JPS5453833A - Arc description method - Google Patents

Arc description method

Info

Publication number
JPS5453833A
JPS5453833A JP11990577A JP11990577A JPS5453833A JP S5453833 A JPS5453833 A JP S5453833A JP 11990577 A JP11990577 A JP 11990577A JP 11990577 A JP11990577 A JP 11990577A JP S5453833 A JPS5453833 A JP S5453833A
Authority
JP
Japan
Prior art keywords
point
distance
arc
grey
toothed
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
JP11990577A
Other languages
Japanese (ja)
Inventor
Naohiko Kamae
Mamoru Okada
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.)
NTT Inc
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP11990577A priority Critical patent/JPS5453833A/en
Publication of JPS5453833A publication Critical patent/JPS5453833A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To describe an arc, which is little saw-toothed, by difining a density or luminance level of picture elements according to the distance from a point corresponding to a recorded or displayed picture element to the point where a line parallel to the Z axis and the rotary paraboloid intersect.
CONSTITUTION: A density or luminance level of picture elements is so defined that a shorter-distance point may have a higher level according to distance |f(xi, yi)| from point (xi, yi) corresponding to a recorded or displayed picture element to the point where a line parallel to the Z axis and rotary paraboloid Z=(x-a)2+ (y-b)2-r2 intersect. That is, black, grey near to black, grey near to white and white are denoted as "1", "2/3", "1/3" and "0" respectively in respect to the absolute value of point (xi, yi), so that an arc which is little saw-toothed can be described
COPYRIGHT: (C)1979,JPO&Japio
JP11990577A 1977-10-07 1977-10-07 Arc description method Pending JPS5453833A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11990577A JPS5453833A (en) 1977-10-07 1977-10-07 Arc description method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11990577A JPS5453833A (en) 1977-10-07 1977-10-07 Arc description method

Publications (1)

Publication Number Publication Date
JPS5453833A true JPS5453833A (en) 1979-04-27

Family

ID=14773101

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11990577A Pending JPS5453833A (en) 1977-10-07 1977-10-07 Arc description method

Country Status (1)

Country Link
JP (1) JPS5453833A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5741688A (en) * 1980-08-26 1982-03-08 Mitsubishi Electric Corp Circular-arc generating method
JPS6098485A (en) * 1983-11-04 1985-06-01 カシオ計算機株式会社 display device
JPS62123576A (en) * 1986-07-11 1987-06-04 Nec Corp Circle drawing method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4852335A (en) * 1971-10-27 1973-07-23

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4852335A (en) * 1971-10-27 1973-07-23

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5741688A (en) * 1980-08-26 1982-03-08 Mitsubishi Electric Corp Circular-arc generating method
JPS6098485A (en) * 1983-11-04 1985-06-01 カシオ計算機株式会社 display device
JPS62123576A (en) * 1986-07-11 1987-06-04 Nec Corp Circle drawing method

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