IL104335A - Electronic high-fidelity screenless conversion system and method using a separable filter - Google Patents

Electronic high-fidelity screenless conversion system and method using a separable filter

Info

Publication number
IL104335A
IL104335A IL10433593A IL10433593A IL104335A IL 104335 A IL104335 A IL 104335A IL 10433593 A IL10433593 A IL 10433593A IL 10433593 A IL10433593 A IL 10433593A IL 104335 A IL104335 A IL 104335A
Authority
IL
Israel
Prior art keywords
values
value
input
converted
output
Prior art date
Application number
IL10433593A
Other languages
English (en)
Other versions
IL104335A0 (en
Original Assignee
Donnelley & Sons Co
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 Donnelley & Sons Co filed Critical Donnelley & Sons Co
Publication of IL104335A0 publication Critical patent/IL104335A0/xx
Publication of IL104335A publication Critical patent/IL104335A/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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)
  • Preparing Plates And Mask In Photomechanical Process (AREA)
  • Facsimile Image Signal Circuits (AREA)
IL10433593A 1992-07-29 1993-01-07 Electronic high-fidelity screenless conversion system and method using a separable filter IL104335A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/921,349 US5335089A (en) 1992-07-29 1992-07-29 Electronic high-fidelity screenless conversion system and method using a separable filter

Publications (2)

Publication Number Publication Date
IL104335A0 IL104335A0 (en) 1993-05-13
IL104335A true IL104335A (en) 1995-12-31

Family

ID=25445310

Family Applications (1)

Application Number Title Priority Date Filing Date
IL10433593A IL104335A (en) 1992-07-29 1993-01-07 Electronic high-fidelity screenless conversion system and method using a separable filter

Country Status (6)

Country Link
US (1) US5335089A (enExample)
EP (1) EP0581415A2 (enExample)
JP (1) JPH06105129A (enExample)
CA (1) CA2086624A1 (enExample)
FI (1) FI933373A7 (enExample)
IL (1) IL104335A (enExample)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0639023B1 (en) * 1993-08-13 1997-06-04 Agfa-Gevaert N.V. Method for producing frequency-modulated halftone images
US5748860A (en) * 1995-06-06 1998-05-05 R.R. Donnelley & Sons Company Image processing during page description language interpretation
US5764810A (en) * 1995-12-20 1998-06-09 R.R. Donnelley & Sons Company, Inc. Screenless conversion of continuous tone images with alterable dot spacing patterns
US5867599A (en) * 1996-01-11 1999-02-02 R.R. Donnelley & Sons Screenings of continuous tone images utilizing physical interactions of adjacent pixels
US6222641B1 (en) 1998-07-01 2001-04-24 Electronics For Imaging, Inc. Method and apparatus for image descreening
US6496603B1 (en) * 1999-02-08 2002-12-17 Sharp Laboratories Of America, Incorporated Enhanced error diffusion by using directional guided line thresholding
US7199837B2 (en) * 2001-11-13 2007-04-03 Ati Technologies, Inc. System for improved ratiometric expansion and method thereof
EP1401190B1 (en) * 2002-09-17 2013-05-29 Agfa Graphics N.V. Sub dot phase modulation for computer to plate inkjet system
US7280259B2 (en) * 2003-01-31 2007-10-09 Eastman Kodak Company Method for printing a color proof using a spatial filter
US6915225B2 (en) * 2003-05-15 2005-07-05 Northrop Grumman Corporation Method, apparatus and system for digital data resampling utilizing fourier series based interpolation
US6977758B2 (en) * 2003-09-26 2005-12-20 Xerox Corporation Halftone dot encoding
EP1779649A2 (en) * 2004-07-30 2007-05-02 Pacific Title & Arts Studio, Inc. Method for conversion and reproduction of film images through a digital process
US7777812B2 (en) * 2005-11-18 2010-08-17 Sharp Laboratories Of America, Inc. Methods and systems for picture resampling
US8576446B2 (en) * 2009-08-21 2013-11-05 Konica Minolta Laboratory U.S.A., Inc. Deblurring and supervised adaptive thresholding for print-and-scan document image evaluation

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2931098C2 (de) * 1979-07-31 1983-01-05 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Verfahren zur Druckformherstellung
US4350996A (en) * 1980-04-14 1982-09-21 Scitex Corporation Ltd. Screened image reproduction
US4449150A (en) * 1981-01-19 1984-05-15 Ricoh Company, Ltd. Method of processing medium tone picture
US4477833A (en) * 1981-08-12 1984-10-16 R. R. Donnelley & Sons Company Method of color conversion with improved interpolation
US4481532A (en) * 1982-06-28 1984-11-06 R. R. Donnelley & Sons Company Method of determining and storing color printing information
ATE27522T1 (de) * 1983-07-29 1987-06-15 Hell Rudolf Dr Ing Gmbh Verfahren und einrichtung zum minimieren von fehlern bei der digitalen verarbeitung von elektrischen signalen.
US4777620A (en) * 1985-02-20 1988-10-11 Elscint Ltd. Data compression system
US4668995A (en) * 1985-04-12 1987-05-26 International Business Machines Corporation System for reproducing mixed images
NL8501844A (nl) * 1985-06-27 1987-01-16 Oce Nederland B V Patents And Werkwijze voor het vergroten/verkleinen van een ditherbeeld.
DE3634939A1 (de) * 1986-10-14 1988-04-28 Du Pont Deutschland Verfahren zum aufzeichnen von quasihalbtonbildern
US4955065A (en) * 1987-03-17 1990-09-04 Digital Equipment Corporation System for producing dithered images from continuous-tone image data
GB8718100D0 (en) * 1987-07-30 1987-09-03 Crosfield Electronics Ltd Image processing
US4924322A (en) * 1988-03-18 1990-05-08 Matsushita Electric Industrial Co., Ltd. Bi-level image display signal processing apparatus
US5107346A (en) * 1988-10-14 1992-04-21 Bowers Imaging Technologies, Inc. Process for providing digital halftone images with random error diffusion
US4920501A (en) * 1988-10-19 1990-04-24 Eastman Kodak Company Digital halftoning with minimum visual modulation patterns
US5051844A (en) * 1989-01-30 1991-09-24 Eastman Kodak Company Digital halftoning with error diffusion
JPH0380767A (ja) * 1989-08-24 1991-04-05 Ricoh Co Ltd 画像の階調記録装置
US4987496A (en) * 1989-09-18 1991-01-22 Eastman Kodak Company System for scanning halftoned images

Also Published As

Publication number Publication date
FI933373L (fi) 1994-01-30
EP0581415A2 (en) 1994-02-02
IL104335A0 (en) 1993-05-13
CA2086624A1 (en) 1994-01-30
JPH06105129A (ja) 1994-04-15
FI933373A7 (fi) 1994-01-30
EP0581415A3 (enExample) 1994-02-23
US5335089A (en) 1994-08-02
FI933373A0 (fi) 1993-07-28

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