CN113706881B - Visible light-based vehicle fake plate detection system and method - Google Patents

Visible light-based vehicle fake plate detection system and method Download PDF

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Publication number
CN113706881B
CN113706881B CN202110873395.6A CN202110873395A CN113706881B CN 113706881 B CN113706881 B CN 113706881B CN 202110873395 A CN202110873395 A CN 202110873395A CN 113706881 B CN113706881 B CN 113706881B
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vehicle
cloud
module
number plate
management server
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CN113706881A (en
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李平
孙晓鹏
马骥
武宗品
彭金辉
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Zhengzhou Xinda Jiean Information Technology Co Ltd
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Zhengzhou Xinda Jiean Information Technology Co Ltd
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    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/01Detecting movement of traffic to be counted or controlled
    • G08G1/017Detecting movement of traffic to be counted or controlled identifying vehicles
    • G08G1/0175Detecting movement of traffic to be counted or controlled identifying vehicles by photographing vehicles, e.g. when violating traffic rules
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114Indoor or close-range type systems
    • H04B10/116Visible light communication

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  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Traffic Control Systems (AREA)

Abstract

The invention provides a visible light-based vehicle fake-license plate detection system and method. The system comprises: the system comprises a cloud traffic management server, at least one acquisition end and at least one vehicle end; the cloud traffic management server comprises a cloud digital watermark module and a cloud detection module; the acquisition end comprises an acquisition end visible light module; the vehicle end comprises a vehicle end visible light module; the acquisition end and the vehicle end carry out visible light communication interaction through the acquisition end visible light module and the vehicle end visible light module; the acquisition terminal is used for acquiring the vehicle number plate image of the vehicle end in real time and acquiring the vehicle identification code of the vehicle end from the vehicle end; and the cloud digital watermark module is used for identifying the digital watermark embedded in the vehicle license plate image and/or extracting the cloud detection module, and is used for verifying whether the vehicle license plate is a legal safe vehicle license plate or not and whether the vehicle license plate is a fake license plate or not based on the digital watermark, the vehicle license plate image and the vehicle identification code.

Description

Visible light-based vehicle fake plate detection system and method
Technical Field
The invention relates to the field of license plate recognition technology and visible light communication technology, in particular to a visible light-based vehicle fake license plate detection system and method.
Background
Fake-licensed vehicles generally refer to motor vehicles that use counterfeit, altered vehicle numbers, use the numbers of other vehicles, or use deception and bribing means to obtain the vehicle numbers. The fake-licensed behavior disturbs national economic order, transport market operational order, manufacturing social instability factors and seriously infringes the legal interests of the original legal vehicle owners, and the harm is not inconstant.
The existing anti-fake license plate technical scheme mainly comprises a scheme of adding a visible light or a recognizable anti-fake film and anti-fake patterns under a special illumination condition on a license plate entity, a scheme of adding additional information such as two-dimensional codes, three-dimensional codes and the like on an additional area on the license plate, a scheme of calculating and comparing the speed and/or time according to the information of the same license plate collected at different empty positions and the like.
The Visible Light Communication technology (Visible Light Communication) is a Communication method in which Light in the Visible Light band is used as an information carrier and an optical signal is directly transmitted in the air. The visible light has the characteristics of high rate, no electromagnetic radiation, high density, low cost, rich frequency spectrum, high confidentiality and the like.
The existing vehicle fake-license detecting scheme does not apply the digital watermarking technology to the vehicle license plate to detect the vehicle fake-license. How to utilize the visible light communication technology and combine the digital watermark technology to realize the detection of the vehicle fake plate is a problem which needs to be solved urgently.
Disclosure of Invention
In order to realize the detection of the vehicle fake plate by combining the digital watermarking technology under the background of the development of the current visible light communication technology, the invention provides the vehicle fake plate detection system and method based on the visible light.
In one aspect, the present invention provides a visible light-based vehicle fake-license detecting system, including: the system comprises a cloud traffic management server, at least one acquisition end and at least one vehicle end; the cloud traffic management server comprises a cloud digital watermark module and a cloud detection module; the acquisition end comprises an acquisition end visible light module; the vehicle end comprises a vehicle end visible light module; the acquisition end and the vehicle end carry out visible light communication interaction through the acquisition end visible light module and the vehicle end visible light module;
the acquisition terminal is used for acquiring the vehicle number plate image of the vehicle end in real time and acquiring the vehicle identification code of the vehicle end from the vehicle end;
the cloud digital watermark module is used for identifying and/or extracting the digital watermark embedded in the vehicle license plate image; the digital watermark comprises a first cloud digital abstract of a common vehicle license plate image, a vehicle identification code corresponding to the vehicle license plate when the vehicle license plate is registered in a vehicle management department, and a first cloud digital signature of the first cloud digital abstract and the vehicle identification code;
the high in the clouds detection module is used for verifying based on the digital watermark, vehicle number plate image and vehicle identification code whether the vehicle number plate is legal safe vehicle number plate and whether the vehicle number plate is a fake plate, specifically is:
calling the cloud digital watermark module to try to identify the digital watermark contained in the vehicle license plate image sent by the acquisition end; if the digital watermark identification fails, judging that the vehicle license plate corresponding to the vehicle license plate image is an illegal safe vehicle license plate, and then generating and returning a vehicle license plate digital watermark identification failure message to the acquisition end; if the digital watermark is successfully identified, the cloud detection module extracts digital watermark information contained in the vehicle license plate image to obtain a first cloud digital abstract, a vehicle identification code and a first cloud digital signature; then, checking the first cloud digital signature according to the first cloud digital abstract and the vehicle identification code; if the verification of the signature fails, judging that the vehicle number plate corresponding to the vehicle number plate image is an illegal safe vehicle number plate, and then generating and returning a first cloud digital signature verification failure message to the acquisition end; if the verification is successful, the vehicle number plate image is judged to be a complete and non-tampered vehicle number plate and is a legal and safe vehicle number plate issued by the cloud traffic management server; then comparing the vehicle identification code extracted from the digital watermark with the vehicle identification code sent by the acquisition end, and if the comparison is the same, generating and returning a message that the vehicle number plate identification verification is successful and the plate is not fake to the acquisition end; and if the comparison is different, generating and returning a vehicle number plate as a fake plate message to the acquisition end.
Further, the collecting end comprises a camera module and a collecting end processing module;
the camera module is used for shooting the vehicle number plate at the vehicle end in real time to obtain a vehicle number plate image;
the collection end processing module is used for collecting the vehicle number plate image of the vehicle end collected by the camera module and the vehicle identification code information of the vehicle end collected by the collection end visible light module, and communicating with the cloud traffic management server, receiving and sending corresponding information, so that the cloud traffic management server can detect, verify and process the authenticity of the vehicle number plate and check the vehicle identification code.
Further, the acquisition end visible light module specifically comprises an acquisition end visible light control unit, an acquisition end visible light emitting unit and an acquisition end visible light receiving unit; the vehicle-end visible light module comprises a vehicle-end visible light control unit, a vehicle-end visible light emitting unit and a vehicle-end visible light receiving unit;
the acquisition end visible light control unit is used for converting an electric signal of information required to be sent by the acquisition end into an optical signal for the acquisition end visible light emitting unit to emit outwards, and converting the optical signal received by the acquisition end visible light receiving unit into an electric signal for the acquisition end to use;
the vehicle-end visible light control unit is used for converting an electric signal of information required to be sent by the vehicle end into an optical signal for the vehicle-end visible light emitting unit to emit outwards, and converting the optical signal received by the vehicle-end visible light receiving unit into the electric signal for the vehicle end to use.
Further, the cloud traffic management server further comprises a cloud security module, the acquisition end further comprises an acquisition end security module, and the vehicle end further comprises a vehicle end security module;
the cloud end safety module, the acquisition end safety module and the vehicle end safety module are respectively used for providing a password service function and a safety storage function for the cloud end traffic management server, the acquisition end and the vehicle end;
the vehicle identification code of the vehicle end is arranged in the safe storage area of the vehicle end safety module by a vehicle production party before the vehicle leaves a factory, the vehicle identification code only provides a read-only function after being arranged in the safe storage area of the vehicle end safety module, and a vehicle user can not change the vehicle identification code arranged in the safe storage area of the vehicle end safety module.
Further, the cloud detection module further comprises a digital certificate module;
the digital certificate module is used for respectively generating and storing public key certificates for the cloud traffic management server and the acquisition end; the digital certificate module writes the public key certificate of the acquisition end and the public key certificate of the cloud traffic management server into the acquisition end safety module in an off-line or on-line mode; the cloud traffic management server and the acquisition end respectively store private keys corresponding to public keys in corresponding public key certificates; the private key of the cloud traffic management server is stored in the digital certificate module or the safe storage area of the cloud safety module; and the private key of the acquisition end is stored in the safe storage area of the acquisition end safety module.
Furthermore, the acquisition end also comprises an acquisition end positioning module;
the acquisition end positioning module is used for acquiring the position information of the acquisition end;
correspondingly, the collecting end processing module is further configured to collect the position information of the collecting end obtained from the collecting end positioning module and the time information of the collecting end when the collecting end collects the vehicle number plate image, the vehicle identification code and the position information of the collecting end, and send the vehicle number plate image, the vehicle identification code, the position information of the collecting end and the time information to the cloud traffic management server;
correspondingly, the cloud traffic management server is further used for carrying out vehicle positioning, vehicle tracking and/or vehicle management according to the vehicle number plate image, the vehicle identification code, the position information of the acquisition end and the time information.
Further, when a plurality of collecting terminals are provided, the cloud traffic control server comprehensively calculates the position of the vehicle represented by the vehicle terminal at the corresponding moment according to the vehicle number plate image, the vehicle identification code, the position information of the collecting terminal and the time information of the certain vehicle terminal reported by different collecting terminals;
when the distance value between two acquisition ends in different geographic positions exceeds the product of the difference value of the time of the vehicle end before and after the two acquisition ends and the maximum driving speed of the vehicle end allowed by a vehicle management department on a corresponding driving road section, the cloud traffic management server judges that the corresponding vehicle number plate is fake or the corresponding vehicle end vehicle speed is violated, and then informs the traffic management department of further verification and/or processing.
Further, the camera module comprises a first camera, a second camera, a third camera, a vehicle number plate identification module, a vehicle number plate synthesis module, a light sensing module and a light supplementing module;
the first camera is used for collecting real-time video information of the vehicle end and has an infrared camera shooting function;
the second camera is a long-focus camera and is used for photographing the vehicle number plate at the vehicle end;
the third camera is a wide-angle camera and is used for photographing the vehicle number plate at the vehicle end;
the vehicle license plate recognition module is used for recognizing the video information collected by the first camera in real time, and calling the second camera and the third camera to photograph the vehicle license plate if a vehicle license plate image is recognized in the video information;
the vehicle license plate synthesizing module is used for calculating and synthesizing the vehicle license plate images shot by the second camera and the third camera respectively to obtain clear and high-quality vehicle license plate images;
the light sensing module is used for sensing whether the intensity of light is proper or not when the second camera and the third camera take a picture, and then calling the light supplementing module to supplement light according to the requirement;
and the light supplementing module is used for supplementing light when the second camera and the third camera take photos.
In another aspect, the present invention provides a visible light-based vehicle fake plate detection method, including:
step 1: the acquisition end acquires the vehicle number plate image of the vehicle end in real time, acquires the vehicle identification code of the vehicle end from the vehicle end through the acquisition end visible light module, and sends the vehicle number plate image and the vehicle identification code to the cloud traffic management server;
step 2: after receiving the vehicle license plate image and the vehicle identification code, the cloud traffic management server tries to identify the digital watermark contained in the vehicle license plate image: if the digital watermark identification fails, the vehicle number plate corresponding to the vehicle number plate image is judged to be an illegal safe vehicle number plate, and the cloud traffic management server generates and returns a vehicle number plate digital watermark identification failure message to the acquisition end; if the digital watermark is successfully identified, the cloud traffic management server extracts the digital watermark contained in the vehicle license plate image, and a first cloud digital abstract, a vehicle identification code and a first cloud digital signature are obtained from the digital watermark;
and step 3: the cloud traffic management server checks the first cloud digital signature acquired from the digital watermark according to the first cloud digital abstract and the vehicle identification code acquired from the digital watermark: if the signature verification fails, judging that the vehicle number plate corresponding to the vehicle number plate image is an illegal safe vehicle number plate, and generating and returning a first cloud digital signature verification failure message to the acquisition end; if the verification is successful, the vehicle number plate image is judged to be a complete and non-tampered vehicle number plate and is a legal and safe vehicle number plate issued by the cloud traffic management server;
and 4, step 4: the cloud traffic management server compares the vehicle identification code obtained from the digital watermark with the vehicle identification code sent by the acquisition end: if the comparison is the same, generating and returning a message that the vehicle number plate identification verification is successful and the plate is not fake to the acquisition end; and if the comparison is different, generating and returning a vehicle number plate as a fake plate message to the acquisition end.
Further, before the collection end sends vehicle license plate image and vehicle identification code to high in the clouds traffic management server, still include: the collecting end generates a first collecting end digital abstract for the vehicle number plate image and the vehicle identification code, and generates a first collecting end digital signature for the first collecting end digital abstract;
correspondingly, the acquisition end sends the vehicle number plate image, the vehicle identification code and the first acquisition end digital signature to the cloud traffic management server;
correspondingly, before attempting to identify the digital watermark contained in the vehicle license plate image, the cloud traffic management server further includes: the cloud traffic management server generates a second cloud digital abstract according to the received vehicle license plate image and the received vehicle identification code, checks the first acquisition end digital signature, and if the check is successful, judges that the vehicle license plate image and the vehicle identification code sent by the acquisition end are complete and not tampered, and the identity of the acquisition end is real.
Further, the method further comprises:
the cloud traffic management server signs the information of the cloud returned collection end before returning any type of information in the information of the collection end to obtain a second cloud digital signature; then sending the information of the cloud end returned to the acquisition end and the second cloud end digital signature to the acquisition end;
the acquisition end checks the second cloud digital signature based on the received cloud return acquisition end message: if the verification fails, the acquisition end returns a second cloud digital signature verification failure message to the cloud traffic management server; if the check sign is successful, judging that the message returned by the cloud end from the cloud end delivery management server is complete and is not tampered, and the identity of the cloud end delivery management server is real;
the cloud traffic management server is used for receiving a vehicle number plate digital watermark identification failure message, a first cloud digital signature verification failure message, a vehicle number plate identification verification failure message and a vehicle number plate non-fake-license message, wherein the vehicle number plate digital watermark identification failure message, the first cloud digital signature verification failure message, the vehicle number plate identification verification failure message and the vehicle number plate fake-license message which are returned by the acquisition end from the cloud traffic management server are collectively called a cloud return acquisition end message.
Further, before vehicle fake-license detection is carried out on the safety vehicle license plate, the method further comprises the following steps: generating a safe vehicle number plate and installing the safe vehicle number plate at the vehicle end;
wherein, the process of generating the safe vehicle license plate includes:
step A1: the cloud traffic management server generates a common vehicle license plate image according to the vehicle identification code; generating a first cloud digital abstract based on the common vehicle license plate image, and generating a first cloud digital signature based on the first cloud digital abstract and the vehicle identification code;
step A2: the cloud traffic management server takes the first cloud digital abstract, the vehicle identification code and the first cloud digital signature as parameters to generate a digital watermark, and the digital watermark is embedded into a common vehicle license plate image to generate a safe vehicle license plate image;
step A3: and generating a safe vehicle number plate according to the safe vehicle number plate image.
The invention has the beneficial effects that:
firstly, digital watermark information is embedded into a vehicle number plate image so as to generate a safe vehicle number plate, wherein the digital watermark information comprises abstract information of a common vehicle number plate image, a vehicle identification code corresponding to the vehicle number plate when the vehicle number plate is registered in a vehicle management department and signature information obtained after the cloud traffic management server carries out digital signature on the digital abstract and the vehicle identification code. Through the verification of the abstract information of the vehicle license plate image and the signature information of the vehicle identification code, whether the image content of the safe vehicle license plate is complete or not and whether the image content is tampered or not can be determined, and whether the image content is signed by the cloud traffic management server or not can be confirmed. The problem of harm of fake plate and the like caused by illegal altering, tampering and/or copying of the vehicle license plate image is solved from the source, because once the safe vehicle license plate image is illegally altered, tampered and/or copied, the illegal operations can be verified;
secondly, the vehicle identification code information contained in the digital watermark is compared with the vehicle identification code information which is arranged in a factory and can only be read by a vehicle user when the vehicle leaves the factory, so that whether the vehicle license plate is a fake plate vehicle or not can be determined;
thirdly, when the verification result of the vehicle license plate identification verification or the comparison result of the vehicle identification code information is in a problem, a vehicle management department can be timely informed to check whether the integrity of the safe vehicle license plate is damaged, tampered, forged or not and/or check the fake license plate behavior of the vehicle license plate;
fourthly, when the acquisition end and the cloud traffic management server communicate with each other, the communication information of the two parties is signed and verified, so that the integrity of the information and the authenticity of the identity of the sender in the communication process of the two parties are ensured;
fifthly, the visible light communication technology is adopted between the acquisition end and the vehicle end, so that the information transmission and the information cooperation between the acquisition end and the vehicle end are realized; the information transmission process between the acquisition end and the vehicle end can not generate electromagnetic interference and can not be interfered by the electromagnetic interference, thereby ensuring the safety of the information and the successful transmission of the information.
Drawings
Fig. 1 is a schematic diagram of a visible light-based vehicle fake-license detecting system according to an embodiment of the present invention;
fig. 2 is a second schematic diagram of a visible light-based vehicle fake-license detecting system according to an embodiment of the present invention;
fig. 3 is a third schematic view of a visible light-based vehicle fake-license detecting system according to an embodiment of the present invention;
fig. 4 is a fourth schematic view of a visible light-based vehicle fake-license detecting system according to an embodiment of the present invention;
fig. 5 is a fifth schematic view illustrating a configuration of a visible light-based vehicle fake-license detecting system according to an embodiment of the present invention;
fig. 6 is a sixth schematic view of a visible light-based vehicle fake-license detecting system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1, an embodiment of the present invention provides a visible light-based vehicle fake plate detection system, which includes a cloud traffic management server, at least one collection end, and at least one vehicle end; the cloud traffic management server comprises a cloud digital watermark module and a cloud detection module; the acquisition end comprises an acquisition end visible light module; the vehicle end comprises a vehicle end visible light module; the acquisition end and the vehicle end carry out visible light communication interaction through the acquisition end visible light module and the vehicle end visible light module;
the acquisition end is used for acquiring the vehicle number plate image of the vehicle end in real time and acquiring the vehicle identification code of the vehicle end from the vehicle end;
the cloud digital watermark module is used for identifying and/or extracting the digital watermark embedded in the vehicle license plate image; the digital watermark comprises a first cloud digital abstract of a common vehicle license plate image, a vehicle identification code corresponding to the vehicle license plate when the vehicle license plate is registered in a vehicle management department, and a first cloud digital signature of the first cloud digital abstract and the vehicle identification code;
the high in the clouds detection module is used for verifying based on the digital watermark, vehicle number plate image and vehicle identification code whether the vehicle number plate is legal safe vehicle number plate and whether the vehicle number plate is a fake plate, specifically is:
calling the cloud digital watermark module to try to identify the digital watermark contained in the vehicle license plate image sent by the acquisition end; if the digital watermark identification fails, judging that the vehicle license plate corresponding to the vehicle license plate image is an illegal safe vehicle license plate, and then generating and returning a vehicle license plate digital watermark identification failure message to the acquisition end; if the digital watermark is successfully identified, the cloud detection module extracts digital watermark information contained in the vehicle license plate image to obtain a first cloud digital abstract, a vehicle identification code and a first cloud digital signature; then, according to the first cloud digital abstract and the vehicle identification code, the first cloud digital signature is verified; if the verification of the signature fails, judging that the vehicle number plate corresponding to the vehicle number plate image is an illegal safe vehicle number plate, and then generating and returning a first cloud digital signature verification failure message to the acquisition end; if the signature verification is successful, judging that the vehicle number plate image is complete and is not tampered and is a legal safe vehicle number plate signed and issued by the cloud traffic management server; then comparing the vehicle identification code extracted from the digital watermark with the vehicle identification code sent by the acquisition end, and if the comparison is the same, generating and returning a message that the vehicle number plate identification verification is successful and the plate is not fake to the acquisition end; and if the comparison is different, generating and returning a vehicle number plate as a fake plate message to the acquisition end.
Specifically, the vehicle management department refers to a public security traffic management department, and a specific responsible department is subject to the provision of corresponding laws and regulations;
the vehicle license plate is commonly called as a license plate and a license plate, is a plate material respectively hung at the front and the back of a vehicle, is made of aluminum, iron sheet, plastic or paper, and is engraved with the registration number, the registration area or other related information of the vehicle;
the Vehicle Identification Number (or called frame Number, or VIN for short) is a group consisting of a plurality of letters and/or numbers, is used for a group of unique numbers on the automobile, and can identify the manufacturer, the engine, the chassis serial Number and other performance data of the automobile;
and the vehicle management department stores the vehicle number plate and the vehicle identification code corresponding to the vehicle number plate when the vehicle number plate is registered in the vehicle management department in the cloud traffic management server for later use.
As an implementation manner, the acquisition end visible light module specifically includes an acquisition end visible light control unit, an acquisition end visible light emitting unit, and an acquisition end visible light receiving unit; the vehicle-end visible light module comprises a vehicle-end visible light control unit, a vehicle-end visible light emitting unit and a vehicle-end visible light receiving unit;
the acquisition end visible light control unit is used for converting an electric signal of information required to be sent by the acquisition end into an optical signal for the acquisition end visible light emitting unit to emit outwards, and converting the optical signal received by the acquisition end visible light receiving unit into an electric signal for the acquisition end to use;
the vehicle-end visible light control unit is used for converting an electric signal of information required to be sent by the vehicle end into an optical signal for the vehicle-end visible light emitting unit to emit outwards, and converting the optical signal received by the vehicle-end visible light receiving unit into the electric signal for the vehicle end to use.
In practical application, the acquisition end visible light emitting unit and the vehicle end visible light emitting unit are both Light Emitting Diode (LED); the acquisition end visible light receiving unit and the vehicle end visible light receiving unit are both photoelectric detectors; in particular, the vehicle-end visible light emitting unit can also be integrated into an LED daytime running lamp of the vehicle end.
Example 2
As shown in fig. 2, on the basis of the above embodiment, the embodiment of the present invention is different from embodiment 1 in that the collecting end includes a camera module and a collecting end processing module;
the camera module is used for shooting the vehicle number plate at the vehicle end in real time to obtain a vehicle number plate image;
the collection end processing module is used for collecting the vehicle number plate image of the vehicle end collected by the camera module and the vehicle identification code information of the vehicle end collected by the collection end visible light module, and communicating with the cloud traffic management server, receiving and sending corresponding information, so that the cloud traffic management server can detect, verify and process the authenticity of the vehicle number plate and check the vehicle identification code.
As an implementation manner, the camera module specifically includes a first camera, a second camera, a third camera, a vehicle number plate recognition module, a vehicle number plate synthesis module, a light sensing module and a light supplementing module; the first camera is used for collecting real-time video information of the vehicle end and has an infrared camera shooting function; the second camera is a long-focus camera and is used for photographing the vehicle number plate at the vehicle end; the third camera is a wide-angle camera and is used for photographing the vehicle number plate at the vehicle end; the vehicle license plate recognition module recognizes the video information collected by the first camera in real time, and if the image information of the vehicle license plate is recognized in the video information, the second camera and the third camera are called to photograph the safe vehicle license plate; the second camera and the third camera can dynamically change shooting angles under the dispatching of the vehicle license plate identification module to aim at the vehicle end, and then can automatically adjust focal lengths to provide better shooting quality; the vehicle license plate synthesizing module is used for calculating and synthesizing the vehicle license plate images shot by the second camera and the third camera respectively to obtain clear and high-quality vehicle license plate images; the light sensing module is used for sensing whether the intensity of light is proper or not when the second camera and the third camera take a picture, and calling the light supplementing module to supplement light according to the requirement; and the light supplementing module is used for supplementing light when the second camera and the third camera take photos.
In practical application, the first camera adopts an ultra-high-definition camera or a full-high-definition camera, has a resolution of 1080P (1920 x 1080) or more, is mainly used for shooting a video in a driving process, and is provided for a vehicle license plate identification module to identify a vehicle license plate; the first camera can also adopt a binocular camera; the second camera and the third camera adopt ultra-high resolution lenses (such as 4500 ten thousand pixels and more) and are used for shooting pictures of the vehicle license plate and generating image information of the vehicle license plate.
Example 3
On the basis of the above embodiments, as shown in fig. 3, in the embodiment of the present invention, the cloud traffic management server further includes a cloud security module, the acquisition end further includes an acquisition end security module, and the vehicle end further includes a vehicle end security module;
the cloud end safety module, the acquisition end safety module and the vehicle end safety module are respectively used for providing a password service function and a safety storage function for the cloud end traffic management server, the acquisition end and the vehicle end;
the vehicle end is characterized in that the vehicle identification code of the vehicle end is arranged in the safe storage area of the vehicle end safety module before the vehicle leaves a factory by a vehicle production party, the vehicle identification code is arranged in the safe storage area of the vehicle end safety module, and only a read-only function is provided, so that the vehicle identification code arranged in the safe storage area of the vehicle end safety module cannot be changed by a vehicle using party. And the acquisition end acquires the vehicle identification code from the vehicle end through visible light communication between the acquisition end visible light module and the vehicle end visible light module.
Specifically, a safe storage area is respectively arranged in the cloud end safety module, the acquisition end safety module and the vehicle end safety module; the secure storage area may be used to store digital certificates, private keys, and other important information and data; the cryptographic service functions include, but are not limited to, generating random numbers, digital signature operations, digital signature verification operations, encryption and decryption operations, generating session keys, and generating digital digests.
As an implementation manner, the cloud security module, the acquisition end security module and the vehicle end security module are all security intelligent chips, and commercial cryptographic algorithms supported by the security intelligent chips include but are not limited to one or more of SM1, SM2, SM3, SM4 and SM9, and international common cryptographic algorithms supported by the security intelligent chips include but are not limited to one or more of 3DES, AES, RSA, SHA-1 and SHA-256; the secure intelligent chip supports storing a digital certificate; the safety intelligent chip provides a safety storage area and supports the safety storage of important information; the safety intelligent chip supports generation of random numbers; the digital certificate module also maintains a certificate revocation list and provides a certificate revocation list query function.
Example 4
On the basis of the foregoing embodiment 3, as shown in fig. 4, in an embodiment of the present invention, the cloud traffic management server further includes a digital certificate module; the digital certificate module is used for generating and storing public key certificates for the cloud traffic management server and the acquisition end respectively; the digital certificate module writes the public key certificate of the acquisition end and the public key certificate of the cloud traffic management server into the acquisition end safety module in an off-line or on-line mode; the cloud traffic management server and the acquisition end respectively store private keys corresponding to public keys in corresponding public key certificates; the private key of the cloud traffic management server is stored in the digital certificate module or the safe storage area of the cloud safety module; and the private key of the acquisition end is stored in the safe storage area of the acquisition end safety module.
Further, the digital certificate module is also used for generating and storing a public key certificate for the vehicle end; the digital certificate module writes the public key certificate of the vehicle end and the public key certificate of the cloud traffic management server into the vehicle end safety module in an off-line or on-line mode; the vehicle end stores a private key corresponding to a public key in a corresponding public key certificate; the private key of the vehicle end is stored in the safe storage area of the vehicle end safety module; this can make the car end also possess the ability of carrying out safe encryption communication with the high in the clouds traffic management server.
Example 5
On the basis of the above embodiments, as shown in fig. 5, in the embodiment of the present invention, the acquisition end further includes an acquisition end positioning module; the acquisition end positioning module is used for acquiring the position information of the acquisition end;
correspondingly, the collecting end processing module is further configured to collect the position information of the collecting end obtained from the collecting end positioning module and the time information of the collecting end when the collecting end collects the vehicle number plate image, the vehicle identification code and the position information of the collecting end, and send the vehicle number plate image, the vehicle identification code, the position information of the collecting end and the time information to the cloud traffic management server;
correspondingly, the cloud traffic management server is further used for carrying out vehicle positioning, vehicle tracking and/or vehicle management according to the vehicle number plate image, the vehicle identification code, the position information of the acquisition end and the time information.
Specifically, the cloud traffic management server depicts the position, the historical driving track and the like of the vehicle represented by the currently shot vehicle end at the corresponding time according to the vehicle number plate image, the vehicle identification code, the position information of the acquisition end and the time information, so that the functions of vehicle positioning, vehicle tracking, vehicle management and the like are realized.
As an implementation manner, when a plurality of collecting ends are provided, the cloud traffic management server comprehensively calculates the position of the vehicle represented by the vehicle end at the corresponding moment according to the vehicle number plate image, the vehicle identification code, the position information of the collecting end and the time information of the certain vehicle end reported by different collecting ends;
when the distance value between two acquisition ends in different geographic positions exceeds the product of the difference value of the time of the vehicle end before and after the two acquisition ends and the maximum driving speed of the vehicle end allowed by a vehicle management department on a corresponding driving road section, the cloud traffic management server judges that the corresponding vehicle number plate is fake or the corresponding vehicle end vehicle speed is violated, and then informs the traffic management department of further verification and/or processing.
In the above embodiments, the installation mode of the collecting end includes a fixed mode and a movable mode; wherein the fixed type is that the acquisition end is installed at a fixed position, and the fixed position includes but is not limited to a traffic gate, a toll station and a road side; the mobile mode refers to that the acquisition end is arranged on the mobile equipment; the mobile device includes but is not limited to a smart phone and a special mobile terminal.
Further, when the collection end is movable, the camera module of the collection end is used for directly collecting and/or identifying the vehicle identification code printed and/or engraved at each place on the vehicle body of the vehicle end besides the vehicle number plate image of the vehicle end. For example, the camera module is directly used for shooting and identifying the vehicle identification code mark below a front windshield of the vehicle end or at a vehicle body girder and the like to obtain the vehicle identification code of the vehicle end.
Further, as shown in fig. 6, when the collection end is mobile, the collection end further includes a collection end wireless communication module, and the collection end is in communication connection with the cloud traffic management server through a mobile communication network in a wireless communication manner, where the mobile communication network includes, but is not limited to, a 5G and/or 6G network.
In addition, the cloud digital watermark module is also used for generating a digital watermark and embedding the digital watermark into a common vehicle license plate image to form a safe vehicle license plate image;
correspondingly, the cloud traffic management server further comprises a vehicle number plate storage module; and the vehicle license plate storage module is used for storing the safe vehicle license plate image generated by the cloud digital watermarking module for the cloud traffic management server to search.
It can be understood that in each embodiment of the invention, the vehicle number plate is divided into a common vehicle number plate and a safe vehicle number plate; the common vehicle number plate comprises one or more of a large-scale vehicle number plate, a trailer number plate, a small-scale vehicle number plate, an embassy vehicle number plate, a guinance vehicle number plate, an inbound and outbound vehicle number plate, a coach vehicle number plate, a police vehicle number plate, a common motorcycle number plate, a light motorcycle number plate, an embassy motorcycle number plate, a guinance motorcycle number plate, a coach motorcycle number plate, a police motorcycle number plate, a low-speed vehicle number plate, a temporary driving number plate and an agricultural vehicle number plate; the safe vehicle license plate is a vehicle license plate generated after the digital watermark is embedded in a common vehicle license plate.
Example 6
The embodiment of the invention provides a visible light-based vehicle fake plate detection method, which comprises the following steps:
s101: the method comprises the steps that a collecting end collects a vehicle number plate image of a vehicle end in real time, a vehicle identification code of the vehicle end is obtained from the vehicle end through a visible light module of the collecting end, and the vehicle number plate image and the vehicle identification code are sent to a cloud traffic management server;
specifically, after the distance between the vehicle end and the collection end enters the camera shooting range of the camera module, the collection end shoots the vehicle number plate of the vehicle end in real time through the camera module to obtain a vehicle number plate image. And the acquisition end acquires the vehicle identification code from the vehicle end through the acquisition end visible light module.
S102: after receiving the vehicle license plate image and the vehicle identification code, the cloud traffic management server tries to identify the digital watermark contained in the vehicle license plate image: if the digital watermark identification fails, the vehicle number plate corresponding to the vehicle number plate image is judged to be an illegal safe vehicle number plate, and the cloud traffic management server generates and returns a vehicle number plate digital watermark identification failure message to the acquisition end; if the digital watermark is successfully identified, the cloud traffic management server extracts the digital watermark contained in the vehicle license plate image, and a first cloud digital abstract, a vehicle identification code and a first cloud digital signature are obtained from the digital watermark;
specifically, if the digital watermark information is failed to be identified, it indicates that the digital watermark information is not contained in the vehicle license plate image or the digital watermark information is damaged and cannot be identified.
S103: the cloud traffic management server checks the first cloud digital signature acquired from the digital watermark according to the first cloud digital abstract and the vehicle identification code acquired from the digital watermark: if the signature verification fails, judging that the vehicle number plate corresponding to the vehicle number plate image is an illegal safe vehicle number plate, and generating and returning a first cloud digital signature verification failure message to the acquisition end; if the verification is successful, the vehicle number plate image is judged to be a complete and non-tampered vehicle number plate and is a legal and safe vehicle number plate issued by the cloud traffic management server;
s104: the cloud traffic management server compares the vehicle identification code obtained from the digital watermark with the vehicle identification code sent by the acquisition end: if the comparison is the same, generating and returning a message that the vehicle number plate identification verification is successful and the plate is not fake to the acquisition end; and if the comparison is different, generating and returning a vehicle number plate as a fake plate message to the acquisition end.
As an implementation manner, when the collecting end receives the vehicle license plate digital watermark identification failure message or the first cloud digital signature verification failure message sent by the cloud delivery management server, the collecting end informs a vehicle management department to check whether the integrity of the vehicle license plate at the vehicle end is damaged, whether the vehicle license plate is falsified and copied or whether the vehicle license plate is a safe vehicle license plate sent by the vehicle management department;
when the acquisition end receives the information that the vehicle license plate sent by the cloud traffic management server is a fake license plate, the acquisition end informs a vehicle management department or acquisition end equipment to check and process a corresponding vehicle end; the acquisition terminal device comprises but is not limited to a high-speed bayonet device and/or an intelligent robot with a traffic management function and the like.
As an implementation manner, before the collecting end sends the vehicle number plate image and the vehicle identification code to the cloud traffic management server, the collecting end further includes: the collecting end generates a first collecting end digital abstract for the vehicle number plate image and the vehicle identification code, and generates a first collecting end digital signature for the first collecting end digital abstract;
correspondingly, the acquisition end sends the vehicle number plate image, the vehicle identification code and the first acquisition end digital signature to the cloud traffic management server;
correspondingly, before attempting to identify the digital watermark contained in the vehicle license plate image, the cloud traffic management server further includes: the cloud traffic management server generates a second cloud digital abstract according to the received vehicle license plate image and the received vehicle identification code, checks the first acquisition end digital signature, and if the check is successful, judges that the vehicle license plate image and the vehicle identification code sent by the acquisition end are complete and not tampered, and the identity of the acquisition end is real.
As an implementation manner, before any type of message in the cloud return acquisition end messages is returned to the acquisition end by the cloud traffic management server, signing the cloud return acquisition end messages to obtain a second cloud digital signature; then sending the information of the cloud end returned to the acquisition end and the second cloud end digital signature to the acquisition end;
the acquisition end checks the second cloud digital signature based on the received cloud return acquisition end message: if the verification fails, the acquisition end returns a second cloud digital signature verification failure message to the cloud traffic management server; if the signature verification is successful, judging that the information of the cloud return acquisition end sent by the cloud delivery management server is complete and is not tampered, and the identity of the cloud delivery management server is real;
the cloud traffic management server sends a vehicle number plate digital watermark identification failure message, a first cloud digital signature verification failure message, a vehicle number plate identification verification success message and a vehicle number plate non-fake-license message and a vehicle number plate fake-license message returned by the acquisition end to the cloud traffic management server, and the message is called a cloud return acquisition end message.
As an implementation manner, before the vehicle fake-license plate detection is performed based on the safe vehicle number plate, the safe vehicle number plate is generated and installed at the vehicle end; before installing a safe vehicle number plate at a vehicle end, submitting vehicle information of the vehicle end to a vehicle management department and registering; the vehicle information includes, but is not limited to, a vehicle identification code; the specific steps for generating the safe vehicle license plate are as follows:
step A1, planning and designing the image pattern of the common vehicle license plate in advance by a vehicle management department; the vehicle user submits the vehicle information of the vehicle end to be branded to a vehicle management department, selects the specific number of the vehicle license plate and registers; the vehicle information includes a vehicle identification code; the vehicle management department refers to a public security traffic management department, and a specific responsible department takes the provisions of corresponding laws and regulations as the standard;
step A2, the cloud traffic control server generates a common vehicle license plate image according to the information; then, generating a first cloud digital abstract based on the common vehicle license plate image, and then generating a first cloud digital signature based on the first cloud digital abstract and vehicle identification code information corresponding to the vehicle license plate when the vehicle license plate is registered in a vehicle management department;
step A3, the cloud traffic management server generates a first digital watermark by taking the first cloud digital abstract, the vehicle identification code and the first cloud digital signature as parameters, and embeds the first digital watermark into a common vehicle license plate image to generate the safe vehicle license plate image;
step A4, generating a safe vehicle number plate from the safe vehicle number plate image according to the printing and manufacturing specifications of the vehicle number plate by a vehicle management department; then, a safety vehicle number plate is installed on the vehicle end.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A visible light-based vehicle fake-license detecting system is characterized by comprising: the system comprises a cloud traffic management server, at least one acquisition end and at least one vehicle end; the cloud traffic management server comprises a cloud digital watermark module and a cloud detection module; the acquisition end comprises an acquisition end visible light module; the vehicle end comprises a vehicle end visible light module; the acquisition end and the vehicle end carry out visible light communication interaction through the acquisition end visible light module and the vehicle end visible light module;
the acquisition terminal is used for acquiring the vehicle number plate image of the vehicle end in real time and acquiring the vehicle identification code of the vehicle end from the vehicle end;
the cloud digital watermark module is used for identifying and/or extracting the digital watermark embedded in the vehicle license plate image; the digital watermark comprises a first cloud digital abstract of a common vehicle license plate image, a vehicle identification code corresponding to the vehicle license plate when the vehicle license plate is registered in a vehicle management department, and a first cloud digital signature of the first cloud digital abstract and the vehicle identification code;
the high in the clouds detection module is used for verifying based on the digital watermark, vehicle number plate image and vehicle identification code whether the vehicle number plate is legal safe vehicle number plate and whether the vehicle number plate is a fake plate, specifically is:
calling the cloud digital watermark module to try to identify the digital watermark contained in the vehicle license plate image sent by the acquisition end; if the digital watermark identification fails, judging that the vehicle license plate corresponding to the vehicle license plate image is an illegal safe vehicle license plate, and then generating and returning a vehicle license plate digital watermark identification failure message to the acquisition end; if the digital watermark is successfully identified, the cloud detection module extracts digital watermark information contained in the vehicle license plate image to obtain a first cloud digital abstract, a vehicle identification code and a first cloud digital signature; then, checking the first cloud digital signature according to the first cloud digital abstract and the vehicle identification code; if the verification of the signature fails, judging that the vehicle number plate corresponding to the vehicle number plate image is an illegal safe vehicle number plate, and then generating and returning a first cloud digital signature verification failure message to the acquisition end; if the verification is successful, the vehicle number plate image is judged to be a complete and non-tampered vehicle number plate and is a legal and safe vehicle number plate issued by the cloud traffic management server; then comparing the vehicle identification code extracted from the digital watermark with the vehicle identification code sent by the acquisition end, and if the comparison is the same, generating and returning a message that the vehicle number plate identification verification is successful and the plate is not fake to the acquisition end; and if the comparison is different, generating and returning a vehicle number plate as a fake plate message to the acquisition end.
2. The visible-light-based vehicle fake plate detection system of claim 1, wherein the collecting end comprises a camera module and a collecting end processing module;
the camera module is used for shooting the vehicle number plate at the vehicle end in real time to obtain a vehicle number plate image;
the collection end processing module is used for collecting the vehicle number plate image of the vehicle end collected by the camera module and the vehicle identification code information of the vehicle end collected by the collection end visible light module, and communicating with the cloud traffic management server, receiving and sending corresponding information, so that the cloud traffic management server can detect, verify and process the authenticity of the vehicle number plate and check the vehicle identification code.
3. The visible light-based vehicle fake plate detection system according to claim 1, wherein the collection end visible light module specifically comprises a collection end visible light control unit, a collection end visible light emitting unit and a collection end visible light receiving unit; the vehicle-end visible light module comprises a vehicle-end visible light control unit, a vehicle-end visible light emitting unit and a vehicle-end visible light receiving unit;
the acquisition end visible light control unit is used for converting an electric signal of information required to be sent by the acquisition end into an optical signal for the acquisition end visible light emitting unit to emit outwards, and converting the optical signal received by the acquisition end visible light receiving unit into an electric signal for the acquisition end to use;
the vehicle-end visible light control unit is used for converting an electric signal of information required to be sent by the vehicle end into an optical signal for the vehicle-end visible light emitting unit to emit outwards, and converting the optical signal received by the vehicle-end visible light receiving unit into the electric signal for the vehicle end to use.
4. The visible-light-based vehicle fake plate detection system of claim 1, wherein the cloud traffic management server further comprises a cloud security module, the collection end further comprises a collection end security module, and the vehicle end further comprises a vehicle end security module;
the cloud end safety module, the acquisition end safety module and the vehicle end safety module are respectively used for providing a password service function and a safety storage function for the cloud end traffic management server, the acquisition end and the vehicle end;
the vehicle end is characterized in that the vehicle identification code of the vehicle end is arranged in the safe storage area of the vehicle end safety module before the vehicle leaves a factory by a vehicle production party, the vehicle identification code is arranged in the safe storage area of the vehicle end safety module, and only a read-only function is provided, so that the vehicle identification code arranged in the safe storage area of the vehicle end safety module cannot be changed by a vehicle using party.
5. The visible-light-based vehicle fake-license detection system of claim 4, wherein the cloud detection module further comprises a digital certificate module;
the digital certificate module is used for generating and storing public key certificates for the cloud traffic management server and the acquisition end respectively; the digital certificate module writes the public key certificate of the acquisition end and the public key certificate of the cloud traffic management server into the acquisition end safety module in an off-line or on-line mode; the cloud traffic management server and the acquisition end respectively store private keys corresponding to public keys in corresponding public key certificates; the private key of the cloud traffic management server is stored in the digital certificate module or the safe storage area of the cloud safety module; and the private key of the acquisition end is stored in the safe storage area of the acquisition end safety module.
6. The visible-light-based vehicle fake-license detection system of claim 2, wherein the collection end further comprises a collection end positioning module;
the acquisition end positioning module is used for acquiring the position information of the acquisition end;
correspondingly, the collecting end processing module is further configured to collect the position information of the collecting end obtained from the collecting end positioning module and the time information of the collecting end when the collecting end collects the vehicle number plate image, the vehicle identification code and the position information of the collecting end, and send the vehicle number plate image, the vehicle identification code, the position information of the collecting end and the time information to the cloud traffic management server;
correspondingly, the cloud traffic management server is further used for carrying out vehicle positioning, vehicle tracking and/or vehicle management according to the vehicle number plate image, the vehicle identification code, the position information of the acquisition end and the time information.
7. The visible-light-based vehicle fake plate detection system of claim 2, wherein the camera module comprises a first camera, a second camera, a third camera, a vehicle number plate identification module, a vehicle number plate synthesis module, a light sensing module and a light supplementing module;
the first camera is used for collecting real-time video information of the vehicle end and has an infrared camera shooting function;
the second camera is a long-focus camera and is used for photographing the vehicle number plate at the vehicle end;
the third camera is a wide-angle camera and is used for photographing the vehicle number plate at the vehicle end;
the vehicle license plate recognition module is used for recognizing the video information collected by the first camera in real time, and calling the second camera and the third camera to photograph the vehicle license plate if a vehicle license plate image is recognized in the video information;
the vehicle license plate synthesizing module is used for calculating and synthesizing the vehicle license plate images shot by the second camera and the third camera respectively to obtain clear and high-quality vehicle license plate images;
the light sensing module is used for sensing whether the intensity of light is proper or not when the second camera and the third camera take a picture, and then calling the light supplementing module to supplement light according to the requirement;
and the light supplementing module is used for supplementing light when the second camera and the third camera take photos.
8. A visible light-based vehicle fake plate detection method is characterized by comprising the following steps:
step 1: the method comprises the steps that a collecting end collects a vehicle number plate image of a vehicle end in real time, a vehicle identification code of the vehicle end is obtained from the vehicle end through a visible light module of the collecting end, and the vehicle number plate image and the vehicle identification code are sent to a cloud traffic management server;
step 2: after receiving the vehicle license plate image and the vehicle identification code, the cloud traffic management server tries to identify the digital watermark contained in the vehicle license plate image: if the digital watermark identification fails, the vehicle number plate corresponding to the vehicle number plate image is judged to be an illegal safe vehicle number plate, and the cloud traffic management server generates and returns a vehicle number plate digital watermark identification failure message to the acquisition end; if the digital watermark is successfully identified, the cloud traffic management server extracts the digital watermark contained in the vehicle license plate image, and a first cloud digital abstract, a vehicle identification code and a first cloud digital signature are obtained from the digital watermark;
and step 3: the cloud traffic management server checks the first cloud digital signature acquired from the digital watermark according to the first cloud digital abstract and the vehicle identification code acquired from the digital watermark: if the signature verification fails, judging that the vehicle number plate corresponding to the vehicle number plate image is an illegal safe vehicle number plate, and generating and returning a first cloud digital signature verification failure message to the acquisition end; if the verification is successful, the vehicle number plate image is judged to be a complete and non-tampered vehicle number plate and is a legal and safe vehicle number plate issued by the cloud traffic management server;
and 4, step 4: the cloud traffic management server compares the vehicle identification code obtained from the digital watermark with the vehicle identification code sent by the acquisition end: if the comparison is the same, generating and returning a message that the vehicle number plate identification verification is successful and the plate is not fake to the acquisition end; and if the comparison is different, generating and returning a vehicle number plate as a fake plate message to the acquisition end.
9. The method for detecting the fake license plate of the vehicle based on the visible light of claim 8, wherein before the collecting end sends the image of the license plate of the vehicle and the vehicle identification code to the cloud traffic management server, the method further comprises: the collecting end generates a first collecting end digital abstract for the vehicle number plate image and the vehicle identification code, and generates a first collecting end digital signature for the first collecting end digital abstract;
correspondingly, the acquisition end sends the vehicle number plate image, the vehicle identification code and the first acquisition end digital signature to the cloud traffic management server;
correspondingly, before attempting to identify the digital watermark contained in the vehicle license plate image, the cloud traffic management server further includes: the cloud traffic management server generates a second cloud digital abstract according to the received vehicle number plate image and the received vehicle identification code, checks the first acquisition end digital signature, and if the check is successful, judges that the vehicle number plate image and the vehicle identification code sent by the acquisition end are complete and not tampered, and the identity of the acquisition end is real.
10. The visible light-based vehicle fake plate detection method according to claim 9, further comprising:
the cloud traffic management server signs the information of the cloud return acquisition end before returning any type of information in the information of the cloud return acquisition end to the acquisition end to obtain a second cloud digital signature; then sending the information of the cloud end returned to the acquisition end and the second cloud end digital signature to the acquisition end;
the acquisition end checks the second cloud digital signature based on the received cloud return acquisition end message: if the verification fails, the acquisition end returns a second cloud digital signature verification failure message to the cloud traffic management server; if the signature verification is successful, judging that the information of the cloud return acquisition end sent by the cloud delivery management server is complete and is not tampered, and the identity of the cloud delivery management server is real;
the cloud traffic management server sends a vehicle number plate digital watermark identification failure message, a first cloud digital signature verification failure message, a vehicle number plate identification verification success message and a vehicle number plate non-fake-license message and a vehicle number plate fake-license message returned by the acquisition end to the cloud traffic management server, and the message is called a cloud return acquisition end message.
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