SE9400761L - Device and method for loading and compressing data for facsimile transmission - Google Patents

Device and method for loading and compressing data for facsimile transmission

Info

Publication number
SE9400761L
SE9400761L SE9400761A SE9400761A SE9400761L SE 9400761 L SE9400761 L SE 9400761L SE 9400761 A SE9400761 A SE 9400761A SE 9400761 A SE9400761 A SE 9400761A SE 9400761 L SE9400761 L SE 9400761L
Authority
SE
Sweden
Prior art keywords
signal
diodes
photo
logic circuit
processing
Prior art date
Application number
SE9400761A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE501875C2 (en
SE9400761D0 (en
Inventor
Robert Forchheimer
Bjoern Wasell
Original Assignee
Integrated Vision Prod
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 Integrated Vision Prod filed Critical Integrated Vision Prod
Priority to SE9400761A priority Critical patent/SE501875C2/en
Publication of SE9400761D0 publication Critical patent/SE9400761D0/en
Priority to AU19050/95A priority patent/AU1905095A/en
Priority to PCT/SE1995/000159 priority patent/WO1995024793A2/en
Publication of SE9400761L publication Critical patent/SE9400761L/en
Publication of SE501875C2 publication Critical patent/SE501875C2/en

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
    • H04N1/413—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information
    • H04N1/417—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information using predictive or differential encoding
    • H04N1/4175—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information using predictive or differential encoding involving the encoding of tone transitions with respect to tone transitions in a reference line

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Facsimile Heads (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Facsimiles In General (AREA)

Abstract

The present invention relates to an arrangement and a method for reading in and compression of data for telefax transmission or document reading. The arrangement comprises photo-diodes (1) arranged on a substrate in matrix form, which photo-diodes, in conjunction with picture-processing and signal-processing circuits linked to the photo-diodes and control logic, are executed in integrated form on one and the same substrate. The aforementioned picture-processing and signal-processing circuits comprise a first logic circuit (6), which is so arranged as to detect picture elements in a signal read in by the photo-diodes, which picture elements satisfy a predetermined digital condition. A second logic circuit (7) is so arranged as to detect the edges of the aforementioned picture elements, and a third logic circuit (8) is so arranged as to eliminate elements detected by preceding circuits from the stored signal. The signal is finally converted in a digital network (17) of a combinative or sequential kind into a compressed form suitable for telefax transmission or document reading.
SE9400761A 1994-03-03 1994-03-03 Device and method for loading and compressing data for facsimile transmission SE501875C2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9400761A SE501875C2 (en) 1994-03-03 1994-03-03 Device and method for loading and compressing data for facsimile transmission
AU19050/95A AU1905095A (en) 1994-03-03 1995-02-16 Arrangement and method for reading in and compression of data for telefax transmission
PCT/SE1995/000159 WO1995024793A2 (en) 1994-03-03 1995-02-16 Arrangement and method for reading in and compression of data for telefax transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9400761A SE501875C2 (en) 1994-03-03 1994-03-03 Device and method for loading and compressing data for facsimile transmission

Publications (3)

Publication Number Publication Date
SE9400761D0 SE9400761D0 (en) 1994-03-03
SE9400761L true SE9400761L (en) 1995-06-12
SE501875C2 SE501875C2 (en) 1995-06-12

Family

ID=20393185

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9400761A SE501875C2 (en) 1994-03-03 1994-03-03 Device and method for loading and compressing data for facsimile transmission

Country Status (3)

Country Link
AU (1) AU1905095A (en)
SE (1) SE501875C2 (en)
WO (1) WO1995024793A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4592243B2 (en) 1999-10-04 2010-12-01 浜松ホトニクス株式会社 High-speed image processing camera system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4499499A (en) * 1982-12-29 1985-02-12 International Business Machines Corporation Method for identification and compression of facsimile symbols in text processing systems
SE431145B (en) * 1983-03-15 1984-01-16 Robert Forchheimer DEVICE IN A MATRIX FORM SET UP PHOTODIODS
JPH01112469A (en) * 1987-10-27 1989-05-01 Fujitsu Ltd Polygonal line approximate system for linear graphic
JP2879824B2 (en) * 1989-05-11 1999-04-05 三菱電機株式会社 Image signal encoder and decoder

Also Published As

Publication number Publication date
AU1905095A (en) 1995-09-25
WO1995024793A3 (en) 1995-10-05
SE501875C2 (en) 1995-06-12
WO1995024793A2 (en) 1995-09-14
SE9400761D0 (en) 1994-03-03

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