GB1481714A - Document detection apparatus - Google Patents

Document detection apparatus

Info

Publication number
GB1481714A
GB1481714A GB51229/74A GB5122974A GB1481714A GB 1481714 A GB1481714 A GB 1481714A GB 51229/74 A GB51229/74 A GB 51229/74A GB 5122974 A GB5122974 A GB 5122974A GB 1481714 A GB1481714 A GB 1481714A
Authority
GB
United Kingdom
Prior art keywords
document
opacity
nov
threshold value
path
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
GB51229/74A
Other languages
English (en)
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.)
Mohawk Data Sciences Corp
Original Assignee
Mohawk Data Sciences 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 Mohawk Data Sciences Corp filed Critical Mohawk Data Sciences Corp
Publication of GB1481714A publication Critical patent/GB1481714A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Conveying Record Carriers (AREA)
  • Character Input (AREA)
  • Length Measuring Devices By Optical Means (AREA)
GB51229/74A 1973-11-29 1974-11-26 Document detection apparatus Expired GB1481714A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US420127A US3873843A (en) 1973-11-29 1973-11-29 Document detection apparatus

Publications (1)

Publication Number Publication Date
GB1481714A true GB1481714A (en) 1977-08-03

Family

ID=23665190

Family Applications (1)

Application Number Title Priority Date Filing Date
GB51229/74A Expired GB1481714A (en) 1973-11-29 1974-11-26 Document detection apparatus

Country Status (5)

Country Link
US (1) US3873843A (enExample)
JP (1) JPS5086933A (enExample)
CA (1) CA1028020A (enExample)
DE (1) DE2456036B2 (enExample)
GB (1) GB1481714A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0445999A1 (en) * 1990-03-09 1991-09-11 International Business Machines Corporation Apparatus and method for detecting the feed of overlapped paper sheets

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064388A (en) * 1974-11-29 1977-12-20 Burroughs Corporation Decoder clutching system for minicomputers
JPS5677962U (enExample) * 1979-11-21 1981-06-24
US4398711A (en) * 1979-12-31 1983-08-16 Ncr Corporation Currency dispenser monitor
US4395127A (en) * 1980-09-11 1983-07-26 The United States Of America As Represented By The Secretary Of The Treasury Optical paper detector
US4510615A (en) * 1981-12-29 1985-04-09 International Business Machines Corporation Magnetic character reader with double document detection
JPS6246389A (ja) * 1985-08-26 1987-02-28 Nec Corp 自動紙送り機能付オンライン手書文字認識装置
GB2265140B (en) * 1992-03-17 1995-10-25 Pitney Bowes Plc An infeed apparatus
US5502312A (en) * 1994-04-05 1996-03-26 Pitney Bowes Inc. Double document detection system having dectector calibration

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3321637A (en) * 1965-08-12 1967-05-23 Rca Corp Check circuit for optical reader employing threshold amplifier
US3628031A (en) * 1969-02-06 1971-12-14 Automata Corp Closed loop control system for automatic sensitivity control of transducer
US3665326A (en) * 1970-03-30 1972-05-23 Us Navy Automatic threshold detector with selectable percentage of threshold crossings
US3614419A (en) * 1970-04-06 1971-10-19 Xerox Corp Multiple sheet detection system
US3734631A (en) * 1971-05-28 1973-05-22 Hewlett Packard Co Nondispersive infrared gas analyzer employing solid state emitters and photodetectors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0445999A1 (en) * 1990-03-09 1991-09-11 International Business Machines Corporation Apparatus and method for detecting the feed of overlapped paper sheets

Also Published As

Publication number Publication date
CA1028020A (en) 1978-03-14
JPS5086933A (enExample) 1975-07-12
DE2456036A1 (de) 1975-06-12
US3873843A (en) 1975-03-25
DE2456036B2 (de) 1979-01-18

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee