CN105050234A - Method and device for controlling tunnel lighting condition based on infrared camera image analysis method - Google Patents
Method and device for controlling tunnel lighting condition based on infrared camera image analysis method Download PDFInfo
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- CN105050234A CN105050234A CN201510192996.5A CN201510192996A CN105050234A CN 105050234 A CN105050234 A CN 105050234A CN 201510192996 A CN201510192996 A CN 201510192996A CN 105050234 A CN105050234 A CN 105050234A
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Abstract
The present invention provides a method and a device for controlling the tunnel lighting condition based on the infrared camera image analysis method. According to the technical scheme of the invention, the video information is obtained by means of an infrared camera, and the variation of the images of vehicles traveling in a tunnel and the variation of the background thereof, under different illumination conditions of vehicle lamps, can be avoided as much as possible. In this way, the processing difficulty of the image post processing is reduced. The obtained video information is subjected to image processing, and then the feature information of images can be acquired. Finally, the feature information is encoded to be adopted as control parameters for adjusting the illumination brightness of LED tunnel lamps. Therefore, the above control manner is high in accuracy and can realize the effects of lighting up for vehicles that come up and lighting off for vehicles that drives away. The effective energy-saving effect is realized on the premise that the driving safety in the tunnel is ensured. The method is simple and easy to implement. The device is simple in structure, low in cost and good in usage effect.
Description
Technical field
The present invention relates to highway tunnel illumination technical field, especially a kind of method and device adopting infrared photography image analysis method control tunnel illumination condition.
Background technology
In intelligent illumination control system for highway tunnels runs, the quantity of accurate detection by the vehicle of tunnel nodes, the speed of a motor vehicle of the fastest vehicle, realize tunnel " bright, the car of car low beam is crossed lamp and gone out, provides suitable illumination according to the speed of a motor vehicle ", ensureing key technology effectively energy-conservation under the prerequisite of traffic safety in tunnel.The primary goal of intelligent lighting system ensures safe driving in tunnel, and next is only energy-conservation.Accurate judgement information of sending a car is extremely important, adopted the methods such as geomagnetic method, infrared emission, ultrasonic wave, microwave radar to detect at present, but effect is unsatisfactory.Such as geomagnetism detecting, in practice, vehicle (is overtaken other vehicles in tunnel by ride lines race during certain test point, rule are handed over not allow but actually to have), judged result has two cars, and next test point only detects that a car passes through, system is thought has car to cast anchor in this section, so be set to " altar lamp " in this section, and be set to " no through traffic " in certain track, consequence is very serious.
Summary of the invention
The object of the invention is: a kind of method and the device that adopt infrared photography image analysis method control tunnel illumination condition are provided, its accuracy is high, effectively energy-conservation under the prerequisite ensureing traffic safety in tunnel, overcome the excess illumination of tunnel normal bright lamp illuminator or not enough problem of throwing light on, for driver provides good environment, to improve the fail safe of tunnel driving, to overcome the deficiencies in the prior art.
The present invention is achieved in that the method adopting infrared photography image analysis method to control tunnel illumination condition, in freeway tunnel, test point is set, at each test point installation infrared camera to gather the video information of traffick, again the video information of collection is carried out image procossing, to obtain the characteristic information of image, whether described characteristic information comprises has car by test point, the quantity of sending a car and the fastest road speed of sending a car; The controling parameters adjusted using these data as LED tunnel lamp brightness of illumination.
Described the video information of collection is carried out image procossing specifically comprise the steps:
1) preliminary treatment of vehicle image: after image gray processing, then denoising is carried out to the image of gray processing, obtain pretreatment image;
2) detection is sent a car and counts: the data that background frame difference method is extracted just in time are used for having judged whether car, and take neighbor frame difference method also can extract the displacement information of vehicle operating;
Count results in the detected object unit interval is the driving quantity by this test point;
3) speed of a motor vehicle calculates: the video object extraction algorithm that employing background difference and inter-frame difference combine is to calculate the passage rate of vehicle;
4) information coding: according to the node serial number collected, quantity of sending a car and carry out vehicle speed three characteristic informations and encode, the controling parameters adjusted using this coding as LED tunnel lamp brightness of illumination.
Described image gray processing is to image
rGBthree components are weighted and on average obtain final gray value, the important method of the method adopted, maximum value process, mean value method or weighted mean method.Described image denoising adopts mean filter or medium filtering.
Ir tunnel illumination control apparatus, comprises infrared camera, and infrared camera is connected with DSP scan picture device, and DSP scan picture device is connected with lamp controller, and lamp controller is connected with LED tunnel lamp group.
Owing to have employed above technical scheme, the present invention utilizes infrared photography to obtain video information, the tunnel road map picture that different vehicle light illumination can be avoided to greatest extent to bring and the change of background thereof, be conducive to the difficulty reducing later image process, after the video information of collection is carried out image procossing, obtain the characteristic information of image, the data extracted by background frame difference method are just in time used for having judged whether car, and take neighbor frame difference method also can extract the displacement information of vehicle operating, both combine and can judge whether more accurately to send a car, and other data message of sending a car can be obtained, the video object extraction algorithm combined based on background difference and inter-frame difference calculates car speed, finally using after characteristic information is encoded as the controling parameters of LED tunnel lamp brightness of illumination adjustment.Such mode accuracy is high, realizes tunnel " car low beam bright, car cross lamp and go out ", effectively energy-conservation under the prerequisite ensureing traffic safety in tunnel; Overcome the normal bright lamp illuminator in tunnel, excess illumination or not enough problem of throwing light on, for driver provides good environment, to improve the fail safe of tunnel driving.The inventive method is simple, easy to implement, and the apparatus structure adopted is simple, and with low cost, result of use is good.
Accompanying drawing illustrates,
Accompanying drawing 1 is structural representation of the present invention.
Embodiment,
Embodiments of the invention: adopt infrared photography image analysis method to control the method for tunnel illumination condition, multiple test point is set in highway is compared with long tunnel, at each test point installation infrared camera to gather the video information of traffick, again the video information of collection is carried out image procossing, to obtain the characteristic information of image, whether described characteristic information comprises has car by test point, the quantity of sending a car and the fastest road speed of sending a car; Using these data as the controling parameters of LED tunnel lamp lighting switch and brightness adjustment.
Described the video information of collection is carried out image procossing specifically comprise the steps:
1) preliminary treatment of vehicle image: after image gray processing, then denoising is carried out to the image of gray processing, obtain pretreatment image; The picture quality of camera collection by the impact of various factors, therefore can be necessary to carry out preliminary treatment to original collection image, to improve the quality of image, is conducive to the further analysis to picture material;
1. image gray processing: to image
rGBthree components are weighted and on average obtain final gray value; The present embodiment, for maximum value process, adopts max methods to allow characteristic parameter highlight:
2) detection is sent a car and counts: the data that background frame difference method is extracted just in time are used for having judged whether car, and take neighbor frame difference method also can extract the displacement information of vehicle operating; Both combine and can judge whether more accurately to send a car, and can obtain other data message of sending a car.
Count results in the detected object unit interval is the driving quantity by this test point;
3) speed of a motor vehicle calculates: the video object extraction algorithm that employing background difference and inter-frame difference combine is to calculate the passage rate of vehicle;
4) information coding: according to the node serial number collected, quantity of sending a car and carry out vehicle speed three characteristic informations and encode, using this coding as the controling parameters of LED tunnel lamp lighting switch and brightness adjustment.
That information coding obtains in order to integrated utilization algorithm, in the unit interval vehicle by " node serial number, quantity of sending a car, carry out vehicle speed " three information in tunnel; It " has car " opens illumination, " road speed " in order to adjust the brightness of illumination (being as the criterion with the fastest information of vehicles) of Tunnel Lamp, " quantity of sending a car " for judging whether all enter next section (following up vehicle especially by parallel vehicles during this test point, continuously) through the vehicle of this node, encodes as shown in table 1:
The present invention has two emphasis:
1, detect and measure the accurate quantity of the vehicle by tunnel nodes.
(1) with it, control system has judged whether that car is by this tunnel road, has car, then open the LED tunnel lamp illumination of respective stretch.
(2) control system judges whether all enter into next section by the vehicle of this node with it.Pass through completely if next node detects to send a car, and do not continue to send a car in this section, system can close the LED tunnel lamp illumination of this tunnel road; After in setting, time is up, also do not detect that car is excessively complete, system is set to altar lamp (think and have car to stop in this section) by this tunnel road, and initiatively sends warning.
Target: realize tunnel " car low beam bright, car cross lamp and go out ", effectively energy-conservation under the prerequisite ensureing traffic safety in tunnel.
2, the speed of a motor vehicle of the vehicle by node is calculated.
In tunnel, different road speeds, the demand of driver to tunnel illumination brightness is different.Systems axiol-ogy by this node, the speed of a motor vehicle of the fastest vehicle, the controling parameters that these data adjusts as LED tunnel lamp brightness of illumination, and before this section LED tunnel lamp closedown, always keeping; Have faster vehicle to arrive, these data will refresh.
Target: overcome the normal bright lamp illuminator in tunnel, excess illumination or not enough problem of throwing light on, for driver provides good environment, to improve the fail safe of tunnel driving.
The structure of ir tunnel illumination control apparatus as shown in Figure 1, comprises infrared camera 1, and infrared camera 1 is connected with DSP scan picture device 2, and DSP scan picture device 2 is connected with lamp controller 3, and lamp controller 3 is connected with LED tunnel lamp group 4.
Of the present inventionly be not limited to the embodiment described in embodiment, those skilled in the art's technical scheme according to the present invention draws and other execution mode belongs to technological innovation scope of the present invention equally.Obvious those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (4)
1. the method adopting infrared photography image analysis method to control tunnel illumination condition, it is characterized in that: in freeway tunnel, test point is set, at each test point installation infrared camera to gather the video information of traffick, again the video information of collection is carried out image procossing, to obtain the characteristic information of image, whether described characteristic information comprises has car by test point, the quantity of sending a car and the fastest road speed of sending a car; Using these data as the controling parameters of LED tunnel lamp lighting switch and brightness adjustment.
2. employing infrared photography image analysis method according to claim 1 controls the method for tunnel illumination condition, it is characterized in that: described the video information of collection is carried out image procossing specifically comprise the steps:
1) preliminary treatment of vehicle image: after image gray processing, then denoising is carried out to the image of gray processing, obtain pretreatment image;
2) detection is sent a car and counts: the data that background frame difference method is extracted just in time are used for having judged whether car, and take neighbor frame difference method also can extract the displacement information of vehicle operating;
Count results in the detected object unit interval is the driving quantity by this test point;
3) speed of a motor vehicle calculates: the video object extraction algorithm that employing background difference and inter-frame difference combine is to calculate the passage rate of vehicle;
4) information coding: according to the node serial number collected, quantity of sending a car and carry out vehicle speed three characteristic informations and encode, the controling parameters adjusted using this coding as LED tunnel lamp brightness of illumination.
3. employing infrared photography image analysis method according to claim 2 controls the method for tunnel illumination condition, it is characterized in that: described image gray processing is to image
rGBthree components are weighted and on average obtain final gray value, the important method of the method adopted, maximum value process, mean value method or weighted mean method,
Described image denoising adopts mean filter or medium filtering.
4. one kind adopts the ir tunnel illumination control apparatus of the method for claim 1, comprise infrared camera (1), it is characterized in that: infrared camera (1) is connected with DSP scan picture device (2), DSP scan picture device (2) is connected with lamp controller (3), and lamp controller (3) is connected with LED tunnel lamp group (4).
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Cited By (3)
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| CN110167236A (en) * | 2019-06-21 | 2019-08-23 | 长安大学 | A kind of tunnel illumination control system and control method |
| CN110662330A (en) * | 2019-10-11 | 2020-01-07 | 横店集团得邦照明股份有限公司 | Tunnel lamp dimming and color mixing method based on light induction and vehicle detection |
| CN110774975A (en) * | 2019-11-13 | 2020-02-11 | 上海智驾汽车科技有限公司 | Intelligent light control method and device based on image recognition |
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