SE9602696L - Fast screening process - Google Patents

Fast screening process

Info

Publication number
SE9602696L
SE9602696L SE9602696A SE9602696A SE9602696L SE 9602696 L SE9602696 L SE 9602696L SE 9602696 A SE9602696 A SE 9602696A SE 9602696 A SE9602696 A SE 9602696A SE 9602696 L SE9602696 L SE 9602696L
Authority
SE
Sweden
Prior art keywords
picture
halftone
halftoning
value
plate
Prior art date
Application number
SE9602696A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE9602696D0 (en
Inventor
Bjoern Kruse
Fredrik Nilsson
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 SE9602696A priority Critical patent/SE9602696L/en
Publication of SE9602696D0 publication Critical patent/SE9602696D0/en
Priority to PCT/SE1997/001180 priority patent/WO1998000966A1/en
Priority to AU35641/97A priority patent/AU3564197A/en
Publication of SE9602696L publication Critical patent/SE9602696L/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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Image Processing (AREA)

Abstract

Method for rapid FM-halftoning of pictures where all possible values in the picture correspond to a halftone plate, in which the halftone dots are maximally scattered. If the picture that is to be halftoned contains 256 different tone values, thus 256 halftone plates are pre-calculated, all constituted only by ones and zeros, that together build a halftoning volume. At the halftoning itself no comparison is then executed, but the choice to set a certain position in the picture or not is instead solved by a table-look-up method. The value of the input picture gives index in the table (that is which halftone plate that is to be used) and then the value from the corresponding position in the halftone plate is copied into the output picture.
SE9602696A 1996-07-01 1996-07-01 Fast screening process SE9602696L (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9602696A SE9602696L (en) 1996-07-01 1996-07-01 Fast screening process
PCT/SE1997/001180 WO1998000966A1 (en) 1996-07-01 1997-06-30 Method of displaying a sequence of images from a digital videocamera
AU35641/97A AU3564197A (en) 1996-07-01 1997-06-30 Method of displaying a sequence of images from a digital videocamera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9602696A SE9602696L (en) 1996-07-01 1996-07-01 Fast screening process

Publications (2)

Publication Number Publication Date
SE9602696D0 SE9602696D0 (en) 1996-07-01
SE9602696L true SE9602696L (en) 1998-01-02

Family

ID=20403321

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9602696A SE9602696L (en) 1996-07-01 1996-07-01 Fast screening process

Country Status (3)

Country Link
AU (1) AU3564197A (en)
SE (1) SE9602696L (en)
WO (1) WO1998000966A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5111310A (en) * 1990-12-04 1992-05-05 Research Technologies Corporation, Inc. Method and apparatus for halftone rendering of a gray scale image using a blue noise mask
US5463720A (en) * 1992-09-28 1995-10-31 Granger; Edward M. Blue noise based technique for use in a halftone tile oriented screener for masking screener induced image artifacts
EP0639023B1 (en) * 1993-08-13 1997-06-04 Agfa-Gevaert N.V. Method for producing frequency-modulated halftone images
EP0642258B1 (en) * 1993-09-02 1997-11-12 Agfa-Gevaert N.V. Method for generating a frequency modulated halftone image
DE69417832T2 (en) * 1993-09-28 1999-08-12 Hewlett Packard Co Digital halftone raster reproduction of a gray tone image with frequency-dependent diagonal correlation
JP2958245B2 (en) * 1994-09-06 1999-10-06 大日本スクリーン製造株式会社 How to create a print image

Also Published As

Publication number Publication date
WO1998000966A1 (en) 1998-01-08
AU3564197A (en) 1998-01-21
SE9602696D0 (en) 1996-07-01

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