DE69406929T2 - Mehrstufige halbtonrasterung hoher qualität für farbbilder mit beschränktem speicherbedarf - Google Patents

Mehrstufige halbtonrasterung hoher qualität für farbbilder mit beschränktem speicherbedarf

Info

Publication number
DE69406929T2
DE69406929T2 DE69406929T DE69406929T DE69406929T2 DE 69406929 T2 DE69406929 T2 DE 69406929T2 DE 69406929 T DE69406929 T DE 69406929T DE 69406929 T DE69406929 T DE 69406929T DE 69406929 T2 DE69406929 T2 DE 69406929T2
Authority
DE
Germany
Prior art keywords
high quality
memory requirements
colored images
restricted memory
halftone screening
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.)
Revoked
Application number
DE69406929T
Other languages
English (en)
Other versions
DE69406929D1 (de
Inventor
Marc Herregods
Roger Baeten
Geert Noppen
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.)
Agfa Gevaert NV
Original Assignee
Agfa Gevaert NV
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
Priority claimed from BE9300713A external-priority patent/BE1007264A4/nl
Application filed by Agfa Gevaert NV filed Critical Agfa Gevaert NV
Application granted granted Critical
Publication of DE69406929D1 publication Critical patent/DE69406929D1/de
Publication of DE69406929T2 publication Critical patent/DE69406929T2/de
Anticipated expiration legal-status Critical
Revoked 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
    • H04N1/46—Colour picture communication systems
    • H04N1/52—Circuits or arrangements for halftone screening
    • 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
    • H04N1/40087—Multi-toning, i.e. converting a continuous-tone signal for reproduction with more than two discrete brightnesses or optical densities, e.g. dots of grey and black inks on white paper
    • 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
    • H04N1/4057—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 the pattern being a mixture of differently sized sub-patterns, e.g. spots having only a few different diameters
    • 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
    • H04N1/4058—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 with details for producing a halftone screen at an oblique angle
    • 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
    • H04N1/46—Colour picture communication systems
    • H04N1/50—Picture reproducers
    • H04N1/506—Reproducing the colour component signals picture-sequentially, e.g. with reproducing heads spaced apart from one another in the subscanning direction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Color, Gradation (AREA)
DE69406929T 1993-07-12 1994-07-07 Mehrstufige halbtonrasterung hoher qualität für farbbilder mit beschränktem speicherbedarf Revoked DE69406929T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BE9300713A BE1007264A4 (nl) 1993-07-12 1993-07-12 Rastermethode voor een schrijfsysteem met beperkte densiteitsresolutie.
EP93202522 1993-08-27
PCT/EP1994/002291 WO1995002938A1 (en) 1993-07-12 1994-07-07 High quality multilevel halftoning for colour images with reduced memory requirements

Publications (2)

Publication Number Publication Date
DE69406929D1 DE69406929D1 (de) 1998-01-02
DE69406929T2 true DE69406929T2 (de) 1998-06-18

Family

ID=25662748

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69406929T Revoked DE69406929T2 (de) 1993-07-12 1994-07-07 Mehrstufige halbtonrasterung hoher qualität für farbbilder mit beschränktem speicherbedarf

Country Status (4)

Country Link
US (1) US5828815A (de)
JP (1) JPH08512444A (de)
DE (1) DE69406929T2 (de)
WO (1) WO1995002938A1 (de)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5633729A (en) * 1994-12-22 1997-05-27 Eastman Kodak Company Processes for minimizing the quantization error in multi-level halftone transfer functions
JP3156605B2 (ja) * 1996-11-19 2001-04-16 セイコーエプソン株式会社 トナー転写式の印刷装置のためのパルス幅データの生成装置及び方法
US6052203A (en) * 1996-11-19 2000-04-18 Seiko Epson Corporation Printing system, printer, printer driver and program storage medium
US6252676B1 (en) * 1997-06-04 2001-06-26 Agfa Corporation System and method for proofing
JPH11168627A (ja) * 1997-08-27 1999-06-22 Fuji Photo Film Co Ltd 画像形成方法
US6049330A (en) * 1997-08-28 2000-04-11 Oak Technology, Inc. Method and apparatus for optimizing storage of compressed images in memory
JPH11198452A (ja) * 1998-01-12 1999-07-27 Fuji Photo Film Co Ltd 画像補正方法
US6266154B1 (en) 1998-05-21 2001-07-24 Oak Technology, Inc. Grayscale enhancement system and method
EP1059803B1 (de) * 1999-06-07 2007-07-18 Canon Kabushiki Kaisha Bildaufzeichnungsgerät und Verfahren
US6980326B2 (en) * 1999-12-15 2005-12-27 Canon Kabushiki Kaisha Image processing method and apparatus for color correction of an image
US6982800B1 (en) 2000-07-05 2006-01-03 Lexmark International, Inc. Apparatus and method for data management within a photoprinter
US7199837B2 (en) * 2001-11-13 2007-04-03 Ati Technologies, Inc. System for improved ratiometric expansion and method thereof
JP2003320715A (ja) * 2002-04-30 2003-11-11 Canon Inc 情報処理装置、情報処理システム、情報出力制御方法、記憶媒体、及びプログラム
US20070177172A1 (en) * 2005-10-14 2007-08-02 Cadlink Technology Corp. Opacity control of unpainted pixels
EP1978726A1 (de) * 2007-04-04 2008-10-08 CADlink Technology Corporation Rasterung mit variablen Punkten
US20100027074A1 (en) * 2008-07-31 2010-02-04 Sharp Laboratories Of America, Inc. Partition halftone for multi-tone level output device
CN103139440B (zh) * 2011-11-30 2015-06-17 北大方正集团有限公司 多位深半色调调幅网点生成方法及装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1797412B2 (de) * 1968-09-26 1972-05-04 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Verfahren zum aufzeichnen der durch abtasten von zu reproduzierenden halbtonbildvorlagen gewonnenen, quantisierten und ggf. digitalisierten bildsignale
JPS57160264A (en) * 1981-03-30 1982-10-02 Canon Inc Recorder of half tone picture
JPS59205874A (ja) * 1983-05-10 1984-11-21 Canon Inc 画像デ−タ圧縮装置
GB8813487D0 (en) * 1988-06-08 1988-07-13 Crosfield Electronics Ltd Improvements relating to image processing
US5146554A (en) * 1989-09-29 1992-09-08 Eastman Kodak Company Page memory control in a raster image processor employed for digital halftoning
US5287209A (en) * 1990-10-09 1994-02-15 Matsushita Electric Industrial Co., Ltd. Image forming device for enhancing tone reproduction by changing dot size
US5404156A (en) * 1992-07-25 1995-04-04 Fuji Xerox Co., Ltd. Method and apparatus for forming a full-color image
NL9201570A (nl) * 1992-09-10 1994-04-05 Oce Nederland Bv Werkwijze voor het bij toevoer van, door een eerste en een tweede signaalbron gegenereerde digitale beeldinformatiesignalen van een eerste soort en onder gebruikmaking van de in genoemde signalen aanwezige informatieinhoud betreffende de dichtheidswaarde, per beeldpunt genereren van beeldinformatiesignalen van een tweede soort ter verkrijging van beeldweergeefsignalen, alsmede een reproductiesysteem voor het uitvoeren van een dergelijke werkwijze.
US5426519A (en) * 1994-08-25 1995-06-20 Xerox Corporation Method and apparatus for implementing accurate angle screens

Also Published As

Publication number Publication date
JPH08512444A (ja) 1996-12-24
WO1995002938A1 (en) 1995-01-26
DE69406929D1 (de) 1998-01-02
US5828815A (en) 1998-10-27

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8320 Willingness to grant licences declared (paragraph 23)
8331 Complete revocation