DE3676894D1 - Verfahren zum vergroessern/verkleinern von halbtonbildern. - Google Patents

Verfahren zum vergroessern/verkleinern von halbtonbildern.

Info

Publication number
DE3676894D1
DE3676894D1 DE8686201008T DE3676894T DE3676894D1 DE 3676894 D1 DE3676894 D1 DE 3676894D1 DE 8686201008 T DE8686201008 T DE 8686201008T DE 3676894 T DE3676894 T DE 3676894T DE 3676894 D1 DE3676894 D1 DE 3676894D1
Authority
DE
Germany
Prior art keywords
area
pixels
gray level
input area
input
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.)
Expired - Lifetime
Application number
DE8686201008T
Other languages
English (en)
Inventor
Dorsselaer Etienne Ludovic Van
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.)
Canon Production Printing Netherlands BV
Original Assignee
Oce Nederland BV
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 Oce Nederland BV filed Critical Oce Nederland BV
Application granted granted Critical
Publication of DE3676894D1 publication Critical patent/DE3676894D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04N1/40068—Modification of image resolution, i.e. determining the values of picture elements at new relative positions
    • 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
    • H04N1/40075—Descreening, i.e. converting a halftone signal into a corresponding continuous-tone signal; Rescreening, i.e. combined descreening and halftoning

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)
  • Editing Of Facsimile Originals (AREA)
  • Preparing Plates And Mask In Photomechanical Process (AREA)
  • Facsimile Image Signal Circuits (AREA)
DE8686201008T 1985-06-27 1986-06-11 Verfahren zum vergroessern/verkleinern von halbtonbildern. Expired - Lifetime DE3676894D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8501845A NL8501845A (nl) 1985-06-27 1985-06-27 Werkwijze voor het vergroten/verkleinen van ditherbeelden.

Publications (1)

Publication Number Publication Date
DE3676894D1 true DE3676894D1 (de) 1991-02-21

Family

ID=19846205

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8686201008T Expired - Lifetime DE3676894D1 (de) 1985-06-27 1986-06-11 Verfahren zum vergroessern/verkleinern von halbtonbildern.

Country Status (6)

Country Link
US (1) US4937677A (de)
EP (1) EP0208355B1 (de)
JP (1) JPH0693246B2 (de)
AT (1) ATE60178T1 (de)
DE (1) DE3676894D1 (de)
NL (1) NL8501845A (de)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0754547B2 (ja) * 1985-11-15 1995-06-07 コニカ株式会社 画像処理装置
JPH0650522B2 (ja) * 1988-09-22 1994-06-29 インターナショナル・ビジネス・マシーンズ・コーポレーション 表示システム
JPH02217897A (ja) * 1989-02-20 1990-08-30 Hitachi Ltd 画素密度変換方式
US5179640A (en) * 1990-02-01 1993-01-12 Oce Graphics Usa Inc. Generating repeating patterns from a pattern header
JPH03284054A (ja) * 1990-03-30 1991-12-13 Seiko Instr Inc 画素密度変換装置
US5339171A (en) * 1990-04-24 1994-08-16 Ricoh Company, Ltd. Image processing apparatus especially suitable for producing smooth-edged output multi-level tone data having fewer levels than input multi-level tone data
JP2788699B2 (ja) * 1992-12-16 1998-08-20 松下電器産業株式会社 画像データ処理装置
DE69433603D1 (de) * 1993-10-26 2004-04-15 Canon Kk Bildverarbeitungsverfahren und -gerät
GB2292649B (en) * 1994-08-24 1998-10-07 Seiko Epson Corp Multiple tonal range image processing system
US5703695A (en) * 1995-03-20 1997-12-30 Nguyen; Hugh P. Multi-dot dither matrix generation
US5638187A (en) * 1996-02-23 1997-06-10 Hewlett-Packard Company Image dithering method enabling conversion of a gray level pixel image into a binary pixel image
US7245786B2 (en) * 2002-05-10 2007-07-17 976076 Alberta Inc. Filtering artifact from fMRI data using the stockwell transform
US7424168B2 (en) * 2003-12-24 2008-09-09 Sharp Laboratories Of America, Inc. Enhancing the quality of decoded quantized images
US7424166B2 (en) * 2003-12-24 2008-09-09 Sharp Laboratories Of America, Inc. Enhancing the quality of decoded quantized images
KR100766081B1 (ko) * 2006-08-30 2007-10-12 삼성전자주식회사 영상신호처리장치 및 그의 영상신호처리방법
US10832613B2 (en) 2018-03-07 2020-11-10 At&T Intellectual Property I, L.P. Image format conversion using luminance-adaptive dithering

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4266249A (en) * 1978-09-19 1981-05-05 Bell Telephone Laboratories, Incorporated Digital encoder for facsimile transmission
US4259694A (en) * 1979-08-24 1981-03-31 Xerox Corporation Electronic rescreen technique for halftone pictures
JPS6049339A (ja) * 1983-08-30 1985-03-18 Dainippon Screen Mfg Co Ltd 複製画像の編集装置
US4758897A (en) * 1985-04-30 1988-07-19 Konishiroku Photo Industry Co., Ltd. Method and apparatus for estimating halftone image from binary image
US4803558A (en) * 1985-11-15 1989-02-07 Konishiroku Photo Industry Co., Ltd. Halftone image estimation methods for dither images
JP2794281B2 (ja) * 1986-07-10 1998-09-03 株式会社日立製作所 デイザ信号の符号復号処理装置
US4730221A (en) * 1986-10-16 1988-03-08 Xerox Corporation Screening techniques by identification of constant grey components
NL8602712A (nl) * 1986-10-29 1988-05-16 Oce Nederland Bv Werkwijze voor het reconstrueren van een dithermatrix.
US4800443A (en) * 1987-08-14 1989-01-24 Tektronix, Inc. Method and apparatus for carrying out a dithering operation

Also Published As

Publication number Publication date
EP0208355A1 (de) 1987-01-14
JPS6225388A (ja) 1987-02-03
EP0208355B1 (de) 1991-01-16
JPH0693246B2 (ja) 1994-11-16
ATE60178T1 (de) 1991-02-15
US4937677A (en) 1990-06-26
NL8501845A (nl) 1987-01-16

Similar Documents

Publication Publication Date Title
DE3676894D1 (de) Verfahren zum vergroessern/verkleinern von halbtonbildern.
JPS6342902B2 (de)
EP0781034B1 (de) Bildverarbeitungsgerät und -verfahren
JPH03185969A (ja) 入力画素のハーフトーン処理及び画像信号変換方法
EP0382581B1 (de) Bildverarbeitungsvorrichtung
JP2683085B2 (ja) 画像処理装置
DE69308632D1 (de) Verbessertes Verfahren zur frequenzmodulierten Halbtonrasterung
JP2683084B2 (ja) 画像処理装置
JP3461247B2 (ja) 画像処理装置及び画像処理方法
JP2810395B2 (ja) 画像処理装置
JP2570890B2 (ja) 画像処理装置
JPS5814673A (ja) 階調信号復元方式
JPS63214073A (ja) 画像処理方法
JP2848567B2 (ja) 画像処理装置
JP2504848B2 (ja) ディザ化方式
JP2702747B2 (ja) 画像信号処理装置
JPH0197650A (ja) 画像処理方法
JP3027489B2 (ja) 画像処理装置
JPS61198972A (ja) 画像信号処理装置
JPS63214074A (ja) 画像処理方法
JPS6298974A (ja) フアクシミリ装置
JPH01175367A (ja) 画像処理装置
JPS60236582A (ja) 画信号量子化方式
JPH0311879A (ja) 画素密度変換装置
JPH0818781A (ja) ２値化装置及びこれを用いた装置

Legal Events

Date Code Title Description
8328 Change in the person/name/address of the agent

Free format text: TER MEER, N., DIPL.-CHEM. DR.RER.NAT. MUELLER, F., DIPL.-ING., 8000 MUENCHEN STEINMEISTER, H., DIPL.-ING. WIEBUSCH, M., 4800 BIELEFELD URNER, P., DIPL.-PHYS. ING.(GRAD.), PAT.-ANWAELTE, 8000 MUENCHEN

8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee