FR2386213A1 - 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
FR2386213A1
FR2386213A1 FR7805799A FR7805799A FR2386213A1 FR 2386213 A1 FR2386213 A1 FR 2386213A1 FR 7805799 A FR7805799 A FR 7805799A FR 7805799 A FR7805799 A FR 7805799A FR 2386213 A1 FR2386213 A1 FR 2386213A1
Authority
FR
France
Prior art keywords
reproduction
points
grey scale
pixel
coarse
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.)
Granted
Application number
FR7805799A
Other languages
English (en)
French (fr)
Other versions
FR2386213B1 (xx
Inventor
Kwan Y Wong
Bruce R Schatz
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 US05/783,375 external-priority patent/US4124870A/en
Priority claimed from US05/783,374 external-priority patent/US4150400A/en
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of FR2386213A1 publication Critical patent/FR2386213A1/fr
Application granted granted Critical
Publication of FR2386213B1 publication Critical patent/FR2386213B1/fr
Granted 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
    • H04N1/41—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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • G06T9/005—Statistical coding, e.g. Huffman, run length coding
    • 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)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
FR7805799A 1977-03-31 1978-02-23 Procede de reproduction a resolution fine a partir d'un balayage a resolution grossiere Granted FR2386213A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/783,375 US4124870A (en) 1977-03-31 1977-03-31 Method for improving print quality of coarse-scan/fine-print character reproduction
US05/783,374 US4150400A (en) 1977-03-31 1977-03-31 Methods of a coarse-scan/fine-print character reproduction with compression

Publications (2)

Publication Number Publication Date
FR2386213A1 true FR2386213A1 (fr) 1978-10-27
FR2386213B1 FR2386213B1 (xx) 1980-08-29

Family

ID=27120131

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7805799A Granted FR2386213A1 (fr) 1977-03-31 1978-02-23 Procede de reproduction a resolution fine a partir d'un balayage a resolution grossiere

Country Status (6)

Country Link
BR (1) BR7802022A (xx)
CH (1) CH629348A5 (xx)
DE (1) DE2812821C3 (xx)
FR (1) FR2386213A1 (xx)
IT (1) IT1109994B (xx)
NL (1) NL7803228A (xx)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0084780A2 (de) * 1982-01-21 1983-08-03 DR.-ING. RUDOLF HELL GmbH Verfahren und Schaltungsanordnung zur Richtungsbestimmung einer Vorlagenkontur
FR2550676A1 (fr) * 1983-08-11 1985-02-15 Dainippon Screen Mfg Procede et systeme pour traiter un pixel limitrophe dans un systeme de reproduction d'images
EP0220568A2 (en) * 1985-11-01 1987-05-06 Dainippon Screen Mfg. Co., Ltd. Method of and apparatus for generating high-resolution bilevel image data
FR2605771A1 (fr) * 1985-12-06 1988-04-29 Canon Kk Appareil de traitement de donnees d'images
WO1989008962A1 (en) * 1988-03-16 1989-09-21 Pixie Intelligent Computer Systems A/S Dynamic printing enhancement
EP0369302A2 (en) * 1988-11-17 1990-05-23 Dainippon Screen Mfg. Co., Ltd. Method of and apparatus for producing halftone image
EP0517809A1 (en) * 1990-03-02 1992-12-16 Xerographic Laser Images Corporration Raster print engine driver
EP0528618A2 (en) * 1991-08-21 1993-02-24 Konica Corporation Image forming apparatus
EP0528365A2 (en) * 1991-08-19 1993-02-24 Konica Corporation Image forming apparatus

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4349846A (en) * 1979-04-17 1982-09-14 Ricoh Company, Ltd. Picture processing method
JPS55162179A (en) * 1979-06-02 1980-12-17 Ricoh Co Ltd Picture processing method
DE3002781A1 (de) * 1980-01-26 1981-07-30 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Verfahren zur verbesserten bildwiedergabe in der reproduktionstechnik
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
US6683702B1 (en) * 1999-07-07 2004-01-27 Xerox Corporation Compact-dot reproduction of scanned halftone screens
JP3927388B2 (ja) * 2000-09-27 2007-06-06 株式会社リコー 画像処理装置、画像処理方法及び記録媒体

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2298242A1 (fr) * 1975-01-20 1976-08-13 Ibm Generateur et procede d'impression en pseudo demi-ton

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2779654A (en) * 1949-11-08 1957-01-29 Ferranti Ltd Graphical recording systems
US3928718A (en) * 1973-05-09 1975-12-23 Hitachi Ltd Image reproducing system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2298242A1 (fr) * 1975-01-20 1976-08-13 Ibm Generateur et procede d'impression en pseudo demi-ton

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
NV700/73 *
NV8125/70 *

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0084780A3 (en) * 1982-01-21 1986-03-26 Dr.-Ing. Rudolf Hell Gmbh Method and circuit for determining the direction of contours in a picture
EP0084780A2 (de) * 1982-01-21 1983-08-03 DR.-ING. RUDOLF HELL GmbH Verfahren und Schaltungsanordnung zur Richtungsbestimmung einer Vorlagenkontur
FR2550676A1 (fr) * 1983-08-11 1985-02-15 Dainippon Screen Mfg Procede et systeme pour traiter un pixel limitrophe dans un systeme de reproduction d'images
US4626902A (en) * 1983-08-11 1986-12-02 Dainippon Screen Manufacturing Co., Ltd. Method and system for processing a border pixel
EP0481962A2 (en) * 1985-11-01 1992-04-22 Dainippon Screen Mfg. Co., Ltd. Method of and apparatus for generating high-resolution bilevel image data
EP0220568A2 (en) * 1985-11-01 1987-05-06 Dainippon Screen Mfg. Co., Ltd. Method of and apparatus for generating high-resolution bilevel image data
EP0220568A3 (en) * 1985-11-01 1989-03-22 Dainippon Screen Mfg. Co., Ltd. Method of and apparatus for generating high-resolution bilevel image data
EP0481962A3 (en) * 1985-11-01 1992-10-28 Dainippon Screen Mfg. Co., Ltd. Method of and apparatus for generating high-resolution bilevel image data
FR2605771A1 (fr) * 1985-12-06 1988-04-29 Canon Kk Appareil de traitement de donnees d'images
WO1989008962A1 (en) * 1988-03-16 1989-09-21 Pixie Intelligent Computer Systems A/S Dynamic printing enhancement
EP0369302A2 (en) * 1988-11-17 1990-05-23 Dainippon Screen Mfg. Co., Ltd. Method of and apparatus for producing halftone image
EP0369302A3 (en) * 1988-11-17 1992-11-25 Dainippon Screen Mfg. Co., Ltd. Method of and apparatus for producing halftone image
EP0517809A1 (en) * 1990-03-02 1992-12-16 Xerographic Laser Images Corporration Raster print engine driver
EP0517809A4 (en) * 1990-03-02 1993-02-24 Xerographic Laser Images Corporration Raster print engine driver
EP0528365A2 (en) * 1991-08-19 1993-02-24 Konica Corporation Image forming apparatus
EP0528365A3 (en) * 1991-08-19 1993-03-24 Konica Corporation Image forming apparatus
US5486927A (en) * 1991-08-19 1996-01-23 Konica Corporation Digital image forming apparatus using subdivided pixels
EP0528618A2 (en) * 1991-08-21 1993-02-24 Konica Corporation Image forming apparatus
EP0528618A3 (en) * 1991-08-21 1993-03-17 Konica Corporation Image forming apparatus
US5432611A (en) * 1991-08-21 1995-07-11 Konica Corporation Image forming apparatus with sub-pixel position control
US5473440A (en) * 1991-08-21 1995-12-05 Konica Corporation Color image forming apparatus with density control

Also Published As

Publication number Publication date
BR7802022A (pt) 1979-04-17
DE2812821B2 (de) 1981-07-09
DE2812821A1 (de) 1978-10-05
FR2386213B1 (xx) 1980-08-29
IT1109994B (it) 1985-12-23
NL7803228A (nl) 1978-10-03
CH629348A5 (en) 1982-04-15
DE2812821C3 (de) 1982-04-08
IT7821402A0 (it) 1978-03-21

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Legal Events

Date Code Title Description
ST Notification of lapse