JPS5666970A - Binary device of variable density type picture - Google Patents

Binary device of variable density type picture

Info

Publication number
JPS5666970A
JPS5666970A JP14280979A JP14280979A JPS5666970A JP S5666970 A JPS5666970 A JP S5666970A JP 14280979 A JP14280979 A JP 14280979A JP 14280979 A JP14280979 A JP 14280979A JP S5666970 A JPS5666970 A JP S5666970A
Authority
JP
Japan
Prior art keywords
picture
binary
objective
variable density
picture element
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
JP14280979A
Other languages
Japanese (ja)
Other versions
JPS6226632B2 (en
Inventor
Yoshiaki Kurosawa
Sadaichi Watanabe
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP14280979A priority Critical patent/JPS5666970A/en
Publication of JPS5666970A publication Critical patent/JPS5666970A/en
Publication of JPS6226632B2 publication Critical patent/JPS6226632B2/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

Abstract

PURPOSE:Not only to make a binary picture smooth but also to elevate the resolution, by using not only an objective picture element but also peripheral picture elements, in case of making the objective picture element binary, as to the binary device of a variable density type picture. CONSTITUTION:In case of making an objective picture element (e) binary, X=(a-c)+(b-h)+(c-i), Y=(a-g)+(b-b)+(c-i) are calculated by the alternation among calculating circuits 331 and 332 by using the peripheral picture elements a-d and f-i, and the address data is generated from said e, x, y by the address generation part 333. And the half tone dot matrix is generated by the dot matrix generation part 304 consisting of a dot pattern memory, by use of said address. Accordingly, comparing with generation of the dot matrix from the objective picture element only as before, a border line does not appear on the picture caused by mismatching on the border line between the dot matrices, and a picture which is smooth, and high in resolution can be obtained.
JP14280979A 1979-11-06 1979-11-06 Binary device of variable density type picture Granted JPS5666970A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14280979A JPS5666970A (en) 1979-11-06 1979-11-06 Binary device of variable density type picture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14280979A JPS5666970A (en) 1979-11-06 1979-11-06 Binary device of variable density type picture

Publications (2)

Publication Number Publication Date
JPS5666970A true JPS5666970A (en) 1981-06-05
JPS6226632B2 JPS6226632B2 (en) 1987-06-10

Family

ID=15324131

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14280979A Granted JPS5666970A (en) 1979-11-06 1979-11-06 Binary device of variable density type picture

Country Status (1)

Country Link
JP (1) JPS5666970A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5844861A (en) * 1981-09-11 1983-03-15 Nippon Telegr & Teleph Corp <Ntt> Processing system for intermediate tone signal
JPS59141873A (en) * 1983-02-03 1984-08-14 Nec Corp Converting circuit for adaptive pseudo half tone

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5040015A (en) * 1973-07-16 1975-04-12
JPS5299720A (en) * 1976-02-18 1977-08-22 Toshiba Corp Method of converting analogous image signal to binary value
JPS54144141A (en) * 1978-05-01 1979-11-10 Ricoh Co Ltd Display method for intermediate tone

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5040015A (en) * 1973-07-16 1975-04-12
JPS5299720A (en) * 1976-02-18 1977-08-22 Toshiba Corp Method of converting analogous image signal to binary value
JPS54144141A (en) * 1978-05-01 1979-11-10 Ricoh Co Ltd Display method for intermediate tone

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5844861A (en) * 1981-09-11 1983-03-15 Nippon Telegr & Teleph Corp <Ntt> Processing system for intermediate tone signal
JPS6336713B2 (en) * 1981-09-11 1988-07-21 Nippon Telegraph & Telephone
JPS59141873A (en) * 1983-02-03 1984-08-14 Nec Corp Converting circuit for adaptive pseudo half tone
JPH0526389B2 (en) * 1983-02-03 1993-04-15 Nippon Electric Co

Also Published As

Publication number Publication date
JPS6226632B2 (en) 1987-06-10

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