GB2249420B - Improvements in or relating to intruder detection systems - Google Patents

Improvements in or relating to intruder detection systems

Info

Publication number
GB2249420B
GB2249420B GB9023818A GB9023818A GB2249420B GB 2249420 B GB2249420 B GB 2249420B GB 9023818 A GB9023818 A GB 9023818A GB 9023818 A GB9023818 A GB 9023818A GB 2249420 B GB2249420 B GB 2249420B
Authority
GB
United Kingdom
Prior art keywords
relating
detection systems
intruder detection
intruder
systems
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 - Lifetime
Application number
GB9023818A
Other versions
GB2249420A (en
GB9023818D0 (en
Inventor
Christopher George Harris
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.)
Roke Manor Research Ltd
Original Assignee
Roke Manor Research Ltd
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 Roke Manor Research Ltd filed Critical Roke Manor Research Ltd
Priority to GB9023818A priority Critical patent/GB2249420B/en
Publication of GB9023818D0 publication Critical patent/GB9023818D0/en
Publication of GB2249420A publication Critical patent/GB2249420A/en
Application granted granted Critical
Publication of GB2249420B publication Critical patent/GB2249420B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
    • G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
    • G08B13/19602—Image analysis to detect motion of the intruder, e.g. by frame subtraction
    • G08B13/19604—Image analysis to detect motion of the intruder, e.g. by frame subtraction involving reference image or background adaptation with time to compensate for changing conditions, e.g. reference image update on detection of light level change

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Closed-Circuit Television Systems (AREA)
GB9023818A 1990-10-31 1990-10-31 Improvements in or relating to intruder detection systems Expired - Lifetime GB2249420B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9023818A GB2249420B (en) 1990-10-31 1990-10-31 Improvements in or relating to intruder detection systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9023818A GB2249420B (en) 1990-10-31 1990-10-31 Improvements in or relating to intruder detection systems

Publications (3)

Publication Number Publication Date
GB9023818D0 GB9023818D0 (en) 1990-12-12
GB2249420A GB2249420A (en) 1992-05-06
GB2249420B true GB2249420B (en) 1994-10-12

Family

ID=10684737

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9023818A Expired - Lifetime GB2249420B (en) 1990-10-31 1990-10-31 Improvements in or relating to intruder detection systems

Country Status (1)

Country Link
GB (1) GB2249420B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6130707A (en) * 1997-04-14 2000-10-10 Philips Electronics N.A. Corp. Video motion detector with global insensitivity
JP3685730B2 (en) 2001-03-28 2005-08-24 三洋電機株式会社 Image search device and surveillance camera system using the same

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2077014A (en) * 1980-05-09 1981-12-09 Hajime Industries Surveillance method and apparatus
WO1982001454A1 (en) * 1980-10-22 1982-04-29 Mahoney Trevor W Video movement detector
GB2150724A (en) * 1983-11-02 1985-07-03 Christopher Hall Surveillance system
GB2183878A (en) * 1985-10-11 1987-06-10 Matsushita Electric Works Ltd Abnormality supervising system
US4679077A (en) * 1984-11-10 1987-07-07 Matsushita Electric Works, Ltd. Visual Image sensor system
EP0261917A2 (en) * 1986-09-20 1988-03-30 Sony Corporation Detecting changes in video data
WO1988004082A1 (en) * 1986-11-25 1988-06-02 Zone Technology Pty. Limited Digital image acquisition system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2077014A (en) * 1980-05-09 1981-12-09 Hajime Industries Surveillance method and apparatus
WO1982001454A1 (en) * 1980-10-22 1982-04-29 Mahoney Trevor W Video movement detector
GB2150724A (en) * 1983-11-02 1985-07-03 Christopher Hall Surveillance system
US4679077A (en) * 1984-11-10 1987-07-07 Matsushita Electric Works, Ltd. Visual Image sensor system
GB2183878A (en) * 1985-10-11 1987-06-10 Matsushita Electric Works Ltd Abnormality supervising system
EP0261917A2 (en) * 1986-09-20 1988-03-30 Sony Corporation Detecting changes in video data
WO1988004082A1 (en) * 1986-11-25 1988-06-02 Zone Technology Pty. Limited Digital image acquisition system

Also Published As

Publication number Publication date
GB2249420A (en) 1992-05-06
GB9023818D0 (en) 1990-12-12

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20101030