CN100507970C - Red light overriding detection system and method based on digital video camera - Google Patents
Red light overriding detection system and method based on digital video camera Download PDFInfo
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- CN100507970C CN100507970C CNB2007101217932A CN200710121793A CN100507970C CN 100507970 C CN100507970 C CN 100507970C CN B2007101217932 A CNB2007101217932 A CN B2007101217932A CN 200710121793 A CN200710121793 A CN 200710121793A CN 100507970 C CN100507970 C CN 100507970C
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Abstract
The invention relates to a digital video camera based red light running detection system and method, wherein a high-definition digital video camera is used for road monitoring. The red light running detection system mainly comprises front end devices and ground devices. A digital video camera (1) among the front end devices is used for collecting crossing images, and the images are transmitted to an industrial control computer (9) through a front end optical terminal (2), optical fiber (6) and a ground optical terminal (10) as one of the ground devices in turn. The industrial control computer is used for identifying behaviors of a vehicle in accordance with the set detection parameters and present signal light status. The computer is also used for extracting information of the red light running vehicle, acquiring information of the vehicle license plate, and storing and managing the image sequence or video flow before and after red light running and the information of the license plate. The invention needs only a high-definition digital video camera for monitoring double lane vehicles in a same direction, and no separate panoramic video camera is needed for photographing the signal light status, so the detection system makes violation identification more powerful.
Description
Technical field
The present invention relates to a kind of make a dash across the red light pick-up unit and method of the digital camera based on high resolving power (resolution is more than 1280*1024), adopt high resolution digital camera to carry out road monitoring, is a kind of automatic video frequency detection method.
Background technology
Under prior art, it is very universal that traffic control department employing video means is carried out road monitoring, these methods generally are by the camera acquisition road traffic condition, and the image information of obtaining is sent to remote control center, carry out manual monitoring by the demonstration of display; And can handle the image that video camera obtains, obtain the traffic (as vehicle flowrate, the speed of a motor vehicle etc.) of road.For vehicles peccancy such as making a dash across the red light, need obtain vehicle pictures clearly by several video camera or cameras that point to each track respectively that are installed in the crossing, the vehicle pictures that picture that panoramic camera is obtained and close shot video camera obtain combines, the information of the discerning vehicles peccancy line item of going forward side by side.
The technological deficiency of existing system is significantly, and outstanding behaviours is aspect two:
The one, with high costs.On a direction at a crossing, a panoramic camera and the close shot video camera or the camera that equal number of lanes must be installed at least, the detection of making a dash across the red light that could not omit no blind spot, system cost is high.
The 2nd, in law enforcement, there is leak.Owing in panoramic camera, be beyond recognition the license plate information of vehicles peccancy, the picture of vehicle license clearly that only has close shot video camera or camera to provide, vehicles peccancy in proof panoramic camera pictures taken and the vehicle in the license plate picture be exist on same the car jural not rigorous.
Summary of the invention
For overcoming the above-mentioned defective of prior art, the invention provides a kind of make a dash across the red light pick-up unit and method based on high-resolution camera, this method not only can reduce equipment cost greatly when guaranteeing the effective detection that realizes making a dash across the red light, can also solve the leak that existence is gone up in law enforcement.
The present invention realizes that the overall technological scheme of above-mentioned purpose is as follows:
1, by using the high-resolution digital camera to obtain crossing consecutive image information.This image information covers some tracks and front signal lamp on the direction in crossing, on this image, both can observe the vehicle peccancy process that has comprised red light information, also has vehicle license information clearly.
2, obtain the behavioural information of travelling of vehicle according to the consecutive image that obtains, the line trace of going forward side by side.And according to detected parameters and the current demand signal lamp state set, behavior is judged to vehicle, the sequence of pictures or the Video stream information of record vehicles running red light.
3, vehicles running red light is carried out information extraction, obtain information such as vehicle license, the sequence of pictures of line front and back or the information such as licence plate of video flowing and this vehicle are stored and managed more.
The pick-up unit that makes a dash across the red light based on high resolution digital camera among the present invention mainly includes front-end equipment and uphole equipment;
Front-end equipment mainly includes The Cloud Terrace, protective cover 5, is installed in digital camera 1 (resolution is more than 1280*1024), front end fiber optic 2, stabilized voltage supply 3 in the protective cover.Wherein, high resolution digital camera 1 links to each other by 1394 patchcords with front end fiber optic 2, and front end fiber optic 2 is connected by optical fiber 6 with ground light terminal 10;
Uphole equipment mainly includes industrial computer 9, ground light terminal 10 that detection system software is installed and 1394 patchcords that connect industrial computer 9 and ground light terminal 10; Also be equipped with in the industrial computer 9 and be used for and 1394 capture cards of ground light terminal 10 transmission signals and any switching value input-output card of red signal transmission signals use.
Described front-end equipment also includes and is used for increasing night the light filling lamp 8 crossing illuminance, that be connected with stabilized voltage supply 3.
The method of using the above-mentioned pick-up unit that makes a dash across the red light that road is monitored is characterized in that this method realizes according to the following steps:
1) starts industrial computer 9, the operation red light overriding detection system;
2) digital camera in the front-end equipment 1 obtains current crossing image and this image is transferred to front end fiber optic 2, front end fiber optic 2 is converted into light signal with data image signal, and reach ground light terminal 10 in the uphole equipment by optical fiber 6, ground light terminal 10 is converted into digital signal with light signal again, and imports industrial computer 9 into by 1394 capture cards;
3) the switching value input-output card imports current demand signal lamp state into industrial computer 9 by judging the signal lamp level state;
4) the red light overriding detection system software in the industrial computer 9 is by handling the crossing image, obtain the driving information of vehicle, and binding signal lamp state judges whether to make a dash across the red light, then vehicle is preserved at sequence of pictures or video flowing before and after the stop line, and the record details
Concrete grammar is:
I) industrial computer 9 carries out self-regulation according to the image information of camera acquisition to the shutter of video camera and the gain of image;
Ii) the crossing image that collects is carried out extracting based on the target of background subtraction point-score, vehicle and pedestrian in the surveyed area will be identified as foreground target, extract the driving vehicle target by the judgement to contrast, area grayscale, area and the depth-width ratio of foreground target;
Iii), promptly the line behavior more of vehicle target is judged, and judged by reading the signal lamp state whether vehicle makes a dash across the red light by the vehicle stop line that on image, marks according to the detection line and the basis for estimation of making a dash across the red light; As make a dash across the red light, then extract vehicle place lane information, model and colouring information respectively according to vehicle position, area and color;
Iv) the license plate information of the target vehicle that makes a dash across the red light is extracted, carry out the car plate location, at first by a kind of marginal information that obtains vehicle based on the method for detecting area of edge detection algorithm, can determine license plate area according to the information such as area, length breadth ratio and gray scale of licence plate then, for the basis is done in car plate identification;
V) the license board information in the license plate area of calibrating is discerned by carry out car plate based on the OCR technology of neural network, obtained the license plate information of vehicle.
Vi) with vehicle more before the line and more sequence of pictures or the video flowing behind the line store and the time of record current record in text, unique serial number, vehicle place lane information, vehicle model size information, vehicle color information and the license plate number information of each picture.
The present invention only uses a high-resolution digital camera just can monitor equidirectional two-way traffic vehicle, and need not to use special license plate area positioning shooting machine or camera just can carry out license plate identification to the vehicle on the track, simultaneously because picture region covers signal lamp, so need not to set up independent panoramic camera to take the signal lamp state, make detection system stronger in judgement law enforcement violating the regulations.
The present invention has outstanding advantage:
1, reduce cost: system only uses a video camera just can finish all enter the monitoring and the judgement violating the regulations of crossing vehicle on two tracks, compare with the other system of present existence, saved the cost of two video cameras or a video camera and a camera at least.System need not carry out the construction of any broken road on the road surface, does not need to bury underground magnetic test coil, greatly facilitates to use and reduced cost.
2, law enforcement is strong: because the scene that high resolution digital camera is taken can cover crossing vehicle and signal lamp simultaneously, candid photograph by process that vehicle is made a dash across the red light, acquisition can clear identifying plate photograph the vehicle panoramic picture behind the line more before the line and more, the state of displaing lamp clearly in the image simultaneously, information is detailed complete, for punishment provides rigorous law enforcement foundation.
3, advanced technology: native system can manually be selected interested Video Detection zone and detection line violating the regulations by the coordinate of setting surveyed area, in surveyed area, just can efficiently select road vehicles accurately and need not road pavement carry out any construction, and can eliminate effectively that the road surface occurs as interference such as pedestrian and bicycles.Car plate location technology and car plate 0CR means by the advanced person just can realize the accurate identification to vehicle license information.In addition, can also also discern efficiently relevant informations such as vehicle, vehicle color.
4, record is full and accurate: system is after detecting vehicles running red light, can with vehicle before line more panoramic picture and the panoramic picture behind the line or the video flowing of process violating the regulations are stored more, the information stores that will comprise the vehicle peccancy moment, panoramic pictures numbering, track, vehicles peccancy place, the vehicles peccancy trade mark and other more vehicle condition simultaneously is convenient to the classification and the retrieval of bulk information in log file.Simultaneity factor also is equipped with record management software, can look like to manage and look into accent to the fathogram of preserving, and greatly facilitates use.
In addition, native system also has plurality of advantages such as easy to use, that recognition speed is fast, recognition efficiency is high, extensibility is strong.
Description of drawings
Fig. 1 front-end equipment structural representation
Fig. 2 uphole equipment structural representation
Fig. 3 system operational scheme synoptic diagram
Fig. 4 method flow diagram
The process picture 1 that Fig. 5 native system extracts
The process picture 2 that Fig. 6 native system extracts
The license board information figure that Fig. 7 extracts
Among the figure: 1, digital camera, 2, the front end fiber optic, 3, stabilized voltage supply, 4,1394 patchcords, 5, protective cover, 6, optical fiber, 7, power lead, 8, the light filling lamp, 9, industrial computer, 10, ground light terminal, 11, power supply, 12, ground cabinet cabinet, 13, red signal.
Embodiment
Describe present embodiment in detail below in conjunction with Fig. 1～Fig. 4.
The pick-up unit that makes a dash across the red light based on high resolution digital camera mainly includes front-end equipment and uphole equipment.Wherein,
As shown in Figure 1, front-end equipment include The Cloud Terrace, protective cover 5, be installed in high resolution digital camera 1 (resolution is 1280*1024), front end fiber optic 2, stabilized voltage supply 3 (12V), the light filling lamp 8 (infrared light or visible light) in the protective cover and connect video camera 1 and front end fiber optic 2 1394 patchcords, be connected the optical fiber 6 of front end fiber optic 2 and ground light terminal 10.
As shown in Figure 2, uphole equipment comprises: 1394 patchcords of industrial computer 9, ground light terminal 10, connection industrial computer 9 and the ground light terminal 10 of detection system software are installed.In addition, in industrial computer 9, also install 1394 capture cards and arbitrarily switching value input-output card (native system adopt be the AC6652 integrated circuit board) use with ground light terminal 10 and red signal 13 transmission signals respectively to be used for industrial computer 9.Uphole equipment also includes the The Cloud Terrace lens controller and debugs the anti-line of netting twine that uses optional.
As shown in Figure 3, Figure 4, the present embodiment operational scheme based on above hardware device is:
1) starts after the industrial computer 9 the operation red light overriding detection system;
2) high resolution digital camera 1 of front end obtains the picture rich in detail at current crossing, and this image is transferred to front end fiber optic 2, front end fiber optic 2 is converted into light signal with digital signal, reach ground light terminal 10 by optical fiber 6, be converted into digital signal again, import industrial computer 9 into by 1394 capture cards;
3) switching value input-output card (AC6652) imports current demand signal lamp state into industrial computer by judging the signal lamp level state;
4) the red light overriding detection system software in the industrial computer 9 is by analyzing the crossing image, obtain the driving information of vehicle, and binding signal lamp state judges whether violating the regulations making a dash across the red light, then vehicle is preserved at sequence of pictures or video flowing before and after the stop line, and the record details:
Concrete grammar is:
I) image information of gathering according to digital camera 1 is carried out self-regulation to the shutter of video camera and the gain of image, to reach good detection effect.To adopt light filling lamp 8 to increase the crossing illuminance at night under the situation;
Ii) the crossing image that collects is carried out extracting based on the target of background subtraction point-score, select suitable surveyed area (being traditionally arranged to be the track stop line) according to road scene afterwards to the zone, road surface between the video camera present position, vehicle and pedestrian in the surveyed area will be identified as foreground target, extract the driving vehicle target by the judgement to contrast, area grayscale, area and the depth-width ratio of foreground target.
The background subtraction point-score that adopts in the present embodiment is: at first obtain the road background image under no car situation, make additive operation with the background image of current input image and preservation then, obtain error image, can differentiate and whether have automobile storage to exist in the current input image by error image being carried out processing such as binaryzation.
Iii) according to the detection line and the basis for estimation of making a dash across the red light, promptly the line behavior more of vehicle target is judged by the vehicle stop line that on image, marks, and judge by reading the signal lamp state whether vehicle makes a dash across the red light, as make a dash across the red light and then extract track, vehicle place letter, model and colouring information respectively according to vehicle position, elemental area and color;
Iv) the license plate information of the target vehicle that makes a dash across the red light is extracted, at first carry out car plate location, by a kind of marginal information (it is that 3 * 3 flat structure matrix carries out the morphology rim detection to image that system has adopted size) that at first obtains vehicle based on the method for detecting area of edge detection algorithm.Can determine license plate area according to area, length breadth ratio and the half-tone information of licence plate then;
V) the license board information in the license plate area of calibrating is discerned by carry out car plate based on the OCR technology of neural network, obtained the license plate information of vehicle.Be used to discern the masterplate of car plate also for using the neural network algorithm training sample to obtain here;
Vi) with vehicle more before the line and more sequence of pictures or the video flowing behind the line store and the time of record current record in text, unique serial number, vehicle place lane information, vehicle model size information, vehicle color information and the license plate number information of each picture.
Adopt this method to detect, the process picture of its extraction such as Fig. 5, shown in Figure 6, the license board information in the image has realized purpose of the present invention as shown in Figure 7.
Claims (3)
1, based on the pick-up unit that makes a dash across the red light of digital camera, it is characterized in that: include front-end equipment and uphole equipment;
Front-end equipment includes The Cloud Terrace, protective cover (5), is installed in digital camera (1), front end fiber optic (2), stabilized voltage supply (3) in the protective cover (5); Wherein, digital camera (1) links to each other by 1394 patchcords with front end fiber optic (2), and front end fiber optic (2) is connected by optical fiber (6) with ground light terminal (10);
Uphole equipment includes industrial computer (9), ground light terminal (10) that detection system software is installed and 1394 patchcords that connect industrial computer (9) and ground light terminal (10); 1394 capture cards and the transmission signals lamp state of switch amount input-output card that are used for ground light terminal (10) transmission signals also are installed in the industrial computer (9);
The resolution of described digital camera (1) is greater than 1280*1024.
2, the pick-up unit that makes a dash across the red light based on digital camera according to claim 1 is characterized in that: described front-end equipment also includes the light filling lamp (8) that is used for increasing night the crossing illuminance.
3, a kind of described method of road being monitored based on the pick-up unit that makes a dash across the red light of digital camera of claim 1 of using is characterized in that this method realizes according to the following steps:
1) starts industrial computer (9), the operation red light overriding detection system;
2) digital camera in the front-end equipment (1) obtains current crossing image and is transferred to front end fiber optic (2), front end fiber optic (2) is converted into light signal with data image signal, and reach ground light terminal (10) in the uphole equipment by optical fiber (6), ground light terminal (10) is converted into digital signal with light signal again, and imports industrial computer (9) into by 1394 capture cards;
3) the switching value input-output card in the industrial computer (9) imports current demand signal lamp state into industrial computer (9) by judging the signal lamp level state;
4) the red light overriding detection system software in the industrial computer (9) is by handling the crossing image, obtain the driving information of vehicle, and binding signal lamp state judges whether to make a dash across the red light, then vehicle is preserved at sequence of pictures or video flowing before and after the stop line, and the record details:
Concrete grammar is:
I) industrial computer (9) carries out self-regulation according to the image information of digital camera (1) collection to the shutter of digital camera (1) and the gain of image;
Ii) the crossing image that collects is carried out extracting based on the target of background subtraction point-score, vehicle and pedestrian in the surveyed area are identified as foreground target, extract the driving vehicle target by the judgement to contrast, area grayscale, area and the depth-width ratio of foreground target;
Iii), promptly the line behavior more of vehicle target is judged, and judged by reading the signal lamp state whether vehicle makes a dash across the red light by the vehicle stop line that on image, marks according to the detection line and the basis for estimation of making a dash across the red light; As make a dash across the red light, then extract vehicle place lane information, model and colouring information respectively according to vehicle position, elemental area and color;
Iv) the license plate information of the target vehicle that makes a dash across the red light is extracted: carry out the car plate location, at first obtain the marginal information of vehicle, determine license plate area according to elemental area, length breadth ratio and the half-tone information of licence plate then by a kind of method for detecting area based on edge detection algorithm;
V) the license board information in the license plate area of calibrating is discerned by carry out car plate based on the OCR technology of neural network, obtained the license plate information of vehicle;
Vi) with vehicle more before the line and more sequence of pictures or the video flowing behind the line store and the time of record current record in text, unique serial number, vehicle place lane information, vehicle model size information, vehicle color information and the license plate number information of each picture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101217932A CN100507970C (en) | 2007-09-14 | 2007-09-14 | Red light overriding detection system and method based on digital video camera |
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| CNB2007101217932A CN100507970C (en) | 2007-09-14 | 2007-09-14 | Red light overriding detection system and method based on digital video camera |
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| CN101123039A CN101123039A (en) | 2008-02-13 |
| CN100507970C true CN100507970C (en) | 2009-07-01 |
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