BE864353A - Procede de reproduction a resolution fine a partir d'un balayage a resolution grossiere - Google Patents

Procede de reproduction a resolution fine a partir d'un balayage a resolution grossiere

Info

Publication number
BE864353A
BE864353A BE185512A BE185512A BE864353A BE 864353 A BE864353 A BE 864353A BE 185512 A BE185512 A BE 185512A BE 185512 A BE185512 A BE 185512A BE 864353 A BE864353 A BE 864353A
Authority
BE
Belgium
Prior art keywords
resolution
reproduction process
scan
coarse
fine
Prior art date
Application number
BE185512A
Other languages
English (en)
Original Assignee
Ibm
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 Ibm filed Critical Ibm
Publication of BE864353A publication Critical patent/BE864353A/fr

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
    • H04N1/41—Bandwidth or redundancy reduction
    • H04N1/411—Bandwidth or redundancy reduction for the transmission or storage or reproduction of two-tone pictures, e.g. black and white pictures
    • 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
    • H04N1/405—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Of Band Width Or Redundancy In Fax (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
BE185512A 1977-03-31 1978-02-27 Procede de reproduction a resolution fine a partir d'un balayage a resolution grossiere BE864353A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/783,374 US4150400A (en) 1977-03-31 1977-03-31 Methods of a coarse-scan/fine-print character reproduction with compression

Publications (1)

Publication Number Publication Date
BE864353A true BE864353A (fr) 1978-06-16

Family

ID=25129054

Family Applications (1)

Application Number Title Priority Date Filing Date
BE185512A BE864353A (fr) 1977-03-31 1978-02-27 Procede de reproduction a resolution fine a partir d'un balayage a resolution grossiere

Country Status (5)

Country Link
US (1) US4150400A (fr)
JP (1) JPS5932025B2 (fr)
BE (1) BE864353A (fr)
CA (1) CA1089770A (fr)
GB (1) GB1595004A (fr)

Families Citing this family (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4193096A (en) * 1977-04-04 1980-03-11 Xerox Corporation Half tone encoder/decoder
JPS55602A (en) * 1978-03-22 1980-01-07 Ricoh Co Ltd Predictive restoration method for high-density picture element
JPS54126415A (en) * 1978-03-24 1979-10-01 Ricoh Co Ltd High-density picture element forecasting-restoring method
JPS5510621A (en) * 1978-07-07 1980-01-25 Copyer Co Ltd Method and device for discrimination between inside and outside bordering closed curve
DE2834456C2 (de) * 1978-08-05 1986-01-09 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Einrichtung zur gemischten Aufzeichnung von Rasterbildern und Strichinformationen
US4266249A (en) * 1978-09-19 1981-05-05 Bell Telephone Laboratories, Incorporated Digital encoder for facsimile transmission
US4280144A (en) * 1979-12-03 1981-07-21 International Business Machines Corporation Coarse scan/fine print algorithm
US4364024A (en) * 1979-12-07 1982-12-14 International Business Machines Corporation Signature presentation method and apparatus
DE3002781A1 (de) * 1980-01-26 1981-07-30 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Verfahren zur verbesserten bildwiedergabe in der reproduktionstechnik
US4395697A (en) * 1980-08-15 1983-07-26 Environmental Research Institute Of Michigan Off-image detection circuit for an image analyzer
US4554593A (en) * 1981-01-02 1985-11-19 International Business Machines Corporation Universal thresholder/discriminator
JPS57160264A (en) * 1981-03-30 1982-10-02 Canon Inc Recorder of half tone picture
JPS57189281A (en) * 1981-05-15 1982-11-20 Nippon Telegr & Teleph Corp <Ntt> Dot pattern generation and processing system for character recording
US4437122A (en) 1981-09-12 1984-03-13 Xerox Corporation Low resolution raster images
EP0132453B1 (fr) * 1983-07-29 1987-05-27 DR.-ING. RUDOLF HELL GmbH Procédé et appareil pour minimiser des erreurs lors du traitement numérique de signaux électriques
EP0132455A1 (fr) * 1983-07-29 1985-02-13 DR.-ING. RUDOLF HELL GmbH Procédé et appareil pour la représentation de lignes graphiques à haute définition
JPS6038973A (ja) * 1983-08-11 1985-02-28 Dainippon Screen Mfg Co Ltd 境界画素の処理方法
EP0204763A4 (fr) * 1984-11-16 1989-03-09 Konstantine Beridze Systeme d'ordinateur a compression de donnees et procede.
JPS61203785A (ja) * 1985-03-07 1986-09-09 Dainippon Screen Mfg Co Ltd ２値画像デ−タの平滑化処理方法及びその装置
US4673987A (en) * 1985-04-22 1987-06-16 Ibm Corporation Compressed block code for facsimile transmission
US4924522A (en) * 1987-08-26 1990-05-08 Ncr Corporation Method and apparatus for displaying a high resolution image on a low resolution CRT
JPH04272680A (ja) * 1990-09-20 1992-09-29 Thermon Mfg Co スイッチ制御形ゾーン式加熱ケーブル及びその組み立て方法
KR960002693B1 (ko) * 1991-07-10 1996-02-24 후지쓰 가부시끼가이샤 화상형성장치
US5486927A (en) * 1991-08-19 1996-01-23 Konica Corporation Digital image forming apparatus using subdivided pixels
US5438437A (en) * 1991-10-17 1995-08-01 Konica Corporation Image forming apparatus with exposure, size, and position correction for pixels
JPH0654203A (ja) * 1992-07-30 1994-02-25 Canon Inc ファクシミリ装置及び画像処理装置
US5357546A (en) * 1992-07-31 1994-10-18 International Business Machines Corporation Multimode and multiple character string run length encoding method and apparatus
US5444552A (en) * 1992-09-28 1995-08-22 Xerox Corporation Method for compressing, processing, and storing grayscale bitmaps
US5602972A (en) * 1993-02-18 1997-02-11 Dainippon Screen Manufacturing Co., Ltd. Pixel and data format conversion processor for gravure
US5638110A (en) * 1993-10-28 1997-06-10 Xerox Corporation Two dimensional slope thresholding in a hyperacuity printer
CA2128858A1 (fr) 1993-10-28 1995-04-29 Douglas N. Curry Interpolation lineaire bidimensionnelle de pentes pour une imprimante
JP3045008B2 (ja) * 1994-06-27 2000-05-22 セイコーエプソン株式会社 ハーフトーン画像の圧縮方式
US5682250A (en) * 1994-12-20 1997-10-28 Xerox Corporation Method and apparatus for reproducing an image without salt and pepper specks
JP3542685B2 (ja) * 1995-06-27 2004-07-14 セイコーエプソン株式会社 マルチトーンをもつバイナリ画像の圧縮及び復元のための装置及び方法
US5657430A (en) * 1996-03-07 1997-08-12 Hewlett-Packard Company Software-based procedure for conversion of a scalable font character bitmap to a gray level bitmap
US5754751A (en) * 1996-03-07 1998-05-19 Hewlett-Packard Company Software-based procedure and apparatus for enhancement of a gray level image
US6608701B1 (en) * 1999-07-07 2003-08-19 Xerox Corporation Compact high addressability rendering
US6683702B1 (en) 1999-07-07 2004-01-27 Xerox Corporation Compact-dot reproduction of scanned halftone screens
US6535150B1 (en) 1999-09-03 2003-03-18 Whamtech, Inc. Method and apparatus for implementing run-length compression
CN100423082C (zh) * 2006-11-03 2008-10-01 北京京东方光电科技有限公司 一种平板显示器系统内接口单元

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3462547A (en) * 1966-09-06 1969-08-19 Stanford Research Inst Data processing system for signals obtained from a video scanner
US3980809A (en) * 1973-07-16 1976-09-14 International Business Machines Corporation Encoding logic for reduced bandwidth pictorial data transmission system
US4032978A (en) * 1975-01-20 1977-06-28 International Business Machines Corporation Pseudo halftone print generator and method
US3977007A (en) * 1975-06-02 1976-08-24 Teletype Corporation Gray tone generation

Also Published As

Publication number Publication date
JPS53122310A (en) 1978-10-25
CA1089770A (fr) 1980-11-18
JPS5932025B2 (ja) 1984-08-06
GB1595004A (en) 1981-08-05
US4150400A (en) 1979-04-17

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