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FR2437124A1 - Codeur numerique pour la transmission de fac-similes - Google Patents

Codeur numerique pour la transmission de fac-similes

Info

Publication number
FR2437124A1
FR2437124A1 FR7922858A FR7922858A FR2437124A1 FR 2437124 A1 FR2437124 A1 FR 2437124A1 FR 7922858 A FR7922858 A FR 7922858A FR 7922858 A FR7922858 A FR 7922858A FR 2437124 A1 FR2437124 A1 FR 2437124A1
Authority
FR
France
Prior art keywords
transmission
network
similes
fac
digital encoder
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
FR7922858A
Other languages
English (en)
Other versions
FR2437124B1 (fr
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of FR2437124A1 publication Critical patent/FR2437124A1/fr
Application granted granted Critical
Publication of FR2437124B1 publication Critical patent/FR2437124B1/fr
Expired 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
    • H04N1/4105—Bandwidth or redundancy reduction for halftone screened pictures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/90—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)
  • Compression Of Band Width Or Redundancy In Fax (AREA)
  • Facsimile Transmission Control (AREA)

Abstract

L'INVENTION CONCERNE LA TRANSMISSION DE FAC-SIMILES. POUR REDUIRE LA QUANTITE D'INFORMATION A TRANSMETTRE, LE CODAGE NUMERIQUE D'UNE INFORMATION EN DEMI-TEINTE PROVENANT D'UNE IMAGE D'ORIGINE S'EFFECTUE A L'AIDE DE RESEAUX 20, 30 SEPARES. LE RESEAU 20 ENGENDRE DES DONNEES DE DETAIL A RESOLUTION ELEVEE CONSTITUEES PAR DES ELEMENTS D'IMAGE NOIRS ET BLANCS QUI CORRESPONDENT AUX PRINCIPAUX CONTOURS DE L'IMAGE, ET LE RESEAU 30 ENGENDRE DES DONNEES DE FOND OU D'ECHELLE DE GRIS, A FAIBLE RESOLUTION QUI DONNENT UNE APPROXIMATION DU NIVEAU DE GRIS DE BLOCS BIDIMENSIONNELS D'ELEMENTS D'IMAGE. APPLICATION A LA TRANSMISSION D'IMAGES EN DEMI-TEINTE SUR LIGNE TELEPHONIQUE.
FR7922858A 1978-09-19 1979-09-13 Codeur numerique pour la transmission de fac-similes Expired FR2437124B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/943,734 US4266249A (en) 1978-09-19 1978-09-19 Digital encoder for facsimile transmission

Publications (2)

Publication Number Publication Date
FR2437124A1 true FR2437124A1 (fr) 1980-04-18
FR2437124B1 FR2437124B1 (fr) 1985-12-27

Family

ID=25480174

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7922858A Expired FR2437124B1 (fr) 1978-09-19 1979-09-13 Codeur numerique pour la transmission de fac-similes

Country Status (6)

Country Link
US (1) US4266249A (fr)
DE (1) DE2953109C2 (fr)
FR (1) FR2437124B1 (fr)
GB (1) GB2052922B (fr)
NL (1) NL7920086A (fr)
WO (1) WO1980000645A1 (fr)

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US4389672A (en) * 1981-02-02 1983-06-21 Bell Telephone Laboratories, Incorporated Display of pseudo-gray scale picture signals on multilevel displays
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US4398890A (en) * 1981-03-16 1983-08-16 Knowlton Kenneth C Representation of designs
CA1189181A (fr) * 1981-05-08 1985-06-18 Stephane Guerillot Procede et dispositif pour la recreation d'un signal analogique de luminance a partir d'un signal numerique
FR2509557B1 (fr) * 1981-07-09 1986-04-11 Agence France Presse Procede pour la recreation d'un signal analogique de luminance a partir d'un signal numerique
US4493106A (en) * 1981-12-24 1985-01-08 International Computers Limited Image digitizing systems
US4580134A (en) * 1982-11-16 1986-04-01 Real Time Design, Inc. Color video system using data compression and decompression
JPS59178077A (ja) * 1983-03-28 1984-10-09 Dainippon Screen Mfg Co Ltd ２値画像のデ−タ圧縮方法
US4546385A (en) * 1983-06-30 1985-10-08 International Business Machines Corporation Data compression method for graphics images
US4559563A (en) * 1983-10-11 1985-12-17 Xerox Corporation Adaptive prediction for binary encoded documents containing a mixture of text, line drawings and halftones
JPS60151789A (ja) * 1984-01-19 1985-08-09 Hitachi Ltd 多機能画像処理プロセツサ
GB2172767B (en) * 1985-01-31 1989-02-08 Canon Kk Image signal processing system
JPS625779A (ja) * 1985-03-04 1987-01-12 Kokusai Denshin Denwa Co Ltd <Kdd> 階調フアクシミリ画像信号の符号化方式
NL8501845A (nl) * 1985-06-27 1987-01-16 Oce Nederland B V Patents And Werkwijze voor het vergroten/verkleinen van ditherbeelden.
US4745473A (en) * 1986-03-24 1988-05-17 Harris Corporation Hybrid image compression system
NL8700182A (nl) * 1987-01-27 1988-08-16 Oce Nederland Bv Werkwijze voor het coderen van beeldinformatie.
DE3816780A1 (de) * 1987-05-18 1988-12-01 Canon Kk Verfahren und einrichtung zur bildverarbeitung
US4982293A (en) * 1988-06-02 1991-01-01 Ricoh Company, Ltd. Method of compressing halftone image data
US4956638A (en) * 1988-09-16 1990-09-11 International Business Machines Corporation Display using ordered dither
US5046027A (en) * 1988-11-08 1991-09-03 Massachusetts General Hospital Apparatus and method for processing and displaying images in a digital procesor based system
JP3005007B2 (ja) * 1989-12-21 2000-01-31 キヤノン株式会社 画像符号化装置
US5543939A (en) * 1989-12-28 1996-08-06 Massachusetts Institute Of Technology Video telephone systems
US5781666A (en) * 1990-04-17 1998-07-14 Canon Kabushiki Kaisha Image processing method and apparatus suitable for both high-resolution and low-resolution image data
US5351138A (en) * 1990-04-24 1994-09-27 Ricoh Company, Ltd. Image area discriminating device
JP2543267B2 (ja) * 1990-11-21 1996-10-16 松下電送株式会社 画像縮小装置と画像表示装置
US5455873A (en) * 1990-12-03 1995-10-03 Information International, Inc. Facsimile dynamic thresholding apparatus and method of use thereof
JP3072776B2 (ja) * 1990-12-19 2000-08-07 キヤノン株式会社 画像処理装置
US5270837A (en) * 1991-09-27 1993-12-14 Apple Computer, Inc. Method and apparatus for enabling intelligent post-processing of differing data types
US5276531A (en) * 1991-09-27 1994-01-04 Apple Computer, Inc. Method and apparatus for high definition imaging
US5345317A (en) * 1991-12-19 1994-09-06 Kokusai Denshin Denwa Kabushiki Kaisha High efficiency coding method for still natural images mingled with bi-level images
KR950000286B1 (ko) * 1992-05-28 1995-01-12 삼성전자 주식회사 산술 부호화 장치 및 방법
US5432870A (en) * 1993-06-30 1995-07-11 Ricoh Corporation Method and apparatus for compressing and decompressing images of documents
JPH08336043A (ja) * 1995-06-07 1996-12-17 Oki Data:Kk ２値画像の縮小変換装置及び拡大変換装置
DE19919624C2 (de) 1999-04-29 2001-03-01 Oce Printing Systems Gmbh Verfahren, System und Computerprogramm zum Komprimieren und Übertragen von Bildrasterdaten
US6683704B1 (en) * 2000-05-12 2004-01-27 Hewlett-Packard Development Company, L.P. Apparatus for determining the best image from a dual resolution photo sensor
US7277585B2 (en) * 2001-05-25 2007-10-02 Ricoh Company, Ltd. Image encoding method, image encoding apparatus and storage medium
JP4169522B2 (ja) * 2002-03-22 2008-10-22 株式会社リコー 画像処理装置、画像処理プログラム及びこのプログラムを記憶する記憶媒体
JP4225320B2 (ja) * 2003-03-27 2009-02-18 セイコーエプソン株式会社 画像出力制御システム、画像出力装置、画像処理装置およびそれらの方法
US20070041054A1 (en) * 2003-03-27 2007-02-22 Toshiaki Kakutani Image output control system, image output device, and image processing device
EP1744539A4 (fr) * 2004-04-22 2008-06-25 Seiko Epson Corp Processeur d"images pour conversion multivaleur en unités de pixels
US20080175209A1 (en) * 2007-01-23 2008-07-24 Sherif Abdel-Kader Passively Scanning According to WLAN Regulatory Domain
CN116779114B (zh) * 2023-08-24 2023-11-03 邹城市人民医院 一种抗肿瘤医疗mri图像信息智能管理系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3953668A (en) * 1975-05-27 1976-04-27 Bell Telephone Laboratories, Incorporated Method and arrangement for eliminating flicker in interlaced ordered dither images
US4084196A (en) * 1977-01-31 1978-04-11 Dacom, Inc. Electronic half-tone generating means for facsimile reproduction system
FR2410401A1 (fr) * 1977-11-28 1979-06-22 Nippon Telegraph & Telephone Appareil codeur de signaux d'image

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US3128838A (en) * 1964-04-14 Bathroom scale
DE1116720B (de) * 1952-11-27 1961-11-09 Deutsche Bundespost Verfahren zur gleichzeitigen Gewinnung zweier Fernsehsignale unterschiedlichen Aufloesungsvermoegens
US2946851A (en) * 1956-03-21 1960-07-26 Bell Telephone Labor Inc Television system having reduced transmission bandwidth
US3377423A (en) * 1963-02-11 1968-04-09 Army Usa Reduced bandwidth binary picture transmission
US3294896A (en) * 1963-07-24 1966-12-27 Bell Telephone Labor Inc Digital encoder for facsimile transmission
US3414677A (en) * 1964-12-28 1968-12-03 Itt Time-bandwidth reduction by dividing binary type signal into groups and producing coded signal of predetermined characteristic in response to each group
DE1268657B (de) * 1965-07-14 1968-05-22 Hell Rudolf Dr Ing Fa Verfahren zur Steigerung der Schaerfe bei der Aufzeichnung der Reproduktionen lichtelektrisch abgetasteter Bildvorlagen
US3462547A (en) * 1966-09-06 1969-08-19 Stanford Research Inst Data processing system for signals obtained from a video scanner
JPS5751310B2 (fr) * 1972-06-07 1982-11-01
US4103287A (en) * 1973-12-17 1978-07-25 Bell Telephone Laboratories, Incorporated Variable length codes for high quality image encoding
US3976826A (en) * 1975-05-07 1976-08-24 Western Electric Company, Inc. Method and apparatus for generating line-by-line picture signal from transformed subpicture information
US4150400A (en) * 1977-03-31 1979-04-17 International Business Machines Corporation Methods of a coarse-scan/fine-print character reproduction with compression

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3953668A (en) * 1975-05-27 1976-04-27 Bell Telephone Laboratories, Incorporated Method and arrangement for eliminating flicker in interlaced ordered dither images
US4084196A (en) * 1977-01-31 1978-04-11 Dacom, Inc. Electronic half-tone generating means for facsimile reproduction system
FR2410401A1 (fr) * 1977-11-28 1979-06-22 Nippon Telegraph & Telephone Appareil codeur de signaux d'image

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/78 *

Also Published As

Publication number Publication date
FR2437124B1 (fr) 1985-12-27
DE2953109C2 (de) 1988-03-31
GB2052922A (en) 1981-01-28
NL7920086A (nl) 1980-07-31
GB2052922B (en) 1983-03-09
WO1980000645A1 (fr) 1980-04-03
DE2953109T1 (de) 1980-12-18
US4266249A (en) 1981-05-05

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Legal Events

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