 1-6
Published: 1986
Released on J-STAGE: August 25, 2010

DOIhttps://doi.org/10.5989/jsgs.20.2_1

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First, we properly arrange a given pair of orthogonal projections or in general parallel projections in space E³. Secondly, we take a picture of these figures. Finally, we magnify or reduce the photographs to make some copies. Properly arranging these copies on a plane and projecting them from two points on the plane, we can construct perspective drawing. This paper presents the geometrical principle of this new method of obtaining perspective drawing, the arrangement of parallel projections in E³, the notice on photographing, the method of drawing, the characteristic of this method and examples.

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Pattern Recognition by Optical Data Processing (3)

—Automatic Measuring System by Image Understanding—

Sadahiko NAGAE

1986 Volume 20 Issue 2 Pages 7-13
Published: 1986
Released on J-STAGE: August 25, 2010

DOIhttps://doi.org/10.5989/jsgs.20.2_7

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A new automatic measuring system is developed by using an optical data processor and a micro-computer for 3-Dimensional objects. Living human bodies are applied to the measuring models in order to make men's suits easier and earlier than that by the ordinal methods. The measuring precision is about 0.4% for human bodies and this is found to be enough for the apparel making.

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Color Gradation Techniques for Rendering

Kunio KONDO, Fumihiko KIMURA, Taro TAJIMA

1986 Volume 20 Issue 2 Pages 15-20
Published: 1986
Released on J-STAGE: August 25, 2010

DOIhttps://doi.org/10.5989/jsgs.20.2_15

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In this paper, described are color gradation techniques for rendering easily pictures and illustrations. We propose 1) color distribution curves, 2) a basic gradation technique by the interpolation method, 3) three kinds of gradation techniques based on the basic gradation technique i.e. linear, expansive and rotatable gradations, 4) a mixed gradation calculation method. These techniques are able to display gradations quickly on a graphic display, and are very useful for drawing complex gradations. A designer can draw pictures of his mental images easily using the CARP rendering system which includes these gradation techniques.

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[title in Japanese]

[in Japanese], [in Japanese], [in Japanese]

1986 Volume 20 Issue 2 Pages 21-27
Published: 1986
Released on J-STAGE: August 25, 2010

DOIhttps://doi.org/10.5989/jsgs.20.2_21

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[title in Japanese]

[in Japanese], [in Japanese]

1986 Volume 20 Issue 2 Pages 29-32
Published: 1986
Released on J-STAGE: August 25, 2010

DOIhttps://doi.org/10.5989/jsgs.20.2_29

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[title in Japanese]

[in Japanese]

1986 Volume 20 Issue 2 Pages 33-38
Published: 1986
Released on J-STAGE: August 25, 2010

DOIhttps://doi.org/10.5989/jsgs.20.2_33

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[title in Japanese]

[in Japanese]

1986 Volume 20 Issue 2 Pages 39-42
Published: 1986
Released on J-STAGE: August 25, 2010

DOIhttps://doi.org/10.5989/jsgs.20.2_39

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[title in Japanese]

1986 Volume 20 Issue 2 Pages 43-51
Published: 1986
Released on J-STAGE: December 09, 2010

DOIhttps://doi.org/10.5989/jsgs.20.2_43

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