DE3067060D1 - Apparatus and method for generating a dispersed dot half tone picture from a continuous tone picture - Google Patents

Apparatus and method for generating a dispersed dot half tone picture from a continuous tone picture

Info

Publication number
DE3067060D1
DE3067060D1 DE8080304596T DE3067060T DE3067060D1 DE 3067060 D1 DE3067060 D1 DE 3067060D1 DE 8080304596 T DE8080304596 T DE 8080304596T DE 3067060 T DE3067060 T DE 3067060T DE 3067060 D1 DE3067060 D1 DE 3067060D1
Authority
DE
Germany
Prior art keywords
tone picture
generating
dispersed dot
dot half
picture
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
Application number
DE8080304596T
Other languages
English (en)
Inventor
Stephen Temple
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.)
Cambridge Consultants Ltd
Original Assignee
Cambridge Consultants 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 Cambridge Consultants Ltd filed Critical Cambridge Consultants Ltd
Application granted granted Critical
Publication of DE3067060D1 publication Critical patent/DE3067060D1/de
Expired 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T3/00—Geometric image transformations in the plane of the image
    • G06T3/40—Scaling of whole images or parts thereof, e.g. expanding or contracting
    • G06T3/403—Edge-driven scaling; Edge-based scaling

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
DE8080304596T 1979-12-20 1980-12-18 Apparatus and method for generating a dispersed dot half tone picture from a continuous tone picture Expired DE3067060D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7943894 1979-12-20

Publications (1)

Publication Number Publication Date
DE3067060D1 true DE3067060D1 (en) 1984-04-19

Family

ID=10509968

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8080304596T Expired DE3067060D1 (en) 1979-12-20 1980-12-18 Apparatus and method for generating a dispersed dot half tone picture from a continuous tone picture

Country Status (3)

Country Link
US (1) US4339774A (de)
EP (1) EP0031247B1 (de)
DE (1) DE3067060D1 (de)

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Also Published As

Publication number Publication date
US4339774A (en) 1982-07-13
EP0031247A1 (de) 1981-07-01
EP0031247B1 (de) 1984-03-14

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