DE3674943D1 - Verfahren zur reproduktion digitaler bilder mit mehrfachtoenung mittels eines doppeltoenungsdruckers mit fester punktgroesse. - Google Patents

Verfahren zur reproduktion digitaler bilder mit mehrfachtoenung mittels eines doppeltoenungsdruckers mit fester punktgroesse.

Info

Publication number
DE3674943D1
DE3674943D1 DE8686102646T DE3674943T DE3674943D1 DE 3674943 D1 DE3674943 D1 DE 3674943D1 DE 8686102646 T DE8686102646 T DE 8686102646T DE 3674943 T DE3674943 T DE 3674943T DE 3674943 D1 DE3674943 D1 DE 3674943D1
Authority
DE
Germany
Prior art keywords
reproducting
double
digital images
dot size
multiple opening
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.)
Expired - Fee Related
Application number
DE8686102646T
Other languages
English (en)
Inventor
Gerald Goertzel
Gerhard Robert Thompson
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=24903880&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3674943(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Application granted granted Critical
Publication of DE3674943D1 publication Critical patent/DE3674943D1/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04N1/4051—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a dispersed dots halftone pattern, the dots having substantially the same size
    • H04N1/4052—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a dispersed dots halftone pattern, the dots having substantially the same size by error diffusion, i.e. transferring the binarising error to neighbouring dot decisions
    • 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
DE8686102646T 1985-04-12 1986-02-28 Verfahren zur reproduktion digitaler bilder mit mehrfachtoenung mittels eines doppeltoenungsdruckers mit fester punktgroesse. Expired - Fee Related DE3674943D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/722,898 US4654721A (en) 1985-04-12 1985-04-12 System for reproducing multi-level digital images on a bi-level printer of fixed dot size

Publications (1)

Publication Number Publication Date
DE3674943D1 true DE3674943D1 (de) 1990-11-22

Family

ID=24903880

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8686102646T Expired - Fee Related DE3674943D1 (de) 1985-04-12 1986-02-28 Verfahren zur reproduktion digitaler bilder mit mehrfachtoenung mittels eines doppeltoenungsdruckers mit fester punktgroesse.

Country Status (5)

Country Link
US (1) US4654721A (de)
EP (1) EP0201674B2 (de)
JP (1) JPS61237574A (de)
CA (1) CA1248878A (de)
DE (1) DE3674943D1 (de)

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Also Published As

Publication number Publication date
JPS61237574A (ja) 1986-10-22
EP0201674A2 (de) 1986-11-20
EP0201674B1 (de) 1990-10-17
EP0201674B2 (de) 1994-04-13
EP0201674A3 (en) 1987-09-16
JPH0472433B2 (de) 1992-11-18
CA1248878A (en) 1989-01-17
US4654721A (en) 1987-03-31

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8339 Ceased/non-payment of the annual fee