DE3787865T2 - Verfahren zur Faksimile-Übertragung und -Kompression. - Google Patents

Verfahren zur Faksimile-Übertragung und -Kompression.

Info

Publication number
DE3787865T2
DE3787865T2 DE87112542T DE3787865T DE3787865T2 DE 3787865 T2 DE3787865 T2 DE 3787865T2 DE 87112542 T DE87112542 T DE 87112542T DE 3787865 T DE3787865 T DE 3787865T DE 3787865 T2 DE3787865 T2 DE 3787865T2
Authority
DE
Germany
Prior art keywords
symbol
document
symbols
prototype
average
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 - Fee Related
Application number
DE87112542T
Other languages
German (de)
English (en)
Other versions
DE3787865D1 (de
Inventor
Richard George Casey
James Cornelius King
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
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of DE3787865D1 publication Critical patent/DE3787865D1/de
Application granted granted Critical
Publication of DE3787865T2 publication Critical patent/DE3787865T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04N1/4115—Bandwidth or redundancy reduction for the transmission or storage or reproduction of two-tone pictures, e.g. black and white pictures involving the recognition of specific patterns, e.g. by symbol matching

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)
  • Character Input (AREA)
  • Character Discrimination (AREA)
  • Editing Of Facsimile Originals (AREA)
  • Facsimiles In General (AREA)
  • Facsimile Transmission Control (AREA)
DE87112542T 1986-10-17 1987-08-28 Verfahren zur Faksimile-Übertragung und -Kompression. Expired - Fee Related DE3787865T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/920,489 US4769716A (en) 1986-10-17 1986-10-17 Facsimile transmission using enhanced symbol prototypes with precalculated front and back white spaces

Publications (2)

Publication Number Publication Date
DE3787865D1 DE3787865D1 (de) 1993-11-25
DE3787865T2 true DE3787865T2 (de) 1994-05-05

Family

ID=25443835

Family Applications (1)

Application Number Title Priority Date Filing Date
DE87112542T Expired - Fee Related DE3787865T2 (de) 1986-10-17 1987-08-28 Verfahren zur Faksimile-Übertragung und -Kompression.

Country Status (4)

Country Link
US (1) US4769716A (cg-RX-API-DMAC7.html)
EP (1) EP0263950B1 (cg-RX-API-DMAC7.html)
JP (1) JPS63108869A (cg-RX-API-DMAC7.html)
DE (1) DE3787865T2 (cg-RX-API-DMAC7.html)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5640607A (en) * 1992-04-21 1997-06-17 Microsoft Corporation Method for sending bit mapped image by appending special code to text string and transmitting the text string separately from compressed residual image
US5706364A (en) * 1995-04-28 1998-01-06 Xerox Corporation Method of producing character templates using unsegmented samples
US5956419A (en) * 1995-04-28 1999-09-21 Xerox Corporation Unsupervised training of character templates using unsegmented samples
US5689620A (en) * 1995-04-28 1997-11-18 Xerox Corporation Automatic training of character templates using a transcription and a two-dimensional image source model
US5883986A (en) * 1995-06-02 1999-03-16 Xerox Corporation Method and system for automatic transcription correction
JP3061765B2 (ja) 1996-05-23 2000-07-10 ゼロックス コーポレイション コンピュータベースの文書処理方法
US5884014A (en) * 1996-05-23 1999-03-16 Xerox Corporation Fontless structured document image representations for efficient rendering
US5835638A (en) * 1996-05-30 1998-11-10 Xerox Corporation Method and apparatus for comparing symbols extracted from binary images of text using topology preserved dilated representations of the symbols
US7519221B1 (en) 2005-02-28 2009-04-14 Adobe Systems Incorporated Reconstructing high-fidelity electronic documents from images via generation of synthetic fonts
US7702182B2 (en) * 2006-02-16 2010-04-20 Adobe Systems, Incorporated Method and apparatus for creating a high-fidelity glyph prototype from low-resolution glyph images
US7697758B2 (en) * 2006-09-11 2010-04-13 Google Inc. Shape clustering and cluster-level manual identification in post optical character recognition processing
US7646921B2 (en) * 2006-09-11 2010-01-12 Google Inc. High resolution replication of document based on shape clustering
US8175394B2 (en) * 2006-09-08 2012-05-08 Google Inc. Shape clustering in post optical character recognition processing
US7650035B2 (en) * 2006-09-11 2010-01-19 Google Inc. Optical character recognition based on shape clustering and multiple optical character recognition processes

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54116121A (en) * 1978-03-01 1979-09-10 Fujitsu Ltd Production system of character train
JPS56100565A (en) * 1980-01-16 1981-08-12 Toshiba Corp Facsimile device
US4463386A (en) * 1982-05-03 1984-07-31 International Business Machines Corporation Facsimile data reduction
US4499596A (en) * 1982-06-28 1985-02-12 International Business Machines Corporation Adaptive facsimile compression using a dynamic extendable decision network
US4494150A (en) * 1982-07-13 1985-01-15 International Business Machines Corporation Word autocorrelation redundancy match facsimile compression for text processing systems
US4499499A (en) * 1982-12-29 1985-02-12 International Business Machines Corporation Method for identification and compression of facsimile symbols in text processing systems
JPS60254871A (ja) * 1984-05-31 1985-12-16 Kokusai Denshin Denwa Co Ltd <Kdd> フアクシミリ画像の符号化方法

Also Published As

Publication number Publication date
EP0263950A3 (en) 1991-03-20
EP0263950A2 (en) 1988-04-20
JPS63108869A (ja) 1988-05-13
US4769716A (en) 1988-09-06
DE3787865D1 (de) 1993-11-25
EP0263950B1 (en) 1993-10-20
JPH0453476B2 (cg-RX-API-DMAC7.html) 1992-08-26

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee