CA2086624A1 - 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
CA2086624A1
CA2086624A1 CA002086624A CA2086624A CA2086624A1 CA 2086624 A1 CA2086624 A1 CA 2086624A1 CA 002086624 A CA002086624 A CA 002086624A CA 2086624 A CA2086624 A CA 2086624A CA 2086624 A1 CA2086624 A1 CA 2086624A1
Authority
CA
Canada
Prior art keywords
values
value
input
converted
output
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.)
Abandoned
Application number
CA002086624A
Other languages
English (en)
French (fr)
Inventor
Zhenhua Xie
Michael A. Rodriguez
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.)
RR Donnelley and Sons Co
Original Assignee
RR Donnelley and 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 RR Donnelley and Sons Co filed Critical RR Donnelley and Sons Co
Publication of CA2086624A1 publication Critical patent/CA2086624A1/en
Abandoned 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

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)
CA002086624A 1992-07-29 1993-01-04 Electronic high-fidelity screenless conversion system and method using a separable filter Abandoned CA2086624A1 (en)

Applications Claiming Priority (2)

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
US07/921,349 1992-07-29

Publications (1)

Publication Number Publication Date
CA2086624A1 true CA2086624A1 (en) 1994-01-30

Family

ID=25445310

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002086624A Abandoned CA2086624A1 (en) 1992-07-29 1993-01-04 Electronic high-fidelity screenless conversion system and method using a separable filter

Country Status (6)

Country Link
US (1) US5335089A (2)
EP (1) EP0581415A2 (2)
JP (1) JPH06105129A (2)
CA (1) CA2086624A1 (2)
FI (1) FI933373A7 (2)
IL (1) IL104335A (2)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69403581T2 (de) * 1993-08-13 1998-02-05 Agfa Gevaert Nv Verfahren zum Erzeugen frequenzmodulierter Halbtonbilder
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
CA2578358A1 (en) * 2004-07-30 2006-02-09 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
JPH06105129A (ja) 1994-04-15
US5335089A (en) 1994-08-02
FI933373L (fi) 1994-01-30
EP0581415A2 (en) 1994-02-02
FI933373A0 (fi) 1993-07-28
IL104335A0 (en) 1993-05-13
EP0581415A3 (2) 1994-02-23
FI933373A7 (fi) 1994-01-30
IL104335A (en) 1995-12-31

Similar Documents

Publication Publication Date Title
DE69033372T2 (de) Bildverarbeitungsvorrichtung
EP0838940B1 (en) Multiple spatial channel processing
EP0749232B1 (en) Dither matrix for halftone rendering of a gray scale image using a blue noise mask
EP1392048B1 (en) Halftone dot-growth technique based on morphological filtering
US5477305A (en) Method and apparatus for halftone rendering of a gray scale image using a blue noise mask
JP4386674B2 (ja) ドットエッジ検知スキームを用いた中間調網点の画素数変更技術
DE69123832T2 (de) Punktgrössesteuerverfahren bei digitaler Halbtonrasterung mit mehrzelliger Schwellenmatrix
US5200831A (en) Method and arrangement for locally switching gray dot types to reproduce an image with gray level printing
CA2086624A1 (en) Electronic high-fidelity screenless conversion system and method using a separable filter
US5515456A (en) Process for providing digital halftone image with random error diffusion, color correction and enlargement
JPS5977769A (ja) 像再生装置
US5313309A (en) Method and apparatus for printing halftones with a gray level printer with contour suppression and/or minimization of moire patterns
US4758886A (en) Optimal color half-tone patterns for raster-scan images
US6081349A (en) Image processing device, image processing system, and method for generating screens for image processing
US5331430A (en) Electronic high-fidelity screenless conversion system
US7280259B2 (en) Method for printing a color proof using a spatial filter
US5991513A (en) Method and apparatus for suppressing moire patterns
US5867599A (en) Screenings of continuous tone images utilizing physical interactions of adjacent pixels
EP2187616A1 (en) Image data processing for printing
JP2002044448A (ja) カラー画像記録装置、及び、カラー印刷の角度制御方法
US5764810A (en) Screenless conversion of continuous tone images with alterable dot spacing patterns
JP2006033063A (ja) 面積階調画像形成方法
CA2231816C (en) Method and apparatus for halftone rendering of a gray scale image using a blue noise mask
JPH03184467A (ja) 画像処理装置
JPH11205601A (ja) スクリーニング方法及び印刷物

Legal Events

Date Code Title Description
FZDE Discontinued