JPS6461882A - Method and device for converting graphic data - Google Patents

Method and device for converting graphic data

Info

Publication number
JPS6461882A
JPS6461882A JP21937787A JP21937787A JPS6461882A JP S6461882 A JPS6461882 A JP S6461882A JP 21937787 A JP21937787 A JP 21937787A JP 21937787 A JP21937787 A JP 21937787A JP S6461882 A JPS6461882 A JP S6461882A
Authority
JP
Japan
Prior art keywords
data
generated
graphic
polygon
circle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP21937787A
Other languages
Japanese (ja)
Inventor
Taisan Goto
Kuniyoshi Wakasaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shibaura Machine Co Ltd
Original Assignee
Toshiba Machine Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Machine Co Ltd filed Critical Toshiba Machine Co Ltd
Priority to JP21937787A priority Critical patent/JPS6461882A/en
Publication of JPS6461882A publication Critical patent/JPS6461882A/en
Pending legal-status Critical Current

Links

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  • Image Generation (AREA)

Abstract

PURPOSE:To attain the aggregation of rectangular graphic data with small numbers and to improve conversion efficiency, by specifying the allowable value of an error generated with approximating a circular arc with a straight line when the data of circular arc graphic, such as a circle and an annulus ring, are converted to the data of rectangular graphic. CONSTITUTION:When the circular graphic arc data with the coordinate of a center O (x0, y0) and a radius (r), are converted to the rectangular graphic data, first, the circumference of a circle A is equally divided into (n) pieces, division points A1-An are successively linked, and the circle A is made into a polygon B. Next, the facing positions of the division points are successively linked with straight lines D1-B3, which are paralleled to, upper and lower triangles C1 and C4 are generated in the polygon B, and trapezoids C2 and C3 are generated positioning between them. Thereafter, an error E generated between a line to connect, for example, the division points A1 and A2 of the polygon B and the circular arc facing to the line is calculated by the expression E=r{1-cospi/n}, and out of the areas previously divided by the parallel lines in order to minimize them, the area and number of the trapezoids C2 and C3 sandwiched by the triangles C1 and C4 are increased.
JP21937787A 1987-09-02 1987-09-02 Method and device for converting graphic data Pending JPS6461882A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21937787A JPS6461882A (en) 1987-09-02 1987-09-02 Method and device for converting graphic data

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21937787A JPS6461882A (en) 1987-09-02 1987-09-02 Method and device for converting graphic data

Publications (1)

Publication Number Publication Date
JPS6461882A true JPS6461882A (en) 1989-03-08

Family

ID=16734465

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21937787A Pending JPS6461882A (en) 1987-09-02 1987-09-02 Method and device for converting graphic data

Country Status (1)

Country Link
JP (1) JPS6461882A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013231906A (en) * 2012-05-01 2013-11-14 Japan Display Inc Liquid crystal display device and method for manufacturing the same
JP2017041118A (en) * 2015-08-20 2017-02-23 大日本印刷株式会社 Pattern editing program, shot data creation program, pattern editing device, shot data creation device and pattern editing method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5335332A (en) * 1976-09-13 1978-04-01 Nippon Telegr & Teleph Corp <Ntt> Approximate circular generation system
JPS6298470A (en) * 1985-10-25 1987-05-07 Hitachi Ltd Generating method for circle
JPS63286983A (en) * 1987-05-08 1988-11-24 ゼロックス　コーポレーション Graphic analysis for round stroke end

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5335332A (en) * 1976-09-13 1978-04-01 Nippon Telegr & Teleph Corp <Ntt> Approximate circular generation system
JPS6298470A (en) * 1985-10-25 1987-05-07 Hitachi Ltd Generating method for circle
JPS63286983A (en) * 1987-05-08 1988-11-24 ゼロックス　コーポレーション Graphic analysis for round stroke end

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013231906A (en) * 2012-05-01 2013-11-14 Japan Display Inc Liquid crystal display device and method for manufacturing the same
JP2017041118A (en) * 2015-08-20 2017-02-23 大日本印刷株式会社 Pattern editing program, shot data creation program, pattern editing device, shot data creation device and pattern editing method

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