NL7514285A - Detectiesysteem. - Google Patents

Detectiesysteem.

Info

Publication number
NL7514285A
NL7514285A NL7514285A NL7514285A NL7514285A NL 7514285 A NL7514285 A NL 7514285A NL 7514285 A NL7514285 A NL 7514285A NL 7514285 A NL7514285 A NL 7514285A NL 7514285 A NL7514285 A NL 7514285A
Authority
NL
Netherlands
Prior art keywords
detection system
detection
Prior art date
Application number
NL7514285A
Other languages
English (en)
Original Assignee
Xerox 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 Xerox Corp filed Critical Xerox Corp
Publication of NL7514285A publication Critical patent/NL7514285A/nl

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
    • H04N1/40—Picture signal circuits
    • H04N1/403—Discrimination between the two tones in the picture signal of a two-tone original
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
    • G06V30/10—Character recognition
    • G06V30/16—Image preprocessing
    • G06V30/162—Quantising the image signal
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
    • G06V30/10—Character recognition

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Signal Processing (AREA)
  • Character Input (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Length Measuring Devices By Optical Means (AREA)
NL7514285A 1975-01-22 1975-12-08 Detectiesysteem. NL7514285A (nl)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/543,024 US3987413A (en) 1975-01-22 1975-01-22 Detection system

Publications (1)

Publication Number Publication Date
NL7514285A true NL7514285A (nl) 1976-07-26

Family

ID=24166275

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7514285A NL7514285A (nl) 1975-01-22 1975-12-08 Detectiesysteem.

Country Status (7)

Country Link
US (1) US3987413A (nl)
JP (1) JPS5197940A (nl)
DE (1) DE2553077A1 (nl)
FR (1) FR2298833A1 (nl)
GB (1) GB1524376A (nl)
NL (1) NL7514285A (nl)
SE (1) SE7514702L (nl)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2837139C3 (de) * 1978-08-25 1982-02-25 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Verfahren und Schaltungsanordnung zur Impulsaufsteilung
FR2437125A1 (fr) * 1978-09-21 1980-04-18 Cit Alcatel Dispositif de traitement d'un signal d'analyse d'image
US4398221A (en) * 1980-09-01 1983-08-09 Ricoh Company, Ltd. Facsimile apparatus
US4525747A (en) * 1981-08-06 1985-06-25 Toshiyuki Sakai Analog-to-digital image signal conversion
JPH0719275B2 (ja) * 1986-07-08 1995-03-06 住友電気工業株式会社 二値化回路
JP2724006B2 (ja) * 1989-11-16 1998-03-09 オリンパス光学工業株式会社 ２値化回路

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3004224A (en) * 1956-10-04 1961-10-10 Sylvania Electric Prod Variable gain circuit with outputs equal to product of selective inputs
US3187305A (en) * 1960-10-03 1965-06-01 Ibm Character recognition systems
US3202042A (en) * 1962-08-06 1965-08-24 Jamieson Ballard System for measuring separately background and average line luminance or density
USB420712I5 (nl) * 1964-12-23
GB1214153A (en) * 1967-07-31 1970-12-02 Nat Res Dev Apparatus for analysing signals comprising excursions from a nominally constant background level
US3599148A (en) * 1969-04-22 1971-08-10 Burroughs Corp Quantizing circuit correction for character recognition systems
US3660601A (en) * 1970-06-10 1972-05-02 Ibm Frequency detection system
US3879707A (en) * 1972-12-20 1975-04-22 Ibm Character recognition system for bar coded characters

Also Published As

Publication number Publication date
SE7514702L (sv) 1976-07-23
FR2298833B1 (nl) 1979-06-29
GB1524376A (en) 1978-09-13
DE2553077A1 (de) 1976-07-29
JPS5197940A (nl) 1976-08-28
US3987413A (en) 1976-10-19
FR2298833A1 (fr) 1976-08-20

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Legal Events

Date Code Title Description
BV The patent application has lapsed