SE9504016L - Halftoning - Google Patents

Halftoning

Info

Publication number
SE9504016L
SE9504016L SE9504016A SE9504016A SE9504016L SE 9504016 L SE9504016 L SE 9504016L SE 9504016 A SE9504016 A SE 9504016A SE 9504016 A SE9504016 A SE 9504016A SE 9504016 L SE9504016 L SE 9504016L
Authority
SE
Sweden
Prior art keywords
screens
picture
parts
detailed structure
areas
Prior art date
Application number
SE9504016A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE9504016D0 (en
Inventor
Bjoern Kruse
Original Assignee
Forskarpatent I Linkoeping Ab
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 Forskarpatent I Linkoeping Ab filed Critical Forskarpatent I Linkoeping Ab
Priority to SE9504016A priority Critical patent/SE9504016L/en
Publication of SE9504016D0 publication Critical patent/SE9504016D0/en
Priority to PCT/SE1996/001451 priority patent/WO1997018666A1/en
Priority to AU76594/96A priority patent/AU7659496A/en
Publication of SE9504016L publication Critical patent/SE9504016L/en

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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Printing Methods (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

Electronic, digital screening of pictures, in particular for printing, where different types of screens are mixed for one and the same picture. In picture areas with a detailed structure a fine screen is used while for larger areas with a less detailed structure in grey or colour scales a more coarse screen is used. Coarser screens may further be used for the parts of the picture that are to be very light (for instance skin tones and shiny parts). By allowing the screens to be integer number multiples of each other automatically soft transitions are obtained and some picture points will be parts in both screens.
SE9504016A 1995-11-13 1995-11-13 Halftoning SE9504016L (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9504016A SE9504016L (en) 1995-11-13 1995-11-13 Halftoning
PCT/SE1996/001451 WO1997018666A1 (en) 1995-11-13 1996-11-12 Screening method
AU76594/96A AU7659496A (en) 1995-11-13 1996-11-12 Screening method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9504016A SE9504016L (en) 1995-11-13 1995-11-13 Halftoning

Publications (2)

Publication Number Publication Date
SE9504016D0 SE9504016D0 (en) 1995-11-13
SE9504016L true SE9504016L (en) 1997-05-14

Family

ID=20400185

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9504016A SE9504016L (en) 1995-11-13 1995-11-13 Halftoning

Country Status (3)

Country Link
AU (1) AU7659496A (en)
SE (1) SE9504016L (en)
WO (1) WO1997018666A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5701366A (en) * 1996-09-04 1997-12-23 Canon Information Systems, Inc. Halftoning with gradient-based selection of dither matrices
US6178011B1 (en) * 1998-03-24 2001-01-23 Hewlett-Packard Company Adaptive image resolution enhancement technology
JP5055418B2 (en) 2010-12-10 2012-10-24 キヤノン株式会社 Image processing apparatus and image processing method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5055942A (en) * 1990-02-06 1991-10-08 Levien Raphael L Photographic image reproduction device using digital halftoning to screen images allowing adjustable coarseness
JP3222183B2 (en) * 1992-02-19 2001-10-22 株式会社リコー Image processing device

Also Published As

Publication number Publication date
WO1997018666A1 (en) 1997-05-22
AU7659496A (en) 1997-06-05
SE9504016D0 (en) 1995-11-13

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