CN103903440B - A kind of electric police grasp shoot method and device - Google Patents

Abstract

The present invention discloses a kind of electric police grasp shoot method and device, first the method receives the candid photograph information with triggering signal coding that front shooting camera and rear shooting camera send, and triggering signal coding is that induction installation senses that vehicle is through coding corresponding to the out-of-date triggering signal sent; And search one group of candid photograph information with same trigger signal coding of front shooting camera and the candid photograph of rear shooting camera; Capture information by find one group to synthesize, generate violation information for follow-up process violating the regulations. The present invention discloses the device of corresponding the method, this device comprises receiver module, inquiry module and synthesis module. The method of the present invention and device can set up the corresponding relation grabbing fearness information before and after illegal vehicle accurately, in violation information, provide the capture pictures before and after vehicle simultaneously, it is convenient to when process violating the regulations, it can be seen that driver's looks violating the regulations at that time, is conducive to strengthening management of traffic order.

Description

An electronic police capture method and device

technical field

The invention belongs to the technical field of road monitoring, in particular to an electronic police capture method and device.

Background technique

As an effective means of modern road traffic safety management, the "electronic police" in the road traffic management system can quickly monitor, capture, and deal with traffic violations, quickly obtain evidence of violations, and provide effective monitoring methods, which will help improve urban traffic congestion. The phenomenon has played an important role and has become an indispensable and important member of the road traffic management team, fully exerting its accurate and fair law enforcement role.

A typical "electronic police" is usually composed of vehicle sensing, shooting, collection, processing, transmission and management, as well as auxiliary light sources, auxiliary brackets and related supporting equipment. It is also called a violation capture system. A commonly used method is to bury induction coils (ground sense) underground, and set video cameras on crossbars erected in the road to capture illegal vehicles. Generally, the captured image can clearly display information such as signal light status, stop line position, illegal lane, license plate number, license plate color, body color, vehicle type, violation time, location, vehicle speed and driving direction. All the captured data are sent back to the traffic police data center through the network for processing. Through this information, connect with the vehicle management warehouse in the corresponding area, analyze and obtain whether the current vehicle is a legal vehicle; at the same time, generate an illegal image and speed information database, and the data has the function of online query. The violation capture system is widely used in urban crossroads, sidewalk crossings, time-limited roads, main and auxiliary road entrances and exits, bus lanes, etc. It is used for effective evidence collection for violations such as running a red light. It can provide information for public security departments to effectively combat speeding, theft, blacklisted motor vehicle crimes, investigate traffic hit-and-run cases, analyze traffic conditions, strengthen public security management and other illegal acts, and provide important clues for local public security and traffic police departments to conduct traffic management and basis.

But the existing capture system has a common shortcoming, that is, the capture system of the prior art can only be photographed afterward, that is to say, the information of the vehicle can only be photographed from the rear side of the vehicle, such as license plate, vehicle body information, etc. However, in processing When punishing violations, because the electronic police did not photograph the violating driver at that time, many violators borrowed other people's driver's licenses to punish, which is not conducive to traffic management.

Contents of the invention

The purpose of the present invention is to provide an electronic police capture method and its device, which can record violators' information from multiple angles and solve the problem that the prior art cannot identify violators.

In order to realize the above-mentioned purpose, the technical scheme of the present invention is as follows:

An electronic police capture method, applied to an analysis server in an electronic police capture system comprising a sensing device, a front-end device and an analysis server, the front-end device comprising a front camera for capturing a front of a vehicle and a vehicle for A rear camera for snapping at the rear, and a sensing device for sensing the vehicle passing by and sending a trigger signal to trigger the front and rear cameras to trigger the snapping is arranged between the front camera and the rear camera. The method includes the following steps:

Step 1. Receive the snapshot information sent by the front camera and the rear camera with a trigger signal code, the trigger signal code is the code corresponding to the trigger signal sent by the sensing device when the vehicle passes by;

Step 2, searching for a group of capture information captured by the front camera and the rear camera with the same trigger signal code;

Step 3: Combining the found group of snapshot information to generate violation information.

In one implementation of the present invention, the front camera and the rear camera linked with the same sensing device are bound into a capture group, and the step 2 specifically includes the following steps:

Extracting the capture information Rec1 sent by the front camera or the rear camera;

Find the capture information Rec2 having the same trigger signal code as the capture information Rec1 in the capture information sent by the rear camera or the front camera in the same capture group as the front camera or the rear camera.

In another implementation of the present invention, the front camera linked with the same sensing device and the rear camera are bound into a capture group, if the rear camera corresponds to at least one capture group, each capture group corresponds to a For the front camera, the step 2 includes the following steps:

Extract the capture information Rec1 sent by the front camera, and search for the capture information Rec2 having the same trigger signal code as the capture information Rec1 in the capture information sent by the rear camera in the same capture group as the front camera ;

Or, extract the capture information Rec1 sent by the rear camera, and find the capture information that has the same trigger signal code as the capture information Rec1 in the capture information sent by the front camera in all the capture groups corresponding to the rear camera Information Rec2.

Correspondingly, if the front camera corresponds to at least one capture group, and each capture group corresponds to a rear camera, the step 2 includes the following steps:

Extract the capture information Rec1 sent by the rear camera, and search for the capture information Rec2 that has the same trigger signal code as the capture information Rec1 in the capture information sent by the front camera in the same capture group as the rear camera ;

Or, extract the capture information Rec1 sent by the front camera, and find a capture with the same trigger signal code as the capture information Rec1 in the capture information sent by the rear cameras in all the capture groups corresponding to the front camera Information Rec2.

This step is applicable to the situation where one front-end device is shared when there are multiple lanes, for example, searching for corresponding capture information when one rear camera for rear shooting corresponds to multiple front cameras for front shooting.

Further, the capture time of the capture information Rec1 and the capture information Rec2 are the same, or the capture time is in the same time range. In the case that the search conditions of the capture time and the trigger signal code are satisfied at the same time, the corresponding relationship between the found set of capture information Rec1 and capture information Rec2 is not easy to make mistakes.

The snapping information of the present invention includes snapping photos, snapping points, equipment codes, snapping time, license plate numbers and trigger signal codes; the violation information includes snapping photos in the snapping information Rec1, and snapping photos in the snapping information Rec2, The front image of the vehicle captured by the front camera, especially the close-up of the driver, is synthesized with the snapshot captured by the rear camera. Different from the snap photos of the back of the car taken by only one front-end device in the prior art, the face of the violator cannot be recognized, so that the violator has no chance to punish the violator, which is beneficial to traffic management.

The present invention also proposes an electronic police capture device, which is applied to an analysis server in an electronic police capture system including a sensing device, a front-end device and an analysis server, and the front-end device includes a front camera for capturing the front of the vehicle The camera and the rear camera for capturing the rear of the vehicle, and a sensing device for sensing the passing of the vehicle and sending a trigger signal to trigger the front and rear camera captures is arranged between the front camera and the rear camera, The unit includes:

The receiving module is used to receive the snapshot information with the trigger signal code sent by the front camera and the rear camera, and the trigger signal code is the code corresponding to the trigger signal sent by the sensing device when the vehicle passes by;

A query module, configured to search for a group of capture information captured by the front camera and the rear camera with the same trigger signal encoding;

The synthesizing module is used for synthesizing the found group of snapshot information to generate violation information.

In one implementation of the present invention, the front-shooting camera and the rear-shooting camera linked with the same sensing device are bound into a capture group,

The query module performs the following operations when searching for a group of capture information captured by the front camera and the rear camera with the same trigger signal code:

Extracting the capture information Rec1 sent by the front camera or the rear camera;

Find the capture information Rec2 having the same trigger signal code as the capture information Rec1 in the capture information sent by the rear camera or the front camera in the same capture group as the front camera or the rear camera.

In another implementation of the present invention, the front camera linked with the same sensing device and the rear camera are bound into a capture group, if the rear camera corresponds to at least one capture group, each capture group corresponds to a For the front camera, the query module performs the following operations when searching for a group of capture information captured by the front camera and the rear camera with the same trigger signal code:

Extract the capture information Rec1 sent by the front camera, and search for the capture information Rec2 having the same trigger signal code as the capture information Rec1 in the capture information sent by the rear camera in the same capture group as the front camera ;

Or, extract the capture information Rec1 sent by the rear camera, and find the capture information that has the same trigger signal code as the capture information Rec1 in the capture information sent by the front camera in all the capture groups corresponding to the rear camera Information Rec2.

Correspondingly, if the front camera corresponds to at least one capture group, and each capture group corresponds to a rear camera, the query module searches for the same trigger signal code captured by the front camera and the rear camera. When capturing a group of information, perform the following operations:

Extract the capture information Rec1 sent by the rear camera, and search for the capture information Rec2 that has the same trigger signal code as the capture information Rec1 in the capture information sent by the front camera in the same capture group as the rear camera ;

Or, extract the capture information Rec1 sent by the front camera, and find a capture with the same trigger signal code as the capture information Rec1 in the capture information sent by the rear cameras in all the capture groups corresponding to the front camera Information Rec2.

The sensing device is a ground sensor, and may also be an ultrasonic sensor, a radar, or a video sensing device.

An electronic police capture method and device proposed by the present invention are linked with the trigger signal of the ground sense through the front camera and the rear camera arranged before and after the ground sense, and the front camera linked with the same sensing device is tied to the rear camera. It is defined as a capture group, and the illegal information with close-ups of the front is formed by synthesizing the captured photos of the illegal vehicles before and after. At the same time, because the angle, position, and speed of each vehicle passing through the ground sense are different, when different vehicles pass through the ground sense, the corresponding trigger signals are also different. The present invention encodes the trigger signal according to the difference of the ground sense trigger signal, and puts in the snapshot information, and can accurately find out the corresponding snapshot information captured by a capture group for an illegal vehicle, thereby synthesizing it into violation information. Since the violation information includes the face photo of the violator, when the violation is handled, the relevant department can see the face of the violating driver at that time, so as to avoid the problems encountered by the existing electric police capture, so that the violator has no chance to borrow other people's driving To deal with violations, so as to constrain the violations of the violators and facilitate the strengthening of traffic order management.

Description of drawings

Fig. 1 is a schematic diagram of the network structure of the electronic police capture system according to the embodiment of the present invention;

Fig. 2 is the flowchart of electronic police capture method of the present invention;

Fig. 3 is a structural schematic diagram of the electronic police capture device of the present invention.

detailed description

The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments, and the following embodiments do not constitute a limitation of the present invention.

The embodiment of the present invention is described through the network structure of the electronic police capture system as shown in Figure 1. The electronic police capture system includes induction devices deployed on the lane, and are respectively arranged in front of and behind the induction device along the driving direction of the vehicle on the lane. Camera and post camera, and analysis server. The front camera is used to capture the front of the vehicle, and the rear camera is used to capture the rear of the vehicle. Both the front camera and the rear camera are configured to be linked with the sensing device, and the front camera and the rear camera linked to the same sensing device are bound to form a capture group. In the existing technology, the license plate information recognized by the front and rear cameras is mainly used to match the captured information, but this method is prone to errors in license plate recognition in bad weather such as heavy fog and heavy rain (the error rate is generally around 1%-2%) , Such an error will cause the front and rear capture information to fail to match normally, and the illegal vehicle cannot be caught. However, in the present invention, the trigger signal code sent out when the sensing device is linked and triggered matches the snapshot information of the front and rear cameras. Due to the uniqueness of the trigger signal code, the front and rear capture information can be accurately matched, and there is no risk of recognition error, which is higher than the existing technology.

The electronic police capture system also includes an analysis server. The front camera and the rear camera process the captured vehicle images to form capture information and send it to the analysis server. The analysis server processes the received capture information to form violation information storage.

In this embodiment, the sensing device is a ground sensor, buried underground in the driveway, and sends out a trigger signal through induction when a vehicle passes by. The present invention is not limited to what kind of sensing device is used, and the sensing device that can be used can also be an ultrasonic sensor, a radar, or a video sensing device. Loop sensors are commonly used in ground sensing. Loop sensors detect metal objects (such as passing vehicles) by detecting changes in the inductance of metal objects on the induction coil. The loop inductor coil is made of multiple turns of wire, buried under the road surface and filled with cement. When a metal object passes through the induction coil, the inductance of the conductor coil changes. This change is detected by the loop sensor, and it is judged that there is a metal object through the operation of the internal intelligent controller, and it is further encoded into a digital value by the processor. , which is the trigger signal. Since the angle, position, and speed of each vehicle passing through the loop sensor are different, the corresponding trigger signals of different vehicles passing through the loop sensor are also different. Depending on the ground sense, the trigger signal may be a number or a special variation. The rear camera and the front camera can be effectively bound together by associating the same sense of ground. In addition to the loop sensor, other ground senses can also generate trigger signals, which will not be listed here.

The front camera is deployed in front of the ground sense, or on the side of the lane in front of the ground sense, or above the driving lane where the ground sense is located. Both the front camera and the rear camera are configured to be linked with the ground sense. When the ground sense senses that a vehicle passes by, a trigger signal is sent to trigger the linkage of the front camera and the rear camera to take a snapshot. Both the front camera and the rear camera are configured to be linked with the ground sense, including the following two embodiments:

Embodiment 1: A single front camera corresponds to a single rear camera.

This embodiment is applicable to the intersection of a one-way road with a ground sense, and a front camera FrontIPC2 and a rear camera RearIPC1 are respectively arranged before and after the road where the ground sense is located. In this case, configure FrontIPC2 and RearIPC1 to be linked with the ground sensor, and FrontIPC2 and RearIPC1 are linked with the same ground sensor and bound as a capture group.

Embodiment 2: One rear camera corresponds to multiple front cameras.

This embodiment is applicable to a multi-lane intersection where each lane is equipped with ground sense. For example, for a one-way three-lane intersection, a ground sense is set for each lane, which are respectively ground sense 1, ground sense 2 and ground sense 3. Only one rear camera RearIPC1 is installed behind the three ground senses, and one front camera is installed in front of each lane ground sense, corresponding to the three lanes are FrontIPC2, FrontIPC3, and FrontIPC4. At this time, set the linkage between ground sense 1 and RearIPC1 and FrontIPC2, the linkage between ground sense 2 and RearIPC1 and FrontIPC3, and the linkage between ground sense 3 and RearIPC1 and FrontIPC4. RearIPC1 and FrontIPC2 are linked with the same ground sense 1 and are bound as a capture group; RearIPC1 and FrontIPC3 are linked with the same ground sense 2 and are bound as a capture group; RearIPC1 and FrontIPC4 are linked with the same ground sense 3 and are linked Bind as a capture group. It is easy to understand that the situation of one front camera corresponding to multiple rear cameras is so similar, so I won't go into details here.

It should be noted that the front-end equipment is usually a video surveillance camera or other image acquisition equipment. Considering that the front-facing camera needs to capture images in front of the vehicle, which is closer to the vehicle being photographed, a wide-angle lens is required so that the vehicle can be covered during the capture.

Fig. 2 shows the flow process of electronic police capture method of the present invention, is applied to analysis server, comprises the following steps:

Step 201: Receive the snapshot information sent by the front camera and the rear camera with the code of the trigger signal, the code of the trigger signal is the code corresponding to the trigger signal sent by the sensing device when the vehicle passes by.

When the local sensor detects the passing of a vehicle, a trigger signal is sent to trigger the linked front camera and rear camera to take a snapshot. The front camera and the rear camera respectively analyze and process the captured image to obtain the passing information, encode the trigger signal, package the trigger signal encoding and the analyzed passing information together as the captured information and send it to the analysis server through the network.

The capture information includes capture photos, capture points, equipment codes, capture time, license plate numbers and trigger signal codes. The code of the trigger signal is the code corresponding to the trigger signal sent when the sensing device senses the passing of the vehicle. The analysis server receives the capture information sent by the front camera and the rear camera, and stores the capture information separately. Specifically, it stores the capture point, equipment code, capture time, license plate number, and trigger signal code into the database of the analysis server. Save the snapped photo to the storage device.

Step 202: Find a group of snapshot information captured by the front camera and the rear camera with the same trigger signal code.

The analysis server configures the front camera and the rear camera with the same trigger signal source (ie ground sense) as a capture group. For embodiment one, a single front camera corresponds to a single rear camera, then the front camera FrontIPC2 and the rear camera RearIPC1 are bound as a capture group; for embodiment two, for different lanes, according to the trigger signal source ground sense 1 will Bind RearIPC1 and FrontIPC2 into a capture group, bind RearIPC1 and FrontIPC3 into another capture group according to the trigger signal source Sense 2, and bind RearIPC1 and FrontIPC4 into a capture group according to the trigger signal source Sense 3. By establishing a capture group, the front and rear capture information of an illegal vehicle can be directly searched in the capture information sent by the capture camera corresponding to the capture group, and the search method is more effective.

After the analysis server receives the snapshot information collected by the front-end equipment, if the vehicle is determined to be illegal, it needs to extract and synthesize the snapshot information to form a violation information and store it in the database for illegal processing. In this embodiment, after the front camera and the rear camera upload the collected snapshot information to the analysis server, the analysis server needs to find out the snapshot information corresponding to illegal vehicles.

For the situation of embodiment one, the analysis server first extracts the capture information Rec1 sent by the front camera, and searches the database for the same capture time and the same trigger signal code in the capture information sent by the rear camera of the same capture group as the front camera. information, assuming that the retrieved snapshot information is Rec2, then Rec2 is the corresponding snapshot information of Rec1. In the same way, it is also possible to first extract the snapshot information sent by the post-camera as Rec1, and search the database for the snapshot information sent by the front-camera in the same capture group as the post-camera with the same capture time and the same trigger signal code, assuming The found snapshot information is Rec2, and Rec2 is the corresponding snapshot information of Rec1.

For the case of Embodiment 2, since the rear camera corresponds to multiple front cameras, there is more than one capture group corresponding to the rear camera. At this time, the capture information sent by the front camera is first extracted as Rec1, which is more convenient to find its corresponding Capture information. Therefore, first extract the capture information sent by the front camera as Rec1, and search the database for the capture information sent by the rear camera in the same capture group as the front camera with the same capture time and the same trigger signal code. The information is Rec2, and Rec2 is the corresponding snapshot information of Rec1. For example, if the capture information Rec1 of the FrontIPC2 is extracted, the capture information Rec2 with the same capture time and the same trigger signal encoding as the capture information Rec1 is found in the capture information sent by the RearIPC1 of the same capture group.

The capture information Rec1 sent by the rear camera can also be extracted first. Since the rear camera corresponds to multiple capture groups, it is necessary to find the corresponding capture information Rec1 in the capture information sent by the front camera in all the capture groups corresponding to the rear camera. Captured information Rec2. For example, to extract the capture information Rec1 of RearIPC1, it is necessary to find the capture information Rec2 with the same capture time and the same trigger signal code as the capture information Rec1 in the capture information sent by FrontIPC2, FrontIPC3, and FrontIPC4.

Through the two query conditions of capture time and trigger signal code, it is possible to more accurately determine the corresponding relationship between the front and back capture information of an illegal vehicle.

It should be noted that if the time of each front-end device is not strictly synchronized, the range of the same capture time can be appropriately enlarged when searching. For example, when searching for the capture information of the rear camera in the database, the capture time can be the first capture time of the front-end device. Within the range of 1 second before and after the time. At the same time, the situation that one front camera corresponds to multiple rear cameras is so similar, so it will not be repeated here.

Step 203: Synthesize the found group of snapshot information to generate violation information.

Specifically, in the prior art, only the snapshot information captured by the rear camera is used as the violation information, but in this embodiment, a front close-up photo captured by the front camera is superimposed on the basis of the violation information captured by the subsequent camera. That is, according to the found Rec1 and Rec2, based on one of the captured information such as Rec1, the captured photo in the other captured information Rec2 is extracted, and synthesized in the captured photo of Rec1 as the violation information. The analysis server can directly write the synthesized photo into Rec1 or Rec2, and use Rec1 or Rec2 as violation information, or generate a new violation information Rec3 separately.

An electronic police capture device proposed in this embodiment, as shown in Figure 3, is applied to an analysis server in an electronic police capture system including a sensing device, a front-end device and an analysis server. The front camera and the rear camera used to capture the rear of the vehicle, and a sensing device for sensing the passing of the vehicle and sending a trigger signal to trigger the front and rear camera captures is set between the front camera and the rear camera. The unit includes:

The receiving module is used to receive the capture information with the trigger signal code sent by the front camera and the rear camera, and the trigger signal code is the code corresponding to the trigger signal sent when the sensing device senses the passing of the vehicle;

The query module is used to search for a group of capture information captured by the front camera and the rear camera with the same trigger signal encoding;

The synthesizing module is used for synthesizing the found group of snapshot information to generate violation information.

In this embodiment, the front camera and the rear camera linked with the same sensing device are bound into a capture group, and when the query module searches for a group of capture information captured by the front camera and the rear camera with the same trigger signal code, Do the following:

Extract the capture information Rec1 sent by the front camera or the rear camera;

Find the capture information Rec2 having the same trigger signal code as the capture information Rec1 in the capture information sent by the rear camera or the front camera in the same capture group as the front camera or the rear camera.

For the situation of Embodiment 2, if the post-camera corresponds to at least one capture group, and each capture group corresponds to a front-camera, then the query module searches for a camera with the same trigger signal code captured by the pre-camera and the post-camera. When group capture information, perform the following operations:

Extract the capture information Rec1 sent by the front camera, and search for the capture information Rec2 having the same trigger signal code as the capture information Rec1 in the capture information sent by the rear camera in the same capture group as the front camera;

Or, extract the capture information Rec1 sent by the rear camera, and find the capture information Rec2 having the same trigger signal code as the capture information Rec1 in the capture information sent by the front camera in all the capture groups corresponding to the rear camera.

Correspondingly, if the front camera corresponds to at least one capture group, and each capture group corresponds to a rear camera, then the query module searches for a group of capture information captured by the front camera and the rear camera with the same trigger signal code , the operations performed are similar to the above steps, and will not be repeated here.

Therefore, by synthesizing the found snapshot information Rec2 and snapshot information Rec1 to generate violation information, the generated violation information includes front and rear snapshot photos, which provides convenience for illegal processing.

The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and changes according to the present invention. deformation, but these corresponding changes and deformations should belong to the scope of protection of the appended claims of the present invention.

Claims (4)

1. An electronic police capture method, applied to an analysis server in an electronic police capture system comprising a sensing device, a front-end device and an analysis server, wherein the front-end device includes a front-end device for capturing a picture of the vehicle front The camera and the rear camera for capturing the rear of the vehicle, and a sensing device for sensing the passing of the vehicle and sending a trigger signal to trigger the front and rear camera captures is arranged between the front camera and the rear camera, The method includes the following steps: Step 1. Receive the snapshot information sent by the front camera and the rear camera with a trigger signal code, the trigger signal code is the code corresponding to the trigger signal sent by the sensing device when the vehicle passes by; Step 2, searching for a group of capture information captured by the front camera and the rear camera with the same trigger signal code; Step 3, synthesizing the found group of snapshot information to generate violation information; Further, the front camera linked with the same sensing device and the rear camera are bound as a capture group, and the step 2 specifically includes the following steps: Extracting the capture information Rec1 sent by the front camera or the rear camera; Find the capture information Rec2 having the same trigger signal code as the capture information Rec1 in the capture information sent by the rear camera or the front camera in the same capture group as the front camera or the rear camera; Or bind the front camera and the rear camera linked with the same sensing device into a capture group, the rear camera corresponds to at least one capture group, and each capture group corresponds to a front camera, and the step 2 includes Follow the steps below: Extract the capture information Rec1 sent by the front camera, and search for the capture information Rec2 having the same trigger signal code as the capture information Rec1 in the capture information sent by the rear camera in the same capture group as the front camera ; Or, extract the capture information Rec1 sent by the rear camera, and find the capture information that has the same trigger signal code as the capture information Rec1 in the capture information sent by the front camera in all the capture groups corresponding to the rear camera message Rec2; Or bind the front camera and the rear camera linked with the same sensing device into a capture group, the front camera corresponds to at least one capture group, and each capture group corresponds to a rear camera, and the step 2 includes Follow the steps below: Extract the capture information Rec1 sent by the rear camera, and search for the capture information Rec2 that has the same trigger signal code as the capture information Rec1 in the capture information sent by the front camera in the same capture group as the rear camera ; Or, extract the capture information Rec1 sent by the front camera, and find a capture with the same trigger signal code as the capture information Rec1 in the capture information sent by the rear cameras in all the capture groups corresponding to the front camera Information Rec2. 2. The electronic police capture method according to claim 1, wherein the capture time of the capture information Rec1 and the capture information Rec2 is the same, or the capture time is in the same time range. 3. An electronic police capture device, applied to an analysis server in an electronic police capture system comprising a sensing device, a front-end device and an analysis server, wherein the front-end device includes a front-end device for capturing a picture of the front of the vehicle The camera and the rear camera for capturing the rear of the vehicle, and a sensing device for sensing the passing of the vehicle and sending a trigger signal to trigger the front and rear camera captures is arranged between the front camera and the rear camera, The unit includes: The receiving module is used to receive the snapshot information with the trigger signal code sent by the front camera and the rear camera, and the trigger signal code is the code corresponding to the trigger signal sent by the sensing device when the vehicle passes by; A query module, configured to search for a group of capture information captured by the front camera and the rear camera with the same trigger signal encoding; Synthesizing module, used for synthesizing the group of snapshot information found by the search, to generate violation information; Further, the front camera linked with the same sensing device and the rear camera are bound as a capture group, and the query module searches for a group of captures captured by the front camera and the rear camera with the same trigger signal code information, do the following: Extracting the capture information Rec1 sent by the front camera or the rear camera; Find the capture information Rec2 having the same trigger signal code as the capture information Rec1 in the capture information sent by the rear camera or the front camera in the same capture group as the front camera or the rear camera; Or bind the front camera and the rear camera linked with the same sensing device into a capture group, the rear camera corresponds to at least one capture group, and each capture group corresponds to a front camera, and the query module is in When searching for a group of capture information with the same trigger signal code captured by the front camera and the rear camera, the following operations are performed: Extract the capture information Rec1 sent by the front camera, and search for the capture information Rec2 having the same trigger signal code as the capture information Rec1 in the capture information sent by the rear camera in the same capture group as the front camera ; Or, extract the capture information Rec1 sent by the rear camera, and find the capture information that has the same trigger signal code as the capture information Rec1 in the capture information sent by the front camera in all the capture groups corresponding to the rear camera message Rec2; Or bind the front camera and the rear camera linked with the same sensing device into a capture group, the front camera corresponds to at least one capture group, and each capture group corresponds to a rear camera, and the query module is in When searching for a group of capture information with the same trigger signal code captured by the front camera and the rear camera, the following operations are performed: Extract the capture information Rec1 sent by the rear camera, and search for the capture information Rec2 that has the same trigger signal code as the capture information Rec1 in the capture information sent by the front camera in the same capture group as the rear camera ; Or, extract the capture information Rec1 sent by the front camera, and find a capture with the same trigger signal code as the capture information Rec1 in the capture information sent by the rear cameras in all the capture groups corresponding to the front camera Information Rec2. 4. An electronic police capture device according to claim 3, wherein the capture time of the capture information Rec1 and the capture information Rec2 is the same, or the capture time is in the same time range.