JPS5473650A - Gradation recording method - Google Patents

Gradation recording method

Info

Publication number
JPS5473650A
JPS5473650A JP14074277A JP14074277A JPS5473650A JP S5473650 A JPS5473650 A JP S5473650A JP 14074277 A JP14074277 A JP 14074277A JP 14074277 A JP14074277 A JP 14074277A JP S5473650 A JPS5473650 A JP S5473650A
Authority
JP
Japan
Prior art keywords
printed
halftone
gradation
image
predetermined
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.)
Granted
Application number
JP14074277A
Other languages
Japanese (ja)
Other versions
JPS5619836B2 (en
Inventor
Hirokata Ito
Koichi Takagi
Eizo Tomita
Yasumoto Yaegashi
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.)
KEISATSUCHIYOU CHIYOUKAN
KEISATSUCHIYOU CHOKAN
Oki Electric Industry Co Ltd
Original Assignee
KEISATSUCHIYOU CHIYOUKAN
KEISATSUCHIYOU CHOKAN
Oki Electric Industry 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 KEISATSUCHIYOU CHIYOUKAN, KEISATSUCHIYOU CHOKAN, Oki Electric Industry Co Ltd filed Critical KEISATSUCHIYOU CHIYOUKAN
Priority to JP14074277A priority Critical patent/JPS5473650A/en
Publication of JPS5473650A publication Critical patent/JPS5473650A/en
Publication of JPS5619836B2 publication Critical patent/JPS5619836B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
    • H04N1/4055—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern

Abstract

PURPOSE:To increase gradation number without increasing dot number forming one image element and to express delicate gradation without lowering resolution, by properly combining a halftone level predetermined with black. CONSTITUTION:When the signals of an image having several steps of gradation, such as photographs are reproduced and recorded using heat-sensitive printing paper, halftone is developed by composing one image element with plural dots and controlling the time for flowing current to heating elements, and the same dot is printed by 2 memory accesses. For example, when gradations 3, 4, 5 are printed, the upper half of the image element is first printed by the first memory access in accordance with image information to develop the halftone of a predetermined level and again printed by the secnod memory access to color the predetermined dot to black, and the lower half of the element is likewise printed by the twice memory accesses.
JP14074277A 1977-11-25 1977-11-25 Gradation recording method Granted JPS5473650A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14074277A JPS5473650A (en) 1977-11-25 1977-11-25 Gradation recording method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14074277A JPS5473650A (en) 1977-11-25 1977-11-25 Gradation recording method

Publications (2)

Publication Number Publication Date
JPS5473650A true JPS5473650A (en) 1979-06-13
JPS5619836B2 JPS5619836B2 (en) 1981-05-09

Family

ID=15275651

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14074277A Granted JPS5473650A (en) 1977-11-25 1977-11-25 Gradation recording method

Country Status (1)

Country Link
JP (1) JPS5473650A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS572775A (en) * 1980-06-06 1982-01-08 Nippon Telegr & Teleph Corp <Ntt> Recording system for gradation image
JPS572773A (en) * 1980-06-06 1982-01-08 Nippon Telegr & Teleph Corp <Ntt> Recording system for gradation image
JPS572774A (en) * 1980-06-06 1982-01-08 Nippon Telegr & Teleph Corp <Ntt> Recording system for gradation image
JPS57193377A (en) * 1981-05-23 1982-11-27 Nippon Telegr & Teleph Corp <Ntt> Recording method for color halftone image
JPS59229971A (en) * 1983-06-10 1984-12-24 Mitsubishi Electric Corp Color thermal transfer recording method
JPS6030265A (en) * 1983-07-28 1985-02-15 Fuji Xerox Co Ltd Thermal half-tone recording method
JPS6288476A (en) * 1985-10-15 1987-04-22 Seiko Instr & Electronics Ltd Picture printer
JPS6447547A (en) * 1987-08-18 1989-02-22 Toshiba Corp Recording system of halftone
JP2006159794A (en) * 2004-12-09 2006-06-22 Polymatech Co Ltd Decorative molded body having gradation design and manufacturing method thereof

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS572775A (en) * 1980-06-06 1982-01-08 Nippon Telegr & Teleph Corp <Ntt> Recording system for gradation image
JPS572773A (en) * 1980-06-06 1982-01-08 Nippon Telegr & Teleph Corp <Ntt> Recording system for gradation image
JPS572774A (en) * 1980-06-06 1982-01-08 Nippon Telegr & Teleph Corp <Ntt> Recording system for gradation image
JPH0326141B2 (en) * 1980-06-06 1991-04-09 Nippon Telegraph & Telephone
JPH0326140B2 (en) * 1980-06-06 1991-04-09 Nippon Telegraph & Telephone
JPH0319070B2 (en) * 1981-05-23 1991-03-14 Nippon Telegraph & Telephone
JPS57193377A (en) * 1981-05-23 1982-11-27 Nippon Telegr & Teleph Corp <Ntt> Recording method for color halftone image
JPH027221B2 (en) * 1983-06-10 1990-02-16 Mitsubishi Electric Corp
JPS59229971A (en) * 1983-06-10 1984-12-24 Mitsubishi Electric Corp Color thermal transfer recording method
JPS6030265A (en) * 1983-07-28 1985-02-15 Fuji Xerox Co Ltd Thermal half-tone recording method
JPS6288476A (en) * 1985-10-15 1987-04-22 Seiko Instr & Electronics Ltd Picture printer
JPS6447547A (en) * 1987-08-18 1989-02-22 Toshiba Corp Recording system of halftone
JP2006159794A (en) * 2004-12-09 2006-06-22 Polymatech Co Ltd Decorative molded body having gradation design and manufacturing method thereof

Also Published As

Publication number Publication date
JPS5619836B2 (en) 1981-05-09

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