CN101430827B - Taxi wireless video monitoring system and method based on GPS - Google Patents

Abstract

The invention discloses a GPS-based wireless video monitoring system for a taxi and a monitoring method which are used for recognizing various illegal taxis, in particular to fake-license taxis. The monitoring system comprises a video information acquisition site, a wireless transmission system, a monitoring center and a GPS receiver. The monitoring method comprises the following steps: an existing vehicle recognition system is combined with GPS; a license plate at the acquisition site is compared with information in a database; if the comparison result matches, position information of two taxis with the same license plate is compared with each other by a message sent by a satellite; and if the comparison result is different, the taxi at the acquisition site is proved to be the fake-license taxi, and if the comparison result is the same, the taxi is proved to be a legal taxi, so that the fake-license taxi is accurately recognized. The invention has the beneficial effects that the monitoring system and the monitoring method can rapidly and accurately recognize fake-license taxis and various illegal vehicles.

Description

Taxi wireless video monitoring system and method based on GPS

technical field

The invention relates to the technical field of video monitoring of taxis, in particular to a GPS-based wireless monitoring system for taxis.

Background technique

The development of the economy and the improvement of people's living standards have created favorable conditions for the development of the taxi industry. The number of urban taxis has grown rapidly, and more and more illegal taxis have emerged, such as operating without a license, fake licenses, Fake license plates, etc. These illegal activities of fake license plates and fake license plates are becoming more and more rampant, and many real car owners have been blamed for no reason. Some vehicle identification systems on the market compare the collected license plate information with the data of the monitoring center, and then analyze and process it. But the plate car does not work, because the license plate feature of the set plate car is identical with that license plate feature of real legality, so this system cannot identify the set plate car in time and accurately. This makes deck taxis rampant day by day, which greatly harms the interests of real car owners.

Contents of the invention

In order to solve the phenomenon of false license plates, the present invention provides a GPS-based wireless video monitoring method for taxis. This method combines the existing vehicle identification system with the GPS positioning system, because every legal taxi is equipped with GPS The receiving terminal, so when the license plate of the collection point matches the information in the database, the information sent by the satellite can be used to compare the location information of two taxis with the same license plate. If the comparison results are not the same, it means that the taxi at the collection point The car is a set car, and the same description is a legal taxi, so that the set taxi can be accurately identified. In particular, the GPS vehicle monitoring system adopts the world's leading GPS global satellite positioning technology, GSM global mobile communication technology, GIS geographic information processing technology, large-capacity data acquisition technology and large-capacity data storage and other computer network communication and data processing technologies. At the same time, collect and record a large amount of data information during the driving process of the vehicle as much as possible, automatically generate graphics and data, and perform statistics, comparisons, analyzes and lists to achieve precise positioning, tracking and control of moving targets such as vehicles and ships. It has the characteristics of high positioning accuracy, strong stability and good use effect. Therefore, this system based on GPS is not only conducive to the unified dispatch of taxis, but also provides reliable location data for us to identify licensed vehicles in time.

In order to achieve the above object, the technical scheme of the present invention is as follows:

A GPS-based wireless video monitoring system for taxis, including: a video information collection point, a wireless transmission system, a monitoring center and a GPS receiver. The video information collection point mainly includes a camera and a first video codec, and the camera is responsible for photographing passing The taxi converts the collected video analog signals into digital signals through the first video codec, and sends them to the monitoring center through the wireless network card built in the first video codec through the wireless transmission system; the wireless transmission system is responsible for converting each video The information of the information collection point is sent to the monitoring center, and the information after the license plate recognition by the monitoring center is sent to each sub-monitoring point; the monitoring center includes a second video codec and a monitoring computer, and after receiving the digital video signal of the collection point Finally, the second video codec converts it into a visual analog signal, and captures the license plate number of the taxi, so as to identify and compare it with the positioning information of the GPS, and send the analysis results to the traffic police of each main road. Sub-monitoring point; the GPS receiver installed on each legal taxi calculates the current position of the vehicle according to the received satellite information, and the on-board communication controller extracts the required position, speed and The time information is combined with information such as vehicle identity to form data packets, and then sent to the monitoring center through the wireless transmission system; the monitoring computer also includes a database, wireless network card, video capture card and electronic map, and stores all legal taxis in the database. The location of legal taxis can be monitored in real time based on satellite data.

A GPS-based taxi wireless video surveillance method, comprising the steps:

a. Start the monitoring computer and input the management personnel information;

b. The monitoring computer generates a wireless network connection request, and connects to the video codec of the video collection point through the wireless transmission system;

c. The video collection point collects information, and converts the video signal into a digital signal and transmits it to the monitoring center through the video codec. At the same time, the legal taxi calculates the information sent by the satellite, and then transmits the location information to the monitoring center;

d. After the monitoring computer receives the data from the collection point and the satellite data, it recognizes the license plate;

e. The monitoring center transmits the recognition results to the sub-monitoring points near the collection point, so that relevant departments can intercept illegal vehicles such as license plates.

The above method also includes the step of the monitoring center giving an alarm prompt to the identified vehicle with a license plate.

The beneficial effects of the present invention are: the monitoring system and method of the present invention transmit the data sent by each video collection point and satellite to the monitoring center through the wireless transmission system, and then quickly and accurately identify the licensed taxis and various illegal vehicles, It is of great help to urban vehicle management.

Description of drawings

Fig. 1 is the structural block diagram of the taxi wireless video monitoring system based on GPS of the present invention.

Fig. 2 is a schematic structural diagram of the video information collection point module of the present invention.

Fig. 3 is a schematic structural diagram of the monitoring center module of the present invention.

Fig. 4 is a flow chart of the GPS-based wireless video monitoring method for taxis of the present invention.

Detailed ways

As shown in Fig. 1 to Fig. 3, the taxi wireless video surveillance system based on GPS of the present invention comprises video information collection point 1, wireless transmission system 2, satellite 3, taxi car GPS receiver 4, monitoring center 5 and sub-monitoring point 6 . The video information collection point 1 is connected to the wireless transmission system 2 through a wireless network card, and sends the collected and converted digital signal to the monitoring center 5 after receiving the data sending request from the monitoring computer 10 . At the same time, the satellite 3 transmits information to the GPS receiver 4 on the legal taxi. After the GPS receiver 4 receives the data, it quickly extracts the required position, speed and time information through the vehicle communication controller, and combines the vehicle identity and other information to form a The data packet is sent to the monitoring computer 10 through the wireless transmission system 2, and the monitoring center 5 stores the video data of the received video information collection point 1 and the satellite data of the satellite 3 into the database 11, and the management personnel immediately carry out the license plate feature through the software program. Quickly identify, compare, and send the analysis results to the sub-monitoring point 6 near the collection point.

As shown in FIG. 2 , the video information collection point 1 of the present invention is mainly composed of a camera 7 and a first video codec 8 . The first video codec 8 is responsible for converting the analog video signal of the camera 7 into a digital signal, compressing it at the same time, and also transmitting the control signal. The first video codec 8 has a built-in 10/100M network card, which is connected to the wireless device through a network cable , the encoded and compressed monitoring information is collected to the monitoring management center 5 through the wireless transmission system 2 .

As shown in Figure 3, the monitoring center of the present invention is the most important part of the whole monitoring system, and the monitoring center is composed of a second video codec 9 and a monitoring computer 10, and the monitoring computer 10 includes a database 11, an electronic map 12 and a video capture card 13. After the second video codec 9 converts the digital signal of the collection point received into an analog signal, it is sent to the monitoring computer 10, and the video capture card 13 will automatically capture the license plate of the received image information, and then start the hardware computing module , carry out a large-scale correlation search on the image, look for clues related to the characteristics of the license plate and several areas that match the characteristics of the license plate, use software to further evaluate and compare these candidate areas, and finally select an optimal area as the license plate area, Segment it from the image. The subsequent processing is limited to this area and is mainly completed by software, including license plate boundary positioning, character edge extraction, character rough segmentation, character fine segmentation, character feature extraction, character recognition, license plate background color recognition and recognition results Confidence analysis, etc. If the confidence level is lower than the set threshold, an alarm will be prompted; if the confidence level is higher than the set threshold, the comparison of position information will continue. Because the real-time monitoring of satellites to legal taxis can see the position of legal vehicles at any time on the electronic map 12, so if the position information of the collection point matches the position on the electronic map 12, then it is determined that the taxi that appears at the collection point is not a taxi. If the location information does not match, it is determined that the taxi at the collection point is a licensed vehicle. All required data and comparison results are all stored in the database 11, so that the identification process to the deck car can be completed, and the whole process only needs a few seconds.

Fig. 4 is the flow chart of the taxi wireless video monitoring method based on GPS of the present invention, at first, monitoring computer 10 boots, starts wireless transmission system 2, connects corresponding video information collection point 1, sends video collection request, enters waiting state then, After the signal is converted by the video information collection point 1, it is sent to the monitoring computer 10 and stored in the database 11 for subsequent identification processing. At the same time, the legal taxi transmits the data transmitted by the GPS satellite to the monitoring center 5. At this time, the management personnel will check the data of the captured license plate, because the characteristic information of all legal taxi license plates is stored in the database 11, so only It takes less than 1 second to analyze whether the collected license plate is one of these legal license plates. If it matches the data in the database, compare the license plate at the collection point with the license plate located by GPS. If the location is the same , judged to be a legal taxi, return to the video collection step, and continue to collect vehicle information. On the contrary, it is judged to be a false plate car, and the monitoring computer 10 will send an alarm, and then send the analysis result to the sub-monitoring point 6 near the collection point, and implement corresponding interception to the false plate car.

Claims (7)

1. The taxi wireless video surveillance equipment based on GPS, comprises video information collection point, wireless transmission system, monitoring center and GPS receiver, it is characterized in that, described video information collection point comprises camera and the first video codec, The first video codec has a built-in wireless network card; the camera is responsible for shooting the passing taxis, and the collected video analog signal is converted into a digital signal through the first video codec, and the built-in wireless network card of the first video codec is passed through The wireless transmission system sends it to the monitoring center, and the wireless transmission system is responsible for sending the information of each video information collection point to the monitoring center, and sending the information after the license plate recognition by the monitoring center to each sub-monitoring center point; the monitoring center includes a second video codec and a monitoring computer. After receiving the digital video signal from the video information collection point, the second video codec converts it into a visual analog signal, and the monitoring computer checks the taxi license plate Numbers are automatically captured, so as to identify and compare processing with GPS positioning information, and send the analysis results to sub-monitoring points near each video information collection point; GPS receivers are installed on every legal taxi, and GPS receivers Calculate the current position of the vehicle according to the received satellite positioning information, the vehicle communication controller extracts the required position, speed and time information from the signal output by the GPS receiver, and forms a data packet in combination with information such as vehicle identity, through the The wireless transmission system is sent to the monitoring center. 2. The taxi wireless video surveillance equipment based on GPS according to claim 1, is characterized in that, this system also comprises a database, and the various information of all legal taxis, the video data of collection point and the satellite video data of the collection point are stored in this database. positioning data. 3. The GPS-based wireless video monitoring device for taxis according to claim 1, wherein the monitoring computer is connected to a wireless network through a built-in wireless network card to receive or send data. 4. The wireless video surveillance equipment for taxis based on GPS according to claim 1, wherein said monitoring computer has a built-in electronic map, and monitors the position of legal taxis in real time according to satellite positioning data. 5. The wireless video surveillance equipment for taxis based on GPS according to claim 1, wherein the video capture card inside the monitoring computer carries out license plate automatic capture to the video received. 6. the monitoring method of the taxi wireless video monitoring equipment based on GPS according to claim 1, is characterized in that, the method steps are as follows: a. Start the monitoring computer and input the management personnel information; b. The monitoring computer generates a wireless network connection request, and connects to the video codec of the video collection point through the wireless transmission system; c. The video information collection point collects information, and converts the video signal into a digital signal and transmits it to the monitoring center through the video codec. At the same time, the legal taxi extracts the required information from the signal output by the GPS receiver through the vehicle communication controller The location, speed and time information of the vehicle, combined with the vehicle identity information to form a data packet, and then sent to the monitoring center through the wireless transmission system; d. The monitoring computer matches and compares the location information of the inspected vehicle at the collection point with the location information of legal taxis with the same license plate number in the database. If the locations are consistent, it determines that the inspected vehicle is a legal taxi, and returns to step c. If the positions are inconsistent, it will be judged as a decked vehicle and proceed to the next step; e. The monitoring center transmits the recognition results to the sub-monitoring points near the collection point, so that relevant departments can intercept illegal vehicles such as license plates. 7. The wireless video monitoring method for taxis based on GPS according to claim 6, wherein the monitoring center will give an alarm prompt to the identified license plate car.

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