GB2231753A - Traffic incident monitoring with vido cameras - Google Patents
Traffic incident monitoring with vido cameras Download PDFInfo
- Publication number
- GB2231753A GB2231753A GB8910419A GB8910419A GB2231753A GB 2231753 A GB2231753 A GB 2231753A GB 8910419 A GB8910419 A GB 8910419A GB 8910419 A GB8910419 A GB 8910419A GB 2231753 A GB2231753 A GB 2231753A
- Authority
- GB
- United Kingdom
- Prior art keywords
- incident
- camera
- controller
- packet
- site
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/16—Anti-collision systems
- G08G1/164—Centralised systems, e.g. external to vehicles
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/04—Detecting movement of traffic to be counted or controlled using optical or ultrasonic detectors
Description
1 1 MONITORING APPARATUS This invention relates to monitoring apparatus,
particularly, but not exclusively for monitoring traffic flow in a tunnel.
Monitoring apparatus for intruder detection is known, for example that manufactured by the Vision Research Company Limited under the trade name Pixstore 256. Such apparatus generally comprises a video camera connected to a monitor screen via a control unit which is further connected to an intruder detection device eg an infra red, micro wave, ultrasonic or perimeter type device, the control unit actuating an alarm and freezing the image from the video camera at the instant of detection thus allowing a 'snap shot' picture of the intrusion.
It is a disadvantage of such a system that it is only capable of responding to and recording an incident at the time the incident occurs and is thus unsuitable for providing information as to how the incident arose. The system is thus unsuitable for monitoring traffic related incidents.
According to the invention in a first aspect, there is provided monitoring apparatus comprising a camera. an 2 image memory for storing images from the camera, an incident detector for generating an incident detection signal when an incident occurs, the image memory being responsive to the detection signal whereby a plurality of said images prior to the incident are identified; and means for reviewing said prior images.
Preferably, the monitoring apparatus is used for detecting a traffic incident, preferably in a tunnel, the camera being a video camera providing images to a camera controller which stores the images periodically in an image memory. The incident detector preferably comprises a road sensor, for sensing when a vehicle passes in the field of view of the camera and a processor for determining the occupancy of the road and, from this information. it an incident has occurred, the incident detector then generating the incident detection signal.
Claims (27)
1 19 Claims Monitoring apparatus comprising: a camera, an image memory for storing images from the camera, an incident detector for generating an incident detection signal when an incident occurs, the image memory being responsive to the detection signal whereby a plurality of said images prior to the incident are identified; and means for reviewing said prior images.
2. Apparatus as claimed in Claim 1 wherein the camera comprises a video camera.
3. Apparatus as claimed in Claim 1 or Claim 2 wherein the image memory is divided into a plurality of fields each field storing an image frame.
4. Apparatus as claimed in Claim 3 wherein the stored frames are spaced by a time period greater than forty milliseconds.
5. Apparatus as claimed in Claim 3 or Claim 4 wherein the time period between frames is variable.
6. Apparatus as claimed in any one of claims 3 to 5 wherein the number of frames stored is 2 n, where n is greater than 1.
7. Apparatus as claimed in any one of Claims 3 to 6 wherein the image memory comprises a first in first out stack.
8. Apparatus as claimed in any one of Claims 3 to 7 wherein a part or all of the frames of the image memory are frozen in response to the detection signal.
9. Apparatus as claimed in any one of the preceding claims wherein the image memory forms part of a camera controller connected to the camera and to the reviewing means.
10. Apparatus as claimed in Claim 9 wherein the camera controller is selectable to supply either said prior images or post incident images or real time images from the camera to the reviewing means.
11. Apparatus as claimed in any one of the preceding claims wherein the reviewing means is remote from the camera.
12. Apparatus as claimed in any one of the preceding claims wherein the reviewing means comprises a video monitor.
OX !R 1 21
13. Apparatus as claimed in any one of the preceding claims further comprising at least one further camera. each further camera having a respective image memory for storing images from the camera, a plurality of further incident detectors at least one incident detector being operably associated with each camera.
14. Apparatus as claimed in Claim 13 where further comprising a central control means for receiving incident detection signals from the detectors and prior images from the cameras.
15. Apparatus as claimed in Claim 14 wherein the central control means and reviewing means are disposed at the same location.
16. Apparatus as claimed in Claim 14 or 15 wherein the incident detectors are connected to the central control means via a common information transfer bus.
17 Apparatus as claimed in any one of claims 13 to 16 wherein the detector associated with each camera has a direct connection thereto for sending the detection signal to the camera.
18. Apparatus as claimed in any one of the preceding claims wherein the incident comprises a traffic hazard.
22
19. Apparatus as claimed in Claim 18 wherein the incident detector comprises at least one vehicle sensor for generating a vehicle sensing signal and processing means for receiving said sensing signal and for determining from the signal if an incident has occured.
20. Apparatus as claimed in Claim 19 wherein more than one vehicle sensor is connected to the processing means.
21. Monitoring apparatus comprising a plurality of monitoring stations each having a camera and a localised camera controller, the camera controllers each having an image memory for storing images from the camera; and a remote central controller connected to the camera controllers for selectively receiving said stored images.
22. A method of determining the existence of a traffic incident comprising the steps of measuring the average speed of vehicles passing a sensor in a first time period, measuring the average speed of vehicles passing the sensor in a second time period shorter than the first time period, calculating the difference between the average speeds for the two time periods and of generating an incident detection signal when the difference is above a predetermined threshold.
23. A method as claimed in Claim 22 wherein the first time period is an order of magnitude larger than the second Lime period.
1 23
24. A method as claimed in Claim 22 or Claim 23 wherein said average speeds are continuously updated.
25. A method as claimed in any one of Claims 22 to 24 further comprising the step of comparing the average speeds to first and second thresholds and generating an incident detection signal when the average speeds fall above the first threshold or below the second threshold.
26. Monitoring apparatus substantially as hereinbefore, described with reference to the accompanying drawings.
27. A method of measuring the average speed of vehicles substantially as hereinbefore described with reference to the accompanying drawings.
Published 1990 at The Patent Office. StateHouse.66 71 High Holborn. London WC1R4TP.Further copies maybe obtained from The Patent OfElej_. Sales Branch. St Mary Cray, Orpington. Kent BR5 3RD. Printed by Multiplex techniques ltd, St Mary Cray, Kent. Con. 1187
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8910419A GB2231753A (en) | 1989-05-05 | 1989-05-05 | Traffic incident monitoring with vido cameras |
CA 2016088 CA2016088A1 (en) | 1989-05-05 | 1990-05-04 | Monitoring apparatus |
EP19900304912 EP0396432A3 (en) | 1989-05-05 | 1990-05-04 | Monitoring apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8910419A GB2231753A (en) | 1989-05-05 | 1989-05-05 | Traffic incident monitoring with vido cameras |
Publications (2)
Publication Number | Publication Date |
---|---|
GB8910419D0 GB8910419D0 (en) | 1989-06-21 |
GB2231753A true GB2231753A (en) | 1990-11-21 |
Family
ID=10656310
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8910419A Withdrawn GB2231753A (en) | 1989-05-05 | 1989-05-05 | Traffic incident monitoring with vido cameras |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0396432A3 (en) |
CA (1) | CA2016088A1 (en) |
GB (1) | GB2231753A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2320389A (en) * | 1996-12-12 | 1998-06-17 | Leo Dickinson | Video camera recorder which records via a buffer store so that video data generated before the recorder is switched on is recorded |
US5809161A (en) * | 1992-03-20 | 1998-09-15 | Commonwealth Scientific And Industrial Research Organisation | Vehicle monitoring system |
GB2352072A (en) * | 1999-06-23 | 2001-01-17 | Abbas Haydari | Recording and playback system |
CN107507414A (en) * | 2017-07-05 | 2017-12-22 | 湖北鑫美企业发展股份有限公司 | A kind of crossroad access flow-monitoring device |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT398011B (en) * | 1989-06-08 | 1994-08-25 | Alcatel Austria Ag | DEVICE FOR MONITORING SPEED LIMITS OF TRAFFIC PARTICIPANTS |
FR2667710B1 (en) * | 1990-10-05 | 1994-09-02 | Francis Guillot | DEVICE FOR DETECTING ANOMALIES OF INTEGRATED TRAFFIC ON SITE IN A CABINET. |
NL9300671A (en) * | 1993-04-20 | 1994-11-16 | Gatsometer Bv | Method and device for electronically recording an event, for example a traffic violation. |
KR100234851B1 (en) * | 1994-03-24 | 1999-12-15 | 타테이시 요시오 | Vehicle image pick-up system and vehicle image pick-up method |
US5982418A (en) * | 1996-04-22 | 1999-11-09 | Sensormatic Electronics Corporation | Distributed video data storage in video surveillance system |
FR2763726B1 (en) * | 1997-05-20 | 2003-01-17 | Bouchaib Hoummadi | METHOD FOR MANAGING ROAD TRAFFIC BY VIDEO CAMERA |
FR2785432B1 (en) * | 1998-10-30 | 2001-01-19 | Citilog | METHOD FOR ANALYZING THE CONDITION OF A TRACK PORTION AND ITS ENVIRONMENT |
AU1089300A (en) | 1999-11-03 | 2001-05-14 | Cet Technologies Pte Ltd | Image processing techniques for a video based traffic monitoring system and methods therefor |
EP1189442A3 (en) * | 2000-09-13 | 2003-04-09 | Dynamit Nobel GmbH Explosivstoff- und Systemtechnik | Surveillance of an area by still image collating |
ATE301861T1 (en) * | 2000-12-30 | 2005-08-15 | Goddert Peters | TUNNEL MONITORING SYSTEM IN A TUNNEL |
JP3788400B2 (en) * | 2002-07-19 | 2006-06-21 | 住友電気工業株式会社 | Image processing apparatus, image processing method, and vehicle monitoring system |
US7986339B2 (en) * | 2003-06-12 | 2011-07-26 | Redflex Traffic Systems Pty Ltd | Automated traffic violation monitoring and reporting system with combined video and still-image data |
EP1671293A4 (en) * | 2003-10-09 | 2009-04-22 | Moreton Bay Corp Pty Ltd | System and method for image monitoring |
FR2884018A1 (en) * | 2005-03-31 | 2006-10-06 | Neavia Technologies Soc Par Ac | Impeding object e.g. damaged vehicle, presence detecting method for use on road segment, involves counting vehicles present on segment and controlling automatic activation of image processing based on counting |
EP2084689B1 (en) * | 2006-11-15 | 2010-09-29 | Aitek S.P.A. | Method and apparatus for determining the distance between two vehicles running along a road or motorway section, particularly in a tunnel |
DE102007044820B4 (en) * | 2007-09-20 | 2009-06-18 | Insta Elektro Gmbh | Bus system and method for its operation |
FR2928221B1 (en) | 2008-02-28 | 2013-10-18 | Neavia Technologies | METHOD AND DEVICE FOR MULTI-TECHNOLOGY DETECTION OF A VEHICLE |
CN102682601B (en) * | 2012-05-04 | 2014-02-26 | 南京大学 | Expressway traffic incident detection method based on optimized support vector machine (SVM) |
WO2017116325A1 (en) * | 2015-12-30 | 2017-07-06 | Hasan Kalyoncu Universitesi | Real time vehicle detection through highway tunnels |
CN105788269A (en) * | 2016-05-12 | 2016-07-20 | 招商局重庆交通科研设计院有限公司 | Unmanned aerial vehicle-based abnormal traffic identification method |
NO342011B1 (en) * | 2016-06-16 | 2018-03-12 | Roxel Aanestad As | Tunnel monitoring system and method of operation |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0005532A1 (en) * | 1978-05-19 | 1979-11-28 | Raffaele Conte | Apparatus mounted on a vehicle for recording of accidents |
EP0137320A2 (en) * | 1983-09-14 | 1985-04-17 | Atis Assmann Gmbh | Video surveillance device |
WO1988009023A1 (en) * | 1987-05-08 | 1988-11-17 | Viktor Szabo | Accident data recorder |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2082432A5 (en) * | 1970-03-16 | 1971-12-10 | Evr | |
DE3015737A1 (en) * | 1979-04-30 | 1980-11-13 | Eumig | Motor car monitor with TV camera - has floating head magnetic memory coupled to camera, with interference switch and storage selector |
GB2064189A (en) * | 1979-11-09 | 1981-06-10 | Ascotts Ltd | Surveillance System |
FR2593309B1 (en) * | 1986-01-23 | 1990-02-16 | Gestion Inf Nle Et | DEVICE AND METHOD FOR REMOTE MONITORING OF SITES INCLUDING MEANS FOR DETECTION OF ABNORMAL EVENTS, MEANS FOR LISTENING TO PHONES AND MEANS FOR VIDEO OBSERVATION |
-
1989
- 1989-05-05 GB GB8910419A patent/GB2231753A/en not_active Withdrawn
-
1990
- 1990-05-04 EP EP19900304912 patent/EP0396432A3/en not_active Withdrawn
- 1990-05-04 CA CA 2016088 patent/CA2016088A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0005532A1 (en) * | 1978-05-19 | 1979-11-28 | Raffaele Conte | Apparatus mounted on a vehicle for recording of accidents |
EP0137320A2 (en) * | 1983-09-14 | 1985-04-17 | Atis Assmann Gmbh | Video surveillance device |
WO1988009023A1 (en) * | 1987-05-08 | 1988-11-17 | Viktor Szabo | Accident data recorder |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5809161A (en) * | 1992-03-20 | 1998-09-15 | Commonwealth Scientific And Industrial Research Organisation | Vehicle monitoring system |
GB2320389A (en) * | 1996-12-12 | 1998-06-17 | Leo Dickinson | Video camera recorder which records via a buffer store so that video data generated before the recorder is switched on is recorded |
GB2320389B (en) * | 1996-12-12 | 2000-08-09 | Leo Dickinson | Video recording device |
GB2352072A (en) * | 1999-06-23 | 2001-01-17 | Abbas Haydari | Recording and playback system |
CN107507414A (en) * | 2017-07-05 | 2017-12-22 | 湖北鑫美企业发展股份有限公司 | A kind of crossroad access flow-monitoring device |
CN107507414B (en) * | 2017-07-05 | 2020-12-11 | 湖北鑫美企业发展股份有限公司 | Cross road traffic flow monitoring device |
Also Published As
Publication number | Publication date |
---|---|
EP0396432A3 (en) | 1991-04-10 |
EP0396432A2 (en) | 1990-11-07 |
CA2016088A1 (en) | 1990-11-05 |
GB8910419D0 (en) | 1989-06-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |