EP0347090A2 - Système de surveillance de véhicules - Google Patents
Système de surveillance de véhicules Download PDFInfo
- Publication number
- EP0347090A2 EP0347090A2 EP89305713A EP89305713A EP0347090A2 EP 0347090 A2 EP0347090 A2 EP 0347090A2 EP 89305713 A EP89305713 A EP 89305713A EP 89305713 A EP89305713 A EP 89305713A EP 0347090 A2 EP0347090 A2 EP 0347090A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- vehicle
- monitoring system
- video
- camera
- video frame
- 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- Withdrawn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
Images
Classifications
-
- 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
- G08G1/052—Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed
- G08G1/054—Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed photographing overspeeding vehicles
Definitions
- This invention relates to a vehicle monitoring system for identifying uniquely a moving vehicle using its number plate or some alternative identification mark, and is particularly useful in the policing of speed limits.
- the present invention provides a vehicle monitoring system comprising: a video camera capable of capturing a video frame at any instant; vehicle detecting means responsive to the presence of a moving vehicle to trigger the video camera to capture a video frame at an instant when the image of an identification mark on the vehicle would appear at a predetermined position within the field of view of the camera; a temporary frame store for the captured video frame; and on-line data processing means programmed to identify the image of the identification mark in the frame store and to produce in real time an output signal representing uniquely the detected vehicle.
- a short integration time in the camera may be used to avoid blurring of the image, and existing computer programs may be used in the recognition of the identification mark.
- Such programs recognise alpha numeric characters on a number plate, and have been used to recognise stationary vehicles; it is, however, a preferred feature of the invention that the identification mark should be a machine-readable code such as a bar code, to facilitate the recognition process.
- the camera is operated asynchronously as described in our co-pending U.K. Patent application, publication serial number 2196811A. This enables exposure to be controlled and ensures that there is no complete loss of image should capture be attempted during the field blanking interval. Also an image within the frame will appear at a constant position.
- the camera may be operated in a fully asynchronous mode without disruption of the video timing sequence.
- the invention in another aspect, provides a method of identifying uniquely a moving vehicle which carries a unique identification mark at a known position on the vehicle, using a video camera capable of capturing a video frame at any instant, comprising: detecting when the vehicle reaches a position such that the image of the identification mark would appear at a predetermined position within the field of view of the camera; and processing the video frame to identify the image of the identification mark and to produce, in real time, an output signal representing uniquely the detected vehicle.
- the vehicle detecting means preferably comprises means for detecting when the vehicle reaches a predetermined position relative to the video camera. It also preferably comprises means for determining whether the speed of the vehicle exceeds a predetermined maximum speed and for preventing the said triggering unless the vehicle exceeds that maximum speed.
- the vehicle detecting means comprises means for determining the speed of the vehicle and for providing a signal to the data processing means representative of that speed so that the said output signal includes a representation of the vehicle speed.
- the vehicle monitoring system shown in the drawings comprises a radar 13 having an antenna 12 directed towards traffic along a road, a video camera 14 similarly directed to view the traffic, and an electronic processing system 100 for controlling the radar and the video camera to produce an on-line output 18 and an off-line output 21 for use as hard-copy evidence.
- Each vehicle 10 travelling on the road has a number plate 11, shown in Figure 2 to include an upper portion 11a containing alpha-numeric symbols and a lower portion 11b containing a machine readable code such as a bar code.
- the radar 13 is of the conventional type commonly used for detecting the speed of moving vehicles and for determining the range of a moving vehicle. It sends output signals to a control unit 15 representative of the speed and range of each successive vehicle travelling along the road.
- the control unit 15 determines whether the speed of each vehicle exceeds a predetermined maximum speed limit, and determines also the instant that the vehicle reaches a predetermined range, i.e. a predetermined position on the road. It then sends a trigger signal to cause the video camera 14 to capture a video frame.
- the trigger signal is sent only when a vehicle is found to exceed the speed limit, and is sent only at the instant at which that vehicle reaches the predetermined position.
- the image captured by the video camera 14 contains an image of the number plate 11 at the correct position within the video frame.
- some tolerance is allowable in the position of the image of the number plate within the video frame, to allow for variations on the position of the vehicle in a traffic lane and variations in the relative position of the number plate on the vehicle concerned.
- the video camera is operated according to the asynchronous image capture technique disclosed in our copending U.K. patent application, publication serial number 2196811A.
- the camera comprises a CCD image sensor operated in an asynchronous mode to enable it to capture short-lived events: the image is acquired during an integration period which is triggered by a strobe pulse, and the resulting charge is held in a storage section of the CCD sensor until a regularly occurring field read-out period occurs, during which the charge is read out to constitute a video signal.
- the image may be captured asynchronously with the otherwise periodic operation of the image sensor, there is no danger of an image being lost because its capture is attempted during a field blanking period, and the vehicle number plate will appear at a constant position within the video frame thus greatly facilitating machine identification of the vehicle.
- the processor 17 is programmed to identify within the frame in the frame store 16 the image of the number plate 11, in particular the bar code 11b, and to process the data in this portion so as to recognise uniquely the vehicle from which it was obtained.
- the processor 17 then provides an on-line output signal 18 including, for each detected vehicle, a representation of the vehicle identity and of its speed.
- this output signal is fed to an external processor which interrogates a central computer database containing vehicle registration information, in order to identify the registered keeper of the vehicle which has been driven at an excessive speed.
- This interrogation procedure could also be carried out completely automatically, so that the policing of traffic speeding offences may be carried out entirely automatically right up to the procedure for issuing the summons.
- the output signal 18 may be stored temporarily in a buffer store (not shown) whose contents may be read out periodically.
- a video store 20 is provided, preferably in the form of a video tape recorder.
- Each successive video frame from the camera is sent by way of a buffer 19, under the control of the processor 17, to be stored in the video store 20.
- the video store 20 may be read out, when required at intervals of perhaps 24 hours, in the form of an off-line output signal 21, or video tapes may be removed and replaced with blank tapes.
- Each video frame entering the buffer 19 is identified by a unique signal supplied from the processor 17, which signal includes a representation of the vehicle speed and of the date and time that the measurement took place, together with any further relevant information such as the location of the system. A similar unique signal could be sent also as part of the on-line output signal 18.
- a system could be used to identify those vehicles in respect of which the road fund tax remains unpaid; to enable this to be carried out effectively, it would be convenient if the road fund licence were mounted in some proximity to the number plate, so that it could be detected by the same video camera.
- a system could be arranged to scan for stolen vehicles by checking the identity of the vehicles against files of number plates of stolen vehicles. This system could also be employed to detect other motoring offences such as driving past red traffic lights and evading tolls.
- the integration period for the video camera is of the order of one millisecond, but this period could of course be varied to suit the purpose to which the system is put.
- the speed of operation of the system illustrated is sufficient to record up to 5 vehicles per second, which is well in excess of motorway traffic rates.
- the instant that the vehicle has reached the predetermined position relative to the video camera is determined by the radar 13, this instant could alternatively be determined by means of a separate sensor, for example by the use of an inductive wire positioned beneath the road surface, or by means for detecting when a vehicle obstructs an optical beam directed across its intended path.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Traffic Control Systems (AREA)
- Closed-Circuit Television Systems (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8814175A GB2219881A (en) | 1988-06-15 | 1988-06-15 | Vehicle monitoring system |
GB8814175 | 1988-06-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0347090A2 true EP0347090A2 (fr) | 1989-12-20 |
EP0347090A3 EP0347090A3 (fr) | 1991-03-13 |
Family
ID=10638711
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19890305713 Withdrawn EP0347090A3 (fr) | 1988-06-15 | 1989-06-07 | Système de surveillance de véhicules |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0347090A3 (fr) |
GB (1) | GB2219881A (fr) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0494815A1 (fr) * | 1991-01-11 | 1992-07-15 | Regie Nationale Des Usines Renault S.A. | Système de mesure du trafic de véhicules automobiles |
WO1993009523A1 (fr) * | 1991-11-07 | 1993-05-13 | Traffic Vision Systems International Inc. | Procede utilisant des techniques video pour l'acquisition d'images, l'identification et la velocimetrie d'objets en mouvement |
WO1993019441A1 (fr) * | 1992-03-20 | 1993-09-30 | Commonwealth Scientific And Industrial Research Organisation | Systeme de surveillance de la circulation |
EP0625768A2 (fr) * | 1993-03-31 | 1994-11-23 | Siemens Aktiengesellschaft | Système automatique de collection de droits de péage pour véhicules |
WO1995021424A1 (fr) * | 1994-02-01 | 1995-08-10 | National Westminster Bank Plc. | Systeme pour paiement de peage |
EP0674293A2 (fr) * | 1994-03-24 | 1995-09-27 | Omron Corporation | Système de caméra de véhicule |
EP0978811A2 (fr) * | 1998-08-07 | 2000-02-09 | Siemens Aktiengesellschaft | Procédé et appareil de saisie de durée de trajets de véhicules |
EP0935764B1 (fr) * | 1996-04-01 | 2003-03-19 | Gatsometer B.V. | Procede et appareil permettant de determiner la vitesse et la position d'un vehicule |
US6696978B2 (en) | 2001-06-12 | 2004-02-24 | Koninklijke Philips Electronics N.V. | Combined laser/radar-video speed violation detector for law enforcement |
EP1515547A2 (fr) * | 2003-09-13 | 2005-03-16 | Hella KGaA Hueck & Co. | Dispositif de surveillance opto-électronique pour véhicules automobiles |
US7797995B2 (en) | 2005-11-22 | 2010-09-21 | Schaefer Frank H | Device for checking the tire profile depth and profile type, and the speed and ground clearance of vehicles in motion |
CN103729619B (zh) * | 2013-12-11 | 2016-08-17 | 中国科学院长春光学精密机械与物理研究所 | 道路监控系统中车牌边框的自动识别方法 |
EP3260883A1 (fr) * | 2016-06-24 | 2017-12-27 | AGD Systems Limited | Appareil de détection de véhicules en excès de vitesse |
RU197621U1 (ru) * | 2019-10-17 | 2020-05-18 | Акционерное общество "ЭЛВИС-НеоТек" | Устройство измерения скорости транспортных средств |
EP3690826A1 (fr) * | 2013-03-15 | 2020-08-05 | Balu Subramanya | Système de gestion innovant de stationnement et d'intersections |
US11004337B2 (en) | 2012-12-28 | 2021-05-11 | Balu Subramanya | Advanced parking management system |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1990014640A1 (fr) * | 1989-05-23 | 1990-11-29 | Australian Electro Optics Pty Ltd | Vignette de poste de peage traitee par image optique |
GB2244581B (en) * | 1990-06-02 | 1994-08-31 | Solvit Scient Engineers Limite | Specification of an automatic system to read barcode signs from or on a moving vehicle |
GB2265243A (en) * | 1992-03-21 | 1993-09-22 | Taylor Lann Technology Limited | Apparatus for determining a vehicle registration code |
SE502679C2 (sv) * | 1993-05-28 | 1995-12-04 | Saab Scania Combitech Ab | Förfarande och anordning för registrering av ett fordons förflyttning på ett underlag |
SE516959C2 (sv) * | 1993-05-28 | 2002-03-26 | Combitech Traffic Syst Ab | Förfarande och anordning för registrering av fordon i en vägtull |
US6109525A (en) * | 1993-05-28 | 2000-08-29 | Saab-Scania Combitech Akitiebolag | Method and device for registering vehicles in a road toll facility |
US8692690B2 (en) * | 2011-03-09 | 2014-04-08 | Xerox Corporation | Automated vehicle speed measurement and enforcement method and system |
CN103345844A (zh) * | 2013-07-17 | 2013-10-09 | 南京莱斯信息技术股份有限公司 | 基于视频与线圈复合检测技术的公路车辆监测记录系统 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4567609A (en) * | 1983-03-28 | 1986-01-28 | The United States Of America As Represented By The Secretary Of The Navy | Automatic character recognition system |
WO1987007057A1 (fr) * | 1986-05-05 | 1987-11-19 | Perceptics Corporation | Dispositif de lecture d'une plaque mineralogique |
US4709264A (en) * | 1985-10-02 | 1987-11-24 | Kabushiki Kaisha Toshiba | Picture processing apparatus |
GB2196811A (en) * | 1986-10-25 | 1988-05-05 | English Electric Valve Co Ltd | Triggered image signal generation |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3324283A (en) * | 1963-05-01 | 1967-06-06 | Lan J Chu | Analog multiplier with ratio indicating means |
FR2295495A1 (fr) * | 1974-12-20 | 1976-07-16 | Thomson Csf | Dispositif d'identification a distance d'objets portant une information codee |
DE2754117C2 (de) * | 1977-12-05 | 1987-01-15 | Siemens AG, 1000 Berlin und 8000 München | Einrichtung zur Identifizierung von Fahrzeugen |
GB2089083B (en) * | 1980-10-20 | 1985-02-27 | Dobson Walter Keith | Vehicle idendification system |
US4731854A (en) * | 1986-07-17 | 1988-03-15 | Perceptics Corporation | Optical system for producing an image for a set of characters |
-
1988
- 1988-06-15 GB GB8814175A patent/GB2219881A/en not_active Withdrawn
-
1989
- 1989-06-07 EP EP19890305713 patent/EP0347090A3/fr not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4567609A (en) * | 1983-03-28 | 1986-01-28 | The United States Of America As Represented By The Secretary Of The Navy | Automatic character recognition system |
US4709264A (en) * | 1985-10-02 | 1987-11-24 | Kabushiki Kaisha Toshiba | Picture processing apparatus |
WO1987007057A1 (fr) * | 1986-05-05 | 1987-11-19 | Perceptics Corporation | Dispositif de lecture d'une plaque mineralogique |
GB2196811A (en) * | 1986-10-25 | 1988-05-05 | English Electric Valve Co Ltd | Triggered image signal generation |
Non-Patent Citations (1)
Title |
---|
PROCEEDINGS 1987 CARNAGHAN CONFERENCE ON SECURITY TECHNOLOGY, Atlanta, Georgia, 15th - 17th July 1987, pages 49-57; K. MIZUMACHI: "Automatic license plate identification number" * |
Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0494815A1 (fr) * | 1991-01-11 | 1992-07-15 | Regie Nationale Des Usines Renault S.A. | Système de mesure du trafic de véhicules automobiles |
FR2671653A1 (fr) * | 1991-01-11 | 1992-07-17 | Renault | Systeme de mesure du trafic de vehicules automobiles. |
WO1993009523A1 (fr) * | 1991-11-07 | 1993-05-13 | Traffic Vision Systems International Inc. | Procede utilisant des techniques video pour l'acquisition d'images, l'identification et la velocimetrie d'objets en mouvement |
WO1993019441A1 (fr) * | 1992-03-20 | 1993-09-30 | Commonwealth Scientific And Industrial Research Organisation | Systeme de surveillance de la circulation |
AU671106B2 (en) * | 1992-03-20 | 1996-08-15 | Commonwealth Scientific And Industrial Research Organisation | An object monitoring system |
US5809161A (en) * | 1992-03-20 | 1998-09-15 | Commonwealth Scientific And Industrial Research Organisation | Vehicle monitoring system |
EP0625768A2 (fr) * | 1993-03-31 | 1994-11-23 | Siemens Aktiengesellschaft | Système automatique de collection de droits de péage pour véhicules |
EP0625768A3 (fr) * | 1993-03-31 | 1995-11-08 | Siemens Ag | Système automatique de collection de droits de péage pour véhicules. |
WO1995021424A1 (fr) * | 1994-02-01 | 1995-08-10 | National Westminster Bank Plc. | Systeme pour paiement de peage |
US5857152A (en) * | 1994-02-01 | 1999-01-05 | Mondex International Limited | Electronic toll payment |
GB2301471A (en) * | 1994-02-01 | 1996-12-04 | Nat Westminster Bank Plc | Electronic toll payment |
GB2301471B (en) * | 1994-02-01 | 1997-08-06 | Nat Westminster Bank Plc | Electronic toll payment |
EP0674293A3 (fr) * | 1994-03-24 | 1998-12-30 | Omron Corporation | Système de caméra de véhicule |
EP0674293A2 (fr) * | 1994-03-24 | 1995-09-27 | Omron Corporation | Système de caméra de véhicule |
EP0935764B1 (fr) * | 1996-04-01 | 2003-03-19 | Gatsometer B.V. | Procede et appareil permettant de determiner la vitesse et la position d'un vehicule |
EP0978811A2 (fr) * | 1998-08-07 | 2000-02-09 | Siemens Aktiengesellschaft | Procédé et appareil de saisie de durée de trajets de véhicules |
EP0978811A3 (fr) * | 1998-08-07 | 2000-08-16 | Siemens Aktiengesellschaft | Procédé et appareil de saisie de durée de trajets de véhicules |
US6696978B2 (en) | 2001-06-12 | 2004-02-24 | Koninklijke Philips Electronics N.V. | Combined laser/radar-video speed violation detector for law enforcement |
EP1515547A3 (fr) * | 2003-09-13 | 2005-04-27 | Hella KGaA Hueck & Co. | Dispositif de surveillance opto-électronique pour véhicules automobiles |
EP1515547A2 (fr) * | 2003-09-13 | 2005-03-16 | Hella KGaA Hueck & Co. | Dispositif de surveillance opto-électronique pour véhicules automobiles |
US7797995B2 (en) | 2005-11-22 | 2010-09-21 | Schaefer Frank H | Device for checking the tire profile depth and profile type, and the speed and ground clearance of vehicles in motion |
US11004337B2 (en) | 2012-12-28 | 2021-05-11 | Balu Subramanya | Advanced parking management system |
US11699346B1 (en) | 2012-12-28 | 2023-07-11 | Balu Subramanya | Advanced parking management system |
EP3690826A1 (fr) * | 2013-03-15 | 2020-08-05 | Balu Subramanya | Système de gestion innovant de stationnement et d'intersections |
CN103729619B (zh) * | 2013-12-11 | 2016-08-17 | 中国科学院长春光学精密机械与物理研究所 | 道路监控系统中车牌边框的自动识别方法 |
EP3260883A1 (fr) * | 2016-06-24 | 2017-12-27 | AGD Systems Limited | Appareil de détection de véhicules en excès de vitesse |
RU197621U1 (ru) * | 2019-10-17 | 2020-05-18 | Акционерное общество "ЭЛВИС-НеоТек" | Устройство измерения скорости транспортных средств |
Also Published As
Publication number | Publication date |
---|---|
EP0347090A3 (fr) | 1991-03-13 |
GB2219881A (en) | 1989-12-20 |
GB8814175D0 (en) | 1988-07-20 |
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