DE3175836D1 - Video signal detector - Google Patents

Video signal detector

Info

Publication number
DE3175836D1
DE3175836D1 DE8181107298T DE3175836T DE3175836D1 DE 3175836 D1 DE3175836 D1 DE 3175836D1 DE 8181107298 T DE8181107298 T DE 8181107298T DE 3175836 T DE3175836 T DE 3175836T DE 3175836 D1 DE3175836 D1 DE 3175836D1
Authority
DE
Germany
Prior art keywords
video signal
signal detector
detector
video
signal
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
Application number
DE8181107298T
Other languages
English (en)
Inventor
Nils Gustaf Stalberg
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
Application granted granted Critical
Publication of DE3175836D1 publication Critical patent/DE3175836D1/de
Expired legal-status Critical Current

Links

Classifications

    • 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)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Image Input (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Manipulation Of Pulses (AREA)
DE8181107298T 1980-10-08 1981-09-16 Video signal detector Expired DE3175836D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8007037A SE448921B (sv) 1980-10-08 1980-10-08 Videosignaldetektor for detektering av inkommande analoga videosignaler fran en optisk dokumentlesare och for avgivande av digitala utgangssignaler

Publications (1)

Publication Number Publication Date
DE3175836D1 true DE3175836D1 (en) 1987-02-19

Family

ID=20341932

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8181107298T Expired DE3175836D1 (en) 1980-10-08 1981-09-16 Video signal detector

Country Status (5)

Country Link
US (1) US4447774A (de)
EP (1) EP0049388B1 (de)
JP (1) JPS5784679A (de)
DE (1) DE3175836D1 (de)
SE (1) SE448921B (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5873280A (ja) * 1981-10-27 1983-05-02 Hitachi Ltd 信号２値化処理装置
EP0082236B1 (de) * 1981-12-23 1986-03-12 International Business Machines Corporation Zeichenerkennungsverfahren für einen optischen Dokumentenleser
ES2039493T3 (es) * 1987-04-22 1993-10-01 Abbott Laboratories Lectores y formatos de codigo optico.
US6191626B1 (en) * 1998-08-17 2001-02-20 Texas Instruments Incorporated Method and apparatus for compensating input threshold variations on input buffers
US7330164B2 (en) * 2003-08-25 2008-02-12 Thomson Licensing Video controlled detector sensitivity

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3566281A (en) * 1968-05-21 1971-02-23 Ibm Electric pulse wave clipping circuitry
US3599148A (en) * 1969-04-22 1971-08-10 Burroughs Corp Quantizing circuit correction for character recognition systems
US3599151A (en) * 1969-12-29 1971-08-10 Ibm Character recognition photosensing apparatus having a threshold comparator circuit
US3912943A (en) * 1974-08-09 1975-10-14 Ibm Video thresholder
JPS5356918A (en) * 1976-11-01 1978-05-23 Oki Electric Ind Co Ltd Picture read system
US4121121A (en) * 1977-09-13 1978-10-17 Computer Identics Corporation Follower response control circuit
JPS5579567A (en) * 1978-12-12 1980-06-16 Ricoh Co Ltd Shading correction system
US4227218A (en) * 1978-12-14 1980-10-07 Exxon Research & Engineering Co. Method and apparatus for generating a digital facsimile signal

Also Published As

Publication number Publication date
JPS6156672B2 (de) 1986-12-03
US4447774A (en) 1984-05-08
EP0049388A2 (de) 1982-04-14
EP0049388A3 (en) 1984-08-22
EP0049388B1 (de) 1987-01-14
SE448921B (sv) 1987-03-23
JPS5784679A (en) 1982-05-27
SE8007037L (sv) 1982-04-09

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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