DE2757456C2 - - Google Patents

Info

Publication number
DE2757456C2
DE2757456C2 DE2757456A DE2757456A DE2757456C2 DE 2757456 C2 DE2757456 C2 DE 2757456C2 DE 2757456 A DE2757456 A DE 2757456A DE 2757456 A DE2757456 A DE 2757456A DE 2757456 C2 DE2757456 C2 DE 2757456C2
Authority
DE
Germany
Prior art keywords
value
counter
picture elements
background
gray
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
DE2757456A
Other languages
German (de)
English (en)
Other versions
DE2757456A1 (de
Inventor
Dale R. Keller Tex. Us Duvall
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.)
RECOGNITION EQUIPMENT Inc DALLAS TEX US
Original Assignee
RECOGNITION EQUIPMENT Inc DALLAS TEX US
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 RECOGNITION EQUIPMENT Inc DALLAS TEX US filed Critical RECOGNITION EQUIPMENT Inc DALLAS TEX US
Publication of DE2757456A1 publication Critical patent/DE2757456A1/de
Application granted granted Critical
Publication of DE2757456C2 publication Critical patent/DE2757456C2/de
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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 OR CALCULATING; 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)
  • Facsimile Image Signal Circuits (AREA)
  • Image Analysis (AREA)
  • Holo Graphy (AREA)
  • Character Input (AREA)
  • Character Discrimination (AREA)
DE19772757456 1976-12-22 1977-12-22 Korrelator fuer videoverarbeitung Granted DE2757456A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/753,665 US4162481A (en) 1976-12-22 1976-12-22 Adaptive correlator for video processing

Publications (2)

Publication Number Publication Date
DE2757456A1 DE2757456A1 (de) 1978-06-29
DE2757456C2 true DE2757456C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1988-04-14

Family

ID=25031634

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19772757456 Granted DE2757456A1 (de) 1976-12-22 1977-12-22 Korrelator fuer videoverarbeitung

Country Status (7)

Country Link
US (1) US4162481A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2757456A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2375663A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1555825A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL7712454A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NO (1) NO774397L (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
SE (1) SE441222B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19536170A1 (de) * 1995-09-29 1997-04-03 Ibm Ermittlung von Schwellwerten bei der Digitalisierung von Bildern durch eine Verteilungsanalyse der Informationen

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4244029A (en) * 1977-12-12 1981-01-06 Goodyear Aerospace Corporation Digital video correlator
US4200861A (en) * 1978-09-01 1980-04-29 View Engineering, Inc. Pattern recognition apparatus and method
US4326258A (en) * 1980-01-31 1982-04-20 Ncr Canada Ltd - Ncr Canada Ltee Method and apparatus for reducing the gray scale resolution of a digitized image
DE3019836A1 (de) * 1980-05-23 1982-01-21 Siemens AG, 1000 Berlin und 8000 München Verfahren zum automatischen erkennen von bild- und text- oder graphikbereichen auf druckvorlagen
US4475234A (en) * 1981-02-04 1984-10-02 Nippon Electric Co., Ltd. Binary pattern signal producing apparatus for optical character recognition
US4408343A (en) * 1981-02-27 1983-10-04 Burroughs Corporation Image enhancement for optical character readers
US4542527A (en) * 1982-05-17 1985-09-17 Tokyo Shibaura Denki Kabushiki Kaisha Image processing device for continuously extracting features of small regions of an image
JP2569303B2 (ja) * 1985-07-05 1997-01-08 日本電装株式会社 画像デ−タの累積加算を行う画像処理装置
US4799268A (en) * 1985-11-12 1989-01-17 Usm Corporation Lead sense system for component insertion machine
JPS62278682A (ja) * 1986-05-27 1987-12-03 Fanuc Ltd 画像処理装置
US4949391A (en) * 1986-09-26 1990-08-14 Everex Ti Corporation Adaptive image acquisition system
US5025480A (en) * 1987-03-23 1991-06-18 Eastman Kodak Company Background referencing
US4882629A (en) * 1987-05-08 1989-11-21 Everex Ti Corporation Adaptive exposure control system
GB2205464B (en) * 1987-06-05 1991-12-11 Gec Avionics Image processing apparatus
US4982294A (en) * 1987-07-24 1991-01-01 Eastman Kodak Company Apparatus for enhancing and thresholding scanned microfilm images and methods for use therein
US4853795A (en) * 1987-07-24 1989-08-01 Eastman Kodak Company Forward look ahead techniques for tracking background and noise levels in scanned video images
US5042076A (en) * 1988-12-02 1991-08-20 Electrocom Automation, Inc. Programmable optical character recognition
US5029226A (en) * 1989-10-10 1991-07-02 Unisys Corporation Method and apparatus for effecting spot/void filtering of image data
US5065443A (en) * 1989-12-04 1991-11-12 Allen-Bradley Company, Inc. Image processor with illumination variation compensation
US5245421A (en) * 1990-09-19 1993-09-14 Control Automation, Incorporated Apparatus for inspecting printed circuit boards with surface mounted components
US5133022A (en) * 1991-02-06 1992-07-21 Recognition Equipment Incorporated Normalizing correlator for video processing
DE19836770C1 (de) * 1998-08-13 2000-04-20 Siemens Ag Verfahren zur kapazitiven Bilderfassung
DE19841001C1 (de) * 1998-09-08 2000-04-20 Siemens Ag Verfahren und Vorrichtung zur kapazitiven Bilderfassung
US7565034B2 (en) * 2004-06-17 2009-07-21 Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. Determination of a navigation window in an optical navigation system

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL268306A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1957-05-17
GB1117170A (en) * 1966-12-15 1968-06-19 Mullard Ltd Improvements in or relating to apparatus for determining a suitable threshold level with which to detect a wanted signal in the presence of noise
US3622802A (en) * 1969-05-15 1971-11-23 Recognition Equipment Inc Differential amplifier system
US3723970A (en) * 1971-01-04 1973-03-27 Scan Optics Inc Optical character recognition system
US3761876A (en) * 1971-07-28 1973-09-25 Recognition Equipment Inc Recognition unit for optical character reading system
US3705383A (en) * 1971-08-06 1972-12-05 William W Frayer Biological sample pattern analysis method and apparatus
US3737855A (en) * 1971-09-30 1973-06-05 Ibm Character video enhancement system
JPS5231134B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1972-01-24 1977-08-12
US3999047A (en) * 1972-09-05 1976-12-21 Green James E Method and apparatus utilizing color algebra for analyzing scene regions
US3918049A (en) * 1972-12-26 1975-11-04 Ibm Thresholder for analog signals
US3973239A (en) * 1973-10-17 1976-08-03 Hitachi, Ltd. Pattern preliminary processing system
IT1055651B (it) * 1975-11-03 1982-01-11 Elsag Sistema elettronico per la lettura di simboli

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19536170A1 (de) * 1995-09-29 1997-04-03 Ibm Ermittlung von Schwellwerten bei der Digitalisierung von Bildern durch eine Verteilungsanalyse der Informationen

Also Published As

Publication number Publication date
SE441222B (sv) 1985-09-16
FR2375663B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1984-08-24
GB1555825A (en) 1979-11-14
NL7712454A (nl) 1978-06-26
US4162481A (en) 1979-07-24
FR2375663A1 (fr) 1978-07-21
SE7714269L (sv) 1978-06-23
NO774397L (no) 1978-06-23
DE2757456A1 (de) 1978-06-29

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Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
D2 Grant after examination
8363 Opposition against the patent
8339 Ceased/non-payment of the annual fee