CN110444026B - Triggering snapshot method and system for vehicle - Google Patents
Triggering snapshot method and system for vehicle Download PDFInfo
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- CN110444026B CN110444026B CN201910721335.5A CN201910721335A CN110444026B CN 110444026 B CN110444026 B CN 110444026B CN 201910721335 A CN201910721335 A CN 201910721335A CN 110444026 B CN110444026 B CN 110444026B
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Abstract
The invention provides a triggering snapshot method and system for a vehicle, wherein the method comprises the following steps: obtaining the vehicle density of the vehicles in the target area; according to the vehicle intensity to image acquisition device and/or radar in the target area send working mode switching signal, wherein, working mode switching signal is used for instructing image acquisition device and/or radar adopt with the working mode that the vehicle intensity corresponds is right vehicle in the target area triggers the snapshot under the condition that the vehicle intensity is higher than first threshold value, only pass through image acquisition device is right vehicle in the target area triggers the snapshot, adopt above-mentioned technical scheme, solved among the related art, under the high condition of the vehicle intensity of road, the radar is not high scheduling problem to the identification accuracy and the recognition efficiency of vehicle.
Description
Technical Field
The invention relates to the field of millimeter wave radar radars, in particular to a triggering snapshot method and system for a vehicle.
Background
At present, a commonly used snapshot recognition system for a highway generally comprises a radar speed measurement module and a video recognition module, wherein the radar speed measurement module is used for measuring the running speed of a vehicle, the video recognition module is used for recognizing the license plate of an overspeed vehicle, the radar speed measurement module is limited by the running state (such as speed, vehicle following, parallel running and vehicle length) of the vehicle, and certainly, in the application field with high requirements on vehicle capture and license plate recognition, the video recognition equipped with the radar speed measurement module does not meet the requirements on vehicle capture and recognition of the whole section any more.
In the related technology, only after the speed exceeds a certain threshold value, single-time trigger snapshot can be carried out, but under the condition that the vehicle runs in parallel or follows the vehicle or is at a low speed, the false capture rate and the missing capture rate of the vehicle detected by the radar speed measurement module are higher, so that the camera cannot be accurately guided to carry out snapshot of the vehicle, and in addition, the microwave radar has the defects of weak electron resistance, clutter and multipath reflection capability, low precision and the like; under the condition that the road vehicle density is high, the detection capability of the microwave radar is greatly reduced, an accurate vehicle snapshot position cannot be provided, and only a corresponding lane camera can be informed to snapshot, so that the recognition efficiency and accuracy of the image snapshot are affected, and particularly under the condition that the vehicle runs across the lane, the influence degree is larger.
Aiming at the problems that in the related art, under the condition that the vehicle density of a road is high, the identification accuracy and identification efficiency of a radar to the vehicle are not high, and the like, an effective technical scheme is not provided.
Disclosure of Invention
The embodiment of the invention provides a vehicle triggering snapshot method and system, which are used for at least solving the problems of low vehicle identification accuracy and identification efficiency of a radar under the condition of high vehicle density of a road in the related technology.
According to an embodiment of the invention, a triggering snapshot method of a vehicle is provided, which includes: obtaining the vehicle density of the vehicles in the target area; and sending a working mode switching signal to an image acquisition device and/or a radar in the target area according to the vehicle intensity, wherein the working mode switching signal is used for indicating the image acquisition device and/or the radar to trigger and snapshot the vehicle in the target area by adopting a working mode corresponding to the vehicle intensity, and under the condition that the vehicle intensity is higher than a first threshold value, triggering and snapshot the vehicle in the target area only through the image acquisition device.
In an embodiment of the present invention, sending a working mode switching signal to an image capturing device and/or a radar in the target area according to the density of the vehicle includes: under the condition that the vehicle density is higher than the first threshold, triggering and capturing the vehicles in the target area only through the image acquisition device, wherein the triggering and capturing comprises the following steps: sending a first working mode switching signal to an image acquisition device in the target area according to the vehicle density so that the image acquisition device triggers and captures the vehicles in the target area; under the condition that the vehicle density is smaller than the first threshold and higher than a second threshold, sending a second working mode switching signal to an image acquisition device and a radar in the target area according to the vehicle density so that the image acquisition device and the radar can trigger and capture the vehicle in the target area; and under the condition that the vehicle density is smaller than the second threshold value, sending a third working mode switching signal to the radar in the target area according to the vehicle density so that the radar can trigger and capture the vehicle in the target area.
In an embodiment of the present invention, in a case where the radar performs trigger snapshot on the vehicle in the target area, or in a case where the image acquisition device and the radar perform trigger snapshot on the vehicle in the target area, the method further includes: when the vehicle is detected to trigger a preset detection section, acquiring at least one of the following information of the vehicle passing through the detection section through a radar: the first time information, the vehicle head position information and the identification ID of the millimeter wave radar vehicle.
In an embodiment of the present invention, in a case where the image capturing device performs trigger capture on the vehicle in the target area, or in a case where the image capturing device and the radar perform trigger capture on the vehicle in the target area, the method further includes: when the vehicle is detected to trigger a preset simulation trigger line, acquiring at least one of the following information of the vehicle passing through the detection section through the image acquisition device: license plate information, picture information, second time information and identification ID of the camera vehicle.
In an embodiment of the present invention, in a case where a vehicle in the target area is triggered to be captured by an image acquisition device and a radar, the method further includes: and matching the first time information and the second time information, and matching the identification ID of the millimeter wave radar vehicle and the identification ID of the camera vehicle to acquire a trigger snapshot record of the same vehicle.
In the embodiment of the present invention, obtaining the vehicle density of the vehicle in the target area includes: acquiring the average speed of the vehicle in the target area; determining the vehicle density according to the average speed, wherein the vehicle density is determined to be higher than the first threshold value when the average speed is higher than a fourth threshold value; if the average speed is less than a fourth threshold and above a fifth threshold, determining that the vehicle is dense less than the first threshold and above a second threshold; determining that the vehicle density is less than the second threshold in a case where the average speed is less than a fifth threshold.
There is also provided, in accordance with another embodiment of the present invention, a trigger snapshot system of a vehicle, including: the vehicle speed detector is used for acquiring the vehicle density of the vehicles in the target area and reporting the vehicle density to the controller; the controller is connected with the vehicle speed detector and used for sending a working mode switching signal to the image acquisition device and/or the radar in the target area according to the vehicle intensity, wherein the working mode switching signal is used for indicating the image acquisition device and/or the radar to trigger and snapshot the vehicle in the target area by adopting a working mode corresponding to the vehicle intensity, and under the condition that the vehicle intensity is higher than a first threshold value, the vehicle in the target area is triggered and snapshot only through the image acquisition device.
Optionally, the controller is further configured to trigger snapshot, only by the image capturing device, of the vehicle in the target area if the vehicle density is higher than the first threshold, and includes: sending a first working mode switching signal to an image acquisition device in the target area according to the vehicle density so that the image acquisition device triggers and captures the vehicles in the target area; under the condition that the vehicle density is smaller than the first threshold and higher than a second threshold, sending a second working mode switching signal to an image acquisition device and a radar in the target area according to the vehicle density so that the image acquisition device and the radar can trigger and capture the vehicle in the target area; and under the condition that the vehicle density is smaller than the second threshold value, sending a third working mode switching signal to the radar in the target area according to the vehicle density so that the radar can trigger and capture the vehicle in the target area.
Optionally, the system further comprises: the radar is connected with the controller and used for acquiring at least one of the following information when the vehicle is detected to trigger a preset detection section under the condition that the vehicle in the target area is triggered and captured by the radar or the vehicle in the target area is triggered and captured by the image acquisition device and the radar: the first time information, the vehicle head position information and the identification ID of the millimeter wave radar vehicle.
Optionally, the system further comprises: the image acquisition device is connected with the controller and used for acquiring at least one of the following information when the vehicle is detected to trigger a preset simulation trigger line under the condition that the vehicle in the target area is triggered and captured by the image acquisition device or the vehicle in the target area is triggered and captured by the image acquisition device and a radar: license plate information, picture information, second time information and identification ID of the camera vehicle.
According to the invention, the vehicle density of the vehicles in the target area is obtained; according to the vehicle intensity to image acquisition device and/or radar in the target area send working mode switching signal, wherein, working mode switching signal is used for instructing image acquisition device and/or radar adopt with the working mode that the vehicle intensity corresponds is right vehicle in the target area triggers the snapshot under the condition that the vehicle intensity is higher than first threshold value, only pass through image acquisition device is right vehicle in the target area triggers the snapshot, adopt above-mentioned technical scheme, solved among the relevant technology, under the high condition of the vehicle intensity of road, the radar is not high to the recognition accuracy and the recognition efficiency scheduling problem of vehicle, and then has improved the recognition accuracy and the recognition efficiency of vehicle.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a flow chart of a method of triggering a snapshot of a vehicle according to an embodiment of the present invention;
fig. 2 is a block diagram of a trigger snapshot system of a vehicle according to an embodiment of the present invention;
fig. 3 is another structural block diagram of a trigger snapshot system of a vehicle according to an embodiment of the present invention;
fig. 4 is a block diagram of a trigger snapshot system according to a preferred embodiment of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
According to an embodiment of the present invention, there is provided a method for triggering snapshot of a vehicle, and fig. 1 is a flowchart of the method for triggering snapshot of a vehicle according to the embodiment of the present invention, as shown in fig. 1, including:
step S102, obtaining the vehicle density of the vehicles in the target area;
step S104, sending a working mode switching signal to an image acquisition device and/or a radar in the target area according to the vehicle density, wherein the working mode switching signal is used for indicating the image acquisition device and/or the radar to trigger and snapshot the vehicle in the target area by adopting a working mode corresponding to the vehicle density, and under the condition that the vehicle density is higher than a first threshold value, triggering and snapshot the vehicle in the target area only through the image acquisition device.
According to the invention, the vehicle density of the vehicles in the target area is obtained; according to the vehicle intensity to image acquisition device and/or radar in the target area send working mode switching signal, wherein, working mode switching signal is used for instructing image acquisition device and/or radar adopt with the working mode that the vehicle intensity corresponds is right vehicle in the target area triggers the snapshot under the condition that the vehicle intensity is higher than first threshold value, only pass through image acquisition device is right vehicle in the target area triggers the snapshot, adopt above-mentioned technical scheme, solved among the relevant technology, under the high condition of the vehicle intensity of road, the radar is not high to the recognition accuracy and the recognition efficiency scheduling problem of vehicle, and then has improved the recognition accuracy and the recognition efficiency of vehicle.
In the embodiment of the present invention, step S104 may be implemented by:
1) under the condition that the vehicle density is higher than the first threshold, triggering and capturing the vehicles in the target area only through the image acquisition device, wherein the triggering and capturing comprises the following steps: sending a first working mode switching signal to an image acquisition device in the target area according to the vehicle density so that the image acquisition device triggers and captures the vehicles in the target area;
2) under the condition that the vehicle density is smaller than the first threshold and higher than a second threshold, sending a second working mode switching signal to an image acquisition device and a radar in the target area according to the vehicle density so that the image acquisition device and the radar can trigger and capture the vehicle in the target area;
3) and under the condition that the vehicle density is smaller than the second threshold value, sending a third working mode switching signal to the radar in the target area according to the vehicle density so that the radar can trigger and capture the vehicle in the target area.
In an embodiment of the present invention, in a case where the radar performs trigger snapshot on the vehicle in the target area, or in a case where the image acquisition device and the radar perform trigger snapshot on the vehicle in the target area, the method further includes: when the vehicle is detected to trigger a preset detection section, acquiring at least one of the following information of the vehicle passing through the detection section through a radar: the first time information, the vehicle head position information and the identification ID of the millimeter wave radar vehicle.
In an embodiment of the present invention, in a case where the image capturing device performs trigger capture on the vehicle in the target area, or in a case where the image capturing device and the radar perform trigger capture on the vehicle in the target area, the method further includes: when the vehicle is detected to trigger a preset simulation trigger line, acquiring at least one of the following information of the vehicle passing through the detection section through the image acquisition device: license plate information, picture information, second time information and identification ID of the camera vehicle.
In an embodiment of the present invention, in a case where a vehicle in the target area is triggered to be captured by an image acquisition device and a radar, the method further includes: and matching the first time information and the second time information, and matching the identification ID of the millimeter wave radar vehicle and the identification ID of the camera vehicle to acquire a trigger snapshot record of the same vehicle.
Optionally, the step S102 may be implemented by the following technical solution: acquiring the vehicle density of the vehicles in the target area, comprising the following steps: acquiring the average speed of the vehicle in the target area; determining the vehicle density according to the average speed, wherein the vehicle density is determined to be higher than the first threshold value when the average speed is higher than a fourth threshold value; if the average speed is less than a fourth threshold and above a fifth threshold, determining that the vehicle is dense less than the first threshold and above a second threshold; determining that the vehicle density is less than the second threshold in a case where the average speed is less than a fifth threshold.
Therefore, the embodiment of the invention adopts the multi-working-mode capturing method based on radar detection, on one hand, the high capturing and high positioning capability of the radar detection under the non-congestion condition is fully utilized, the capturing rate, the recognition efficiency and the recognition accuracy of the system are improved, on the other hand, the capturing force and the recognition accuracy of the system are ensured under different road conditions through the recognition of the road congestion condition and the switching of different working modes of the camera, and the advantages of the millimeter wave radar detection and the advantages of the camera video detection are fully and effectively combined.
Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
In this embodiment, a triggering snapshot system of a vehicle is further provided, and the system is used to implement the foregoing embodiments and preferred embodiments, which have already been described and are not described again. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
Fig. 2 is a block diagram of a trigger snapshot system of a vehicle according to an embodiment of the present invention, including:
the vehicle speed detector 20 is used for acquiring the vehicle density of the vehicles in the target area and reporting the vehicle density to the controller;
the controller 22 is connected to the vehicle speed detector 20, and configured to send a working mode switching signal to the image acquisition device and/or the radar in the target area according to the vehicle density, where the working mode switching signal is used to instruct the image acquisition device and/or the radar to trigger and snapshot the vehicle in the target area in a working mode corresponding to the vehicle density, and when the vehicle density is higher than a first threshold, the vehicle in the target area is triggered and snapshot only through the image acquisition device.
According to the invention, the vehicle density of the vehicles in the target area is obtained; according to the vehicle intensity to image acquisition device and/or radar in the target area send working mode switching signal, wherein, working mode switching signal is used for instructing image acquisition device and/or radar adopt with the working mode that the vehicle intensity corresponds is right vehicle in the target area triggers the snapshot under the condition that the vehicle intensity is higher than first threshold value, only pass through image acquisition device is right vehicle in the target area triggers the snapshot, adopt above-mentioned technical scheme, solved among the relevant technology, under the high condition of the vehicle intensity of road, the radar is not high to the recognition accuracy and the recognition efficiency scheduling problem of vehicle, and then has improved the recognition accuracy and the recognition efficiency of vehicle.
In the embodiment of the present invention, the controller 22 is further configured to perform one of the following:
1) under the condition that the vehicle density is higher than the first threshold, triggering and capturing the vehicles in the target area only through the image acquisition device, wherein the triggering and capturing comprises the following steps: sending a first working mode switching signal to an image acquisition device in the target area according to the vehicle density so that the image acquisition device triggers and captures the vehicles in the target area;
2) under the condition that the vehicle density is smaller than the first threshold and higher than a second threshold, sending a second working mode switching signal to an image acquisition device and a radar in the target area according to the vehicle density so that the image acquisition device and the radar can trigger and capture the vehicle in the target area;
3) and under the condition that the vehicle density is smaller than the second threshold value, sending a third working mode switching signal to the radar in the target area according to the vehicle density so that the radar can trigger and capture the vehicle in the target area.
Fig. 3 is another block diagram of a trigger snapshot system of a vehicle according to an embodiment of the present invention, as shown in fig. 3, the system further includes: a radar 24 (which may be a millimeter wave radar) connected to the controller 22, configured to, when the vehicle in the target area is triggered to be captured by the radar, or when the vehicle in the target area is triggered to be captured by the image capture device and the radar, and when a preset detection section is detected to be triggered by the vehicle, obtain at least one of the following information that the vehicle passes through the detection section: the first time information, the vehicle head position information and the identification ID of the millimeter wave radar vehicle.
In an embodiment of the present invention, the system further includes: the image acquisition device 26 is connected to the controller 22, and is configured to, when the vehicle in the target area is triggered to be captured by the image acquisition device, or when the vehicle in the target area is triggered to be captured by the image acquisition device and a radar, and when a preset analog trigger line is detected to be triggered by the vehicle, acquire at least one of the following information that the vehicle passes through the detection cross section: license plate information, picture information, second time information and identification ID of the camera vehicle.
In the embodiment of the present invention, the controller 22 is further configured to receive, when the vehicle in the target area is triggered to be captured by the image acquisition device and the radar, at least one of the following information transmitted by the radar detector: the method comprises the following steps of firstly, time information, locomotive position information, identification ID of radar vehicles and at least one of the following information transmitted by the image acquisition device: license plate information, picture information, second time information and identification ID of the camera vehicle; and matching the first time information and the second time information, and matching the identification ID of the radar vehicle and the identification ID of the camera vehicle to acquire a trigger snapshot record of the same vehicle.
The triggering snapshot process of the vehicle is explained below with reference to a preferred embodiment, but is not limited to the above technical solution of the embodiment of the present invention.
The preferred embodiment of the invention specifically provides a multi-working-mode expressway capturing trigger snapshot system and method, which solve the problems of low capturing rate and low identification accuracy of a snapshot camera video stream on an expressway, low identification accuracy and identification efficiency of a radar on a vehicle under the condition of high vehicle density of a road and the like, and as an optional embodiment, the preferred embodiment of the invention has the following specific technical scheme:
setting a plurality of detection sections in the driving direction at certain intervals along the driving direction of a vehicle, setting a plurality of detection areas of millimeter wave radars in the driving direction, setting a plurality of analog video trigger lines in the lane scene of each camera, completing the identification of the uniform speed of road driving by a vehicle speed detector, switching the cameras into a radar-triggered camera snapshot working mode under the condition that the uniform speed of the road is high speed (the vehicle density degree is less than the second threshold value in the embodiment), completing the capture and trigger snapshot of the vehicle by only the millimeter wave radars, and switching the cameras into a radar-triggered + video-triggered hybrid working mode under the condition that the uniform speed of the road is medium speed (the vehicle density degree is less than the first threshold value and is higher than the second threshold value in the embodiment), the millimeter wave radar and the video jointly complete capturing and triggering snapshot of the vehicle, missing detection of the millimeter wave radar is prevented, the camera is switched into a video triggering working mode under the condition that the road uniform speed is low speed (equivalent to the condition that the density of the vehicle is higher than the first threshold value), capturing and triggering snapshot of the vehicle are completed only through the video, and missing detection and even false detection of the millimeter wave radar are prevented.
Fig. 4 is a block diagram of a snapshot recognition system according to a preferred embodiment of the present invention, as shown in fig. 4:
the snapshot recognition system according to the embodiment of the present invention is configured such that one high-definition recognition camera 40 (equivalent to the image acquisition device 26 of the above-described embodiment) is installed for each lane or each detection section (hereinafter, referred to as a section), two or more radars 42 (equivalent to the radars 24 of the above-described embodiment) are installed for each detection section, one vehicle speed detector 44 (equivalent to the vehicle speed detector 20 of the above-described embodiment) is installed for each detection section, a plurality of radars 42 and vehicle speed detectors 44 are connected to the same radar controller 46 (equivalent to the controller 22 of the above-described embodiment), the radar controller 46 is connected to a plurality of high-definition recognition cameras 40 in a 485 manner, and a plurality of high-definition recognition cameras 40 are connected to the same industrial personal computer 48 (it should be noted that the radar controller and the industrial personal computer may be integrated.
The radar controller 46 processes and receives the road speed condition detected by the speed detector 44 in real time, and sends a working mode switching signal according to the speed condition (specifically, the working mode may include a camera 485 address, a working mode (a radar trigger mode, a radar trigger + video trigger mode, a video trigger mode);
the radar controller 46 distinguishes the number of the vehicles in the detection area in real time and identifies the positions of the vehicles according to the information frames sent by the radar received in real time in a radar triggering operation mode and a hybrid operation mode, when the vehicle is detected to trigger the detection section, the millimeter wave radar controller 46 outputs triggering signals (a 485 address of the camera, an ID of the millimeter wave radar vehicle, triggering time and a license plate position) to the corresponding lane camera, the high-definition recognition camera 40 determines whether the camera responds to the triggering signals according to the 485 address of the camera after receiving the triggering signals, then matches the corresponding pictures according to the triggering time and the set threshold according to the license plate position, matches the recognized license plate in the picture according to the set threshold, and completes the matching of the ID of the camera vehicle (corresponding to the ID of the camera vehicle in the above embodiment) and the ID of the millimeter wave radar vehicle (corresponding to the ID of the radar vehicle in the above embodiment), if the vehicle identification data is not matched, area identification is carried out according to the position of the license plate according to a set threshold value, a vehicle tracking starting point is provided for the camera, pre-matching of the camera vehicle ID and the millimeter wave radar vehicle ID is completed, and finally a snapshot picture (at least comprising picture content, the camera vehicle ID, the millimeter wave radar vehicle ID, triggering time and triggering source (radar triggering)) and an identification result (at least comprising the license plate number, license plate color, the camera vehicle ID, the millimeter wave radar vehicle ID, triggering time and triggering source (radar triggering)) are output to the industrial personal computer 48;
the high-definition recognition camera 40 performs video stream recognition in a hybrid working mode and a video trigger working mode, and performs real-time tracking and recognition on a vehicle license plate in a scene of the camera in the lane, if a trigger signal from a radar is received in the real-time tracking process, matching and recognition output are performed according to a working process triggered by the radar output to the camera, and when the high-definition recognition camera detects that the vehicle reaches a video simulation trigger line, a snapshot (including picture content, camera vehicle ID, radar vehicle ID, trigger time, trigger source (video trigger)) and a recognition result (including license plate number, license plate color, camera vehicle ID, radar vehicle ID, trigger time, trigger source (video trigger)) are output to an industrial personal computer;
the industrial personal computer 48 receives the snapshot picture and the recognition result formed by triggering from the radar, and the snapshot picture and the recognition result formed by triggering from the camera video, and then completes matching between the snapshot picture and the license plate recognition result formed by the same triggering mode according to the radar vehicle ID and the triggering moment, and completes matching between the snapshot picture and the license plate recognition result formed by different triggering modes according to the camera vehicle ID and the radar vehicle ID, and finally forms a plurality of evidence obtaining records of one vehicle.
Based on the above general technical concept, the following embodiments also provide detailed technical solutions as follows:
it should be noted that the reference numerals of the following steps are not used to limit the execution order of the steps.
Step 1: the radar controller acquires the road speed condition detected by the speed detector 44 in real time and sends a working mode switching signal according to the road speed condition;
the switching signal includes: 485 addresses of cameras, work mode;
the working modes can be divided into a radar triggering mode, a video triggering mode and a mixed triggering mode;
the hybrid trigger mode is a radar trigger mode + a video trigger mode;
step 2: in a radar trigger mode or a hybrid trigger mode, a radar detects a vehicle and acquires first time information of the vehicle passing through a detection section, vehicle head position information and a radar vehicle ID;
in a video trigger mode or a mixed trigger mode, a high-definition recognition camera carries out video stream recognition, tracks and recognizes vehicles in a scene of the lane camera in real time, and acquires license plate information, picture information, second time information and camera vehicle IDs;
and step 3: determining a 485 address of a camera needing to be controlled to be captured according to the vehicle head position information, and forming trigger information;
the trigger information includes: a 485 camera address, a radar vehicle ID, a trigger time and a license plate position;
and 4, step 4: according to the 485 address of the camera in the trigger information, the corresponding camera responds to the trigger signal;
and 5: according to the triggering time in the triggering information, the camera matches the corresponding picture according to a set threshold;
step 6: according to the license plate position in the trigger information, the camera matches the license plate recognized in the image according to a set threshold value, and matching of the camera vehicle ID and the radar vehicle ID is completed; if the vehicle ID and the radar vehicle ID are not matched, performing area expansion identification according to the position of the license plate and a set threshold, providing a vehicle tracking identification starting point for the camera, and completing the pre-matching of the camera vehicle ID and the radar vehicle ID;
and 7: after the high-definition recognition camera responds to the radar trigger information, the high-definition recognition camera outputs snapshot picture information and license plate recognition information to the industrial personal computer;
the snapshot picture information includes: picture information, camera vehicle ID, radar vehicle ID, trigger time and trigger source;
the license plate identification information includes: license plate information, camera vehicle ID, radar vehicle ID, triggering time and triggering source;
and 8: when the high-definition recognition camera detects that the vehicle reaches a video trigger analog line, the high-definition recognition camera outputs snapshot picture information and license plate recognition information to the industrial personal computer;
the snapshot picture information includes: picture information, camera vehicle ID, radar vehicle ID, trigger time and trigger source;
the license plate identification information includes: license plate information, camera vehicle ID, radar vehicle ID, triggering time and triggering source;
and step 9: the industrial personal computer completes matching between the snapshot picture information formed in the same triggering mode and the license plate recognition result according to the radar vehicle ID and the triggering time as well as the camera vehicle ID and the triggering time to form a snapshot record;
step 10: matching different snapshot records of the same vehicle according to the radar vehicle ID and the camera vehicle ID to form a vehicle evidence obtaining record;
it should be noted that, in the preferred embodiment of the present invention, the number of lanes is not limited, the number of radars is two, but is not limited, and the number of video analog trigger lines is one, but is not limited.
In addition, the technical scheme of the embodiment and the preferred embodiment of the invention can utilize the high capture rate and the positioning accuracy of millimeter wave radar detection under the condition of high-speed smooth road, combine the video trigger function of the camera video stream to form three different working modes, and select the optimal working mode according to the condition of uniform road speed, thereby improving the capture rate, the vehicle identification efficiency and the license plate identification accuracy of the system under all weather conditions.
Further, after an optimal working mode is selected according to the road uniform speed condition, pictures and license plate recognition results are accurately found by utilizing the trigger information, the radar recognition vehicle and the camera recognition vehicle are bound, the unidentified pictures can be guided to carry out locking area secondary recognition, the camera is started to track and recognize the vehicle, the radar recognition vehicle and the camera recognition vehicle are pre-bound, finally, a vehicle can form a plurality of evidence obtaining records, and the vehicle capture rate, the vehicle recognition efficiency and the license plate recognition accuracy rate of all-weather full-speed sections are greatly improved.
Embodiments of the present invention also provide a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.
Alternatively, in the present embodiment, the storage medium may be configured to store a computer program for executing the steps of:
s1, acquiring the vehicle density of the vehicles in the target area;
and S2, sending a working mode switching signal to an image acquisition device and/or a radar in the target area according to the vehicle density, wherein the working mode switching signal is used for indicating the image acquisition device and/or the radar to trigger and snapshot the vehicle in the target area by adopting a working mode corresponding to the vehicle density, and under the condition that the vehicle density is higher than a first threshold value, triggering and snapshot the vehicle in the target area only through the image acquisition device.
Optionally, in this embodiment, the storage medium may include, but is not limited to: various media capable of storing computer programs, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.
Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.
Optionally, in this embodiment, the storage medium may include, but is not limited to: various media capable of storing program codes, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.
Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A triggering snapshot method of a vehicle, comprising:
acquiring the vehicle density of the vehicles in the target area through a vehicle speed detector;
sending a working mode switching signal to an image acquisition device and/or a radar in the target area according to the vehicle intensity, wherein the working mode switching signal is used for instructing the image acquisition device and/or the radar to trigger and snapshot the vehicle in the target area by adopting a working mode corresponding to the vehicle intensity, and only triggering and snapshot the vehicle in the target area through the image acquisition device under the condition that the vehicle intensity is higher than a first threshold value;
wherein, the sending of the working mode switching signal to the image acquisition device and/or the radar in the target area according to the vehicle density comprises: under the condition that the vehicle density is higher than the first threshold, triggering and capturing the vehicles in the target area only through the image acquisition device, wherein the triggering and capturing comprises the following steps: sending a first working mode switching signal to an image acquisition device in the target area according to the vehicle density so that the image acquisition device triggers and captures the vehicles in the target area; under the condition that the vehicle density is smaller than the first threshold and higher than a second threshold, sending a second working mode switching signal to an image acquisition device and a radar in the target area according to the vehicle density so that the image acquisition device and the radar can trigger and capture the vehicle in the target area; and under the condition that the vehicle density is smaller than the second threshold value, sending a third working mode switching signal to the radar in the target area according to the vehicle density so that the radar can trigger and capture the vehicle in the target area.
2. The method according to claim 1, wherein in case of a triggered snapshot of a vehicle within the target area by the radar, or in case of a triggered snapshot of a vehicle within the target area by an image acquisition device and a radar, the method further comprises:
when the vehicle is detected to trigger a preset detection section, acquiring at least one of the following information of the vehicle passing through the detection section through a radar: the first time information, the vehicle head position information and the identification ID of the millimeter wave radar vehicle.
3. The method according to claim 2, wherein in case of triggered snapping of vehicles within the target area by the image acquisition device or triggered snapping of vehicles within the target area by image acquisition device and radar, the method further comprises:
when the vehicle is detected to trigger a preset simulation trigger line, acquiring at least one of the following information of the vehicle passing through the simulation trigger line through the image acquisition device: license plate information, picture information, second time information and identification ID of the camera vehicle.
4. The method of claim 3, wherein in the event of a triggered snapshot of a vehicle within the target area by an image acquisition device and radar, the method further comprises:
and matching the first time information and the second time information, and matching the identification ID of the millimeter wave radar vehicle and the identification ID of the camera vehicle to acquire a trigger snapshot record of the same vehicle.
5. The method of any one of claims 1 to 4, wherein obtaining the vehicle density of the vehicles in the target area comprises:
acquiring the average speed of the vehicle in the target area;
determining the vehicle density according to the average speed, wherein the vehicle density is determined to be less than a second threshold value when the average speed is higher than a fourth threshold value; if the average speed is less than a fourth threshold and above a fifth threshold, determining that the vehicle is dense less than a first threshold and above the second threshold; determining that the vehicle is dense above the first threshold if the average speed is less than a fifth threshold.
6. A triggered snapshot system of a vehicle, comprising:
the vehicle speed detector is used for acquiring the vehicle density of the vehicles in the target area and reporting the vehicle density to the controller;
the controller is connected with the vehicle speed detector and is used for sending a working mode switching signal to an image acquisition device and/or a radar in the target area according to the vehicle density, wherein the working mode switching signal is used for indicating the image acquisition device and/or the radar to trigger and snapshot the vehicle in the target area by adopting a working mode corresponding to the vehicle density, and the vehicle in the target area is triggered and snapshot only through the image acquisition device under the condition that the vehicle density is higher than a first threshold value;
the controller is further configured to trigger snapshot of the vehicles in the target area only through the image capturing device if the vehicle density is higher than the first threshold, and includes: sending a first working mode switching signal to an image acquisition device in the target area according to the vehicle density so that the image acquisition device triggers and captures the vehicles in the target area; under the condition that the vehicle density is smaller than the first threshold and higher than a second threshold, sending a second working mode switching signal to an image acquisition device and a radar in the target area according to the vehicle density so that the image acquisition device and the radar can trigger and capture the vehicle in the target area; and under the condition that the vehicle density is smaller than the second threshold value, sending a third working mode switching signal to the radar in the target area according to the vehicle density so that the radar can trigger and capture the vehicle in the target area.
7. The system of claim 6, further comprising: the radar is connected with the controller and used for acquiring at least one of the following information when the vehicle is detected to trigger a preset detection section under the condition that the vehicle in the target area is triggered and captured by the radar or the vehicle in the target area is triggered and captured by the image acquisition device and the radar: the first time information, the vehicle head position information and the identification ID of the millimeter wave radar vehicle.
8. The system of claim 6, further comprising: the image acquisition device is connected with the controller and used for acquiring at least one of the following information when the vehicle is detected to trigger a preset simulation trigger line under the condition that the vehicle in the target area is triggered and captured by the image acquisition device or the vehicle in the target area is triggered and captured by the image acquisition device and a radar: license plate information, picture information, second time information and identification ID of the camera vehicle.
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| CN111127898B (en) * | 2019-12-27 | 2021-07-13 | 北京万集科技股份有限公司 | Method and device for switching trigger modes |
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