CN112712706B - License plate recognition method - Google Patents
License plate recognition method Download PDFInfo
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- CN112712706B CN112712706B CN202011537736.4A CN202011537736A CN112712706B CN 112712706 B CN112712706 B CN 112712706B CN 202011537736 A CN202011537736 A CN 202011537736A CN 112712706 B CN112712706 B CN 112712706B
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/017—Detecting movement of traffic to be counted or controlled identifying vehicles
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F18/00—Pattern recognition
- G06F18/20—Analysing
- G06F18/22—Matching criteria, e.g. proximity measures
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/40—Extraction of image or video features
- G06V10/56—Extraction of image or video features relating to colour
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
- G06V30/10—Character recognition
- G06V30/14—Image acquisition
- G06V30/148—Segmentation of character regions
- G06V30/153—Segmentation of character regions using recognition of characters or words
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/017—Detecting movement of traffic to be counted or controlled identifying vehicles
- G08G1/0175—Detecting movement of traffic to be counted or controlled identifying vehicles by photographing vehicles, e.g. when violating traffic rules
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/60—Type of objects
- G06V20/62—Text, e.g. of license plates, overlay texts or captions on TV images
- G06V20/625—License plates
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- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Vision & Pattern Recognition (AREA)
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- Bioinformatics & Computational Biology (AREA)
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Abstract
The invention discloses a license plate recognition method, which comprises the following steps: the vehicle recognition device collects physical license plate information and electronic license plate information; the physical license plate information and the electronic license plate information at least comprise license plate numbers; judging whether the physical license plate information and the electronic license plate information are completely matched; if so, determining that the vehicle is a legal vehicle; if not, judging whether the characters within two are not matched with each other in the physical license plate information and the electronic license plate information; if not, determining that the vehicle is an illegal vehicle; if so, determining whether the license plate is a legal vehicle or not according to the lane information and the vehicle color. Therefore, the invention can discriminate whether the license plate of the non-motor vehicle is tampered, smeared or shielded and the like by combining the video technology and the RFID technology, and provides a more efficient means for urban traffic safety to monitor the running of the non-motor vehicle.
Description
Technical Field
The invention relates to the technical field of vehicle management, in particular to a license plate recognition method.
Background
With the rapid development of urban traffic in China, the number of non-motor vehicles is increased explosively, and violation behaviors often occur in the driving process of the non-motor vehicles, so that the traffic pressure is higher and higher, therefore, the maintenance of urban road traffic safety and the guarantee of safe passage of people are extremely important tasks and targets of the society, and the supervision requirements on urban passage of non-motor vehicles and driving behaviors are very urgent.
In the prior art, driving behaviors of non-motor vehicles are generally monitored and recognized based on a video recognition technology, but the sizes, fonts and the like of the license plates of the non-motor vehicles in various cities are not unified, and the sizes of the license plates of the non-motor vehicles are generally relatively small, so that the difficulty in recognizing the license plates of the non-motor vehicles through the video technology is high, the recognition error rate is high, and the problems of tampering, smearing, shielding and the like of the license plates cannot be accurately determined.
Based on this, how to accurately identify the vehicle information of the non-motor vehicle, improve the identification rate, solve the problems of tampering, smearing, shielding and the like of the license plate of the non-motor vehicle, and realize the judgment of the illegal behaviors of the non-motor vehicle is a problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
The invention provides a license plate recognition method, which can accurately recognize vehicle information of a non-motor vehicle, improve the recognition rate, solve the problems of tampering, smearing, shielding and the like of the license plate of the non-motor vehicle and realize the judgment of illegal behaviors of the non-motor vehicle.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
in a first aspect, an embodiment of the present invention provides a license plate identification method, including: the vehicle recognition device collects physical license plate information and electronic license plate information; the physical license plate information and the electronic license plate information at least comprise license plate numbers;
judging whether the physical license plate information and the electronic license plate information are completely matched;
if so, determining that the vehicle is a legal vehicle;
if not, judging whether the characters within two are not matched with each other in the physical license plate information and the electronic license plate information;
if not, determining that the vehicle is an illegal vehicle;
if so, determining whether the license plate is a legal vehicle or not according to the lane information and the vehicle color.
Optionally, in the embodiment of the present invention, determining whether the license plate is a legal vehicle according to the lane information and the vehicle color specifically includes:
the physical license plate information and the electronic license plate information further comprise lane information and vehicle colors;
judging whether the lane information and the vehicle color in the physical license plate information are completely matched with the lane information and the vehicle color in the electronic license plate information;
if so, determining that the vehicle is a legal vehicle;
if not, determining that the vehicle is an illegal vehicle.
Optionally, in an embodiment of the present invention, the vehicle identification device is configured as a video and radio frequency integrated machine.
Optionally, in an embodiment of the present invention, the video and radio frequency all-in-one machine includes a video identification module and a radio frequency identification module;
the video recognition module captures a license plate of the non-motor vehicle;
and the radio frequency identification module sends a radio frequency tag to the electronic license plate of the non-motor vehicle so that a reader can read the electronic license plate information.
Optionally, in an embodiment of the present invention, the video identification module includes a camera and a processor;
the camera captures the license plate to form a license plate image, and the processor processes the license plate image and extracts the physical license plate information.
Optionally, in an embodiment of the present invention, the video and radio frequency integrated machine is disposed on an electronic police tower.
Optionally, in an embodiment of the present invention, the reader is disposed on a traffic light bar frame.
In a second aspect, an embodiment of the present invention provides a license plate recognition apparatus, including:
the acquisition module is used for acquiring physical license plate information and electronic license plate information by the vehicle identification device;
the judging module is used for judging whether the physical license plate information and the electronic license plate information are completely matched; if so, determining that the vehicle is a legal vehicle; if not, judging whether the characters within two are not matched with each other in the physical license plate information and the electronic license plate information; if not, determining that the vehicle is an illegal vehicle; if so, determining whether the license plate is an illegal vehicle according to the lane information and the vehicle color.
The invention has the advantages and positive effects that:
firstly, in the invention, when the physical license plate information and the electronic license plate information are not completely matched, whether the license plate is a legal vehicle can be determined through the lane information and the vehicle color, and specifically, when the lane information in the physical license plate information is completely matched with the vehicle color and the lane information in the electronic license plate information is completely matched with the vehicle color, the vehicle is determined to be a legal vehicle; otherwise, determining that the vehicle is an illegal vehicle. Therefore, the situation that the physical license plate information and the electronic license plate are not completely matched due to inaccurate physical license plate information acquired by the video and radio frequency integrated machine is avoided, and the matching accuracy is improved.
Secondly, by arranging the video recognition module of the video and radio frequency integrated machine, the license plate information of the non-motor vehicle can be captured, whether illegal behaviors exist in driving personnel can be monitored, and specifically, whether the non-motor vehicle occupies a motor vehicle lane, runs reversely, runs in violation of a signal lamp and does not wear a helmet and other illegal behaviors can be recognized.
And thirdly, by arranging the radio frequency identification module of the video and radio frequency integrated machine, the electronic license plate information can be acquired, the vehicle can be positioned, and the real-time monitoring of the vehicle is realized.
Fourthly, the invention can discriminate whether the license plate of the non-motor vehicle is falsified, smeared or shielded and the like through the combination of the video technology and the RFID technology, and provides a more efficient means for the urban traffic safety to the running supervision of the non-motor vehicle.
Drawings
FIG. 1 is a flow chart of a license plate recognition method according to the present invention;
fig. 2 is a schematic structural diagram of a license plate recognition device provided in the present invention.
Detailed Description
The description of the present invention referring to "first", "second", etc. is for descriptive purposes only, not specifically referring to the sequential or chronological meanings, but also not for limiting the present invention, and it is only for distinguishing the components or operations described in the same technical terms, and it is not to be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated, whereby the features defined as "first", "second", etc. may explicitly or implicitly include at least one of the features.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
The embodiments of the invention will be described in further detail below with reference to the accompanying drawings:
the license plate recognition method provided by the invention is shown in fig. 1 and comprises the following steps: the vehicle recognition device collects physical license plate information and electronic license plate information; the physical license plate information and the electronic license plate information at least comprise license plate numbers;
judging whether the physical license plate information and the electronic license plate information are completely matched;
if so, determining that the vehicle is a legal vehicle;
if not, judging whether the characters within two are not matched with each other in the physical license plate information and the electronic license plate information;
if not, determining that the vehicle is an illegal vehicle;
if so, determining whether the license plate is a legal vehicle or not according to the lane information and the vehicle color.
Therefore, the invention can discriminate whether the license plate of the non-motor vehicle is tampered, smeared or shielded and the like by combining the video technology and the RFID technology, and provides a more efficient means for urban traffic safety to monitor the running of the non-motor vehicle.
Optionally, in the embodiment of the present invention, determining whether the license plate is a legal vehicle according to the lane information and the vehicle color specifically includes:
the physical license plate information and the electronic license plate information further comprise lane information and vehicle colors;
judging whether the lane information and the vehicle color in the physical license plate information are completely matched with the lane information and the vehicle color in the electronic license plate information;
if so, determining that the vehicle is a legal vehicle;
if not, determining that the vehicle is an illegal vehicle.
It should be noted that, when the radio frequency integrated machine is used for collecting physical license plate information, there may be inaccuracy of the collected physical license plate information due to weather, for example, in rainy days, the physical license plate information (for example, jing P5B 958) is recognized incorrectly due to dark light, and the recognized physical license plate information is jing P5B95B, that is, the last character of the physical license plate information is recognized incorrectly (i.e., "8" is recognized as "B"), however, in practical cases, the physical license plate information and the electronic license plate information of the vehicle are matched. Therefore, the physical license plate information acquired by the radio frequency integrated machine is inaccurate, so that the physical license plate information and the electronic license plate are not completely matched, at the moment, whether the vehicle is a legal vehicle can be determined according to the lane information and the vehicle color, and when the lane information in the physical license plate information is completely matched with the lane information in the vehicle color and the vehicle color in the electronic license plate information, the vehicle is determined to be a legal vehicle; otherwise, determining that the vehicle is an illegal vehicle. Therefore, the situation that the physical license plate information and the electronic license plate are not completely matched due to inaccurate physical license plate information acquired by the video and radio frequency integrated machine is avoided, and the matching accuracy is improved.
When there is character mismatch within two between the physical license plate information and the electronic license plate information, the following two situations can be referred to:
the first condition is as follows: the actual physical license plate information is Jing P5B958, and the physical license plate information collected by the radio frequency integrated machine is Jing P5B95B, that is, the physical license plate information and the electronic license plate information have a character mismatch;
case two: the actual physical license plate information is Jing P5B958, and the physical license plate information collected by the radio frequency all-in-one machine is Jing P5895B, that is to say, the physical license plate information and the electronic license plate information have a character mismatch.
In summary, when the first condition and the second condition occur, in the present invention, it is necessary to continuously determine whether the lane information and the vehicle color are the same, where the physical license plate information and the electronic license plate information further include the lane information and the vehicle color, which can be specifically referred to in the following.
For example, when the lane information of the physical license plate information is lane 1 and the color of the vehicle is black, and when the lane information of the electronic license plate information is lane 1 and the color of the vehicle is black, it may be determined that the vehicle is a legal vehicle;
it should be noted that, as long as the lane information and the vehicle color are not completely matched, in the present invention, it is also necessary to determine whether the vehicle types are matched, where the physical license plate information and the electronic license plate information also include vehicle type information.
For example two, when the lane information of the physical license plate information is lane 2 and the vehicle color is black, and when the lane information of the electronic license plate information is lane 1 and the vehicle color is black, or when the lane information of the physical license plate information is lane 3 and the vehicle color is black, and when the lane information of the electronic license plate information is lane 3 and the vehicle color is white, that is, the lane information and the vehicle color are not completely matched, it is also necessary to determine whether the vehicle types are matched.
Specifically, when the vehicle type (for example, non-motor vehicle) in the physical license plate information and the vehicle type (for example, non-motor vehicle) in the electronic license plate information match, it may be determined that the vehicle is a legal vehicle; when the vehicle type (for example, non-motor vehicle) in the physical license plate information and the vehicle type (for example, motor vehicle) in the electronic license plate information do not match, the vehicle can be determined to be illegal.
Optionally, in the embodiment of the present invention, the vehicle identification device is configured as a video-radio integrated machine.
Therefore, physical license plate information and electronic license plate information can be collected through the radio frequency integrated machine, other vehicle identification devices are not required to be added, the cost is reduced, and the practicability is high.
Optionally, in the embodiment of the present invention, the video and radio frequency all-in-one machine includes a video identification module and a radio frequency identification module;
the video recognition module captures a license plate of the non-motor vehicle;
and the radio frequency identification module sends a radio frequency tag to the electronic license plate of the non-motor vehicle so that a reader can read the electronic license plate information.
Therefore, the electronic license plate information is determined, and the subsequent matching of the electronic license plate information and the physical license plate information is facilitated.
Optionally, in an embodiment of the present invention, the video identification module includes a camera and a processor;
the camera captures the license plate to form a license plate image, and the processor processes the license plate image and extracts the physical license plate information.
Therefore, whether the physical license plate information is accurate or not is convenient to determine subsequently.
Optionally, in the embodiment of the present invention, the radio-frequency integrated machine is disposed on an electronic police pole frame.
Optionally, in an embodiment of the present invention, the reader is disposed on a traffic light bar frame.
Therefore, the radio frequency integrated machine is arranged on the electronic police pole frame, the reader is arranged on the traffic light pole frame, and a certain distance is reserved between the electronic police pole frame and the traffic light pole frame, so that physical license plate information and electronic license plate information are collected through the radio frequency integrated machine, the problem that whether license plates of non-motor vehicles are smeared or not can be determined, the driving speed of the non-motor vehicles within a period of time can be determined, and the problem that the non-motor vehicles are overspeed or not can be determined.
Based on the same inventive concept, embodiments of the present invention provide a license plate recognition apparatus, an implementation principle of the apparatus is similar to that of the aforementioned license plate recognition method, and reference may be made to the above-mentioned implementation manner of the license plate recognition method specifically, and repeated details are not repeated.
Specifically, as shown in fig. 2, the license plate recognition device provided in the embodiment of the present invention may include:
the acquisition module 201 is used for acquiring physical license plate information and electronic license plate information by a vehicle identification device;
the judging module 201 is configured to judge whether the physical license plate information and the electronic license plate information are completely matched; if so, determining that the vehicle is a legal vehicle; if not, judging whether the characters within two are not matched with each other in the physical license plate information and the electronic license plate information; if not, determining that the vehicle is an illegal vehicle; if so, determining whether the license plate is a illegal vehicle or not according to the lane information and the vehicle color.
It should be emphasized that the embodiments described herein are illustrative rather than restrictive, and thus the present invention is not limited to the embodiments described in the detailed description, but other embodiments derived from the technical solutions of the present invention by those skilled in the art are also within the scope of the present invention.
Claims (7)
1. A license plate recognition method is characterized by comprising the following steps:
the vehicle recognition device collects physical license plate information and electronic license plate information; the physical license plate information and the electronic license plate information at least comprise license plate numbers;
judging whether the physical license plate information and the electronic license plate information are completely matched;
if so, determining that the vehicle is a legal vehicle;
if not, judging whether the characters within two are not matched with each other in the physical license plate information and the electronic license plate information;
if not, determining that the vehicle is an illegal vehicle;
if yes, determining whether the license plate is a legal vehicle or not according to the lane information and the vehicle color;
whether the license plate is a legal vehicle is determined through the lane information and the vehicle color, and the method specifically comprises the following steps:
the physical license plate information and the electronic license plate information further comprise lane information and vehicle colors;
judging whether the lane information and the vehicle color in the physical license plate information are completely matched with the lane information and the vehicle color in the electronic license plate information;
if so, determining that the vehicle is a legal vehicle;
if not, determining that the vehicle is an illegal vehicle.
2. The method of claim 1, wherein the vehicle identification device is configured as a video-radio integrated machine.
3. The method for recognizing the license plate of claim 2, wherein the video and radio frequency all-in-one machine comprises a video recognition module and a radio frequency recognition module;
the video recognition module captures a license plate of the non-motor vehicle;
and the radio frequency identification module sends a radio frequency tag to the electronic license plate of the non-motor vehicle so that a reader can read the electronic license plate information.
4. The method for recognizing the license plate of claim 3, wherein the video recognition module comprises a camera and a processor;
the camera captures the license plate to form a license plate image, and the processor processes the license plate image and extracts the physical license plate information.
5. The method of claim 4, wherein the video and radio frequency integrated machine is arranged on an electronic police stand.
6. The method of claim 3, wherein the reader is disposed on a traffic light bar.
7. A recognition apparatus for a license plate, comprising:
the acquisition module is used for acquiring physical license plate information and electronic license plate information by the vehicle identification device; the physical license plate information and the electronic license plate information at least comprise license plate numbers;
the judging module is used for judging whether the physical license plate information and the electronic license plate information are completely matched; if so, determining that the vehicle is a legal vehicle; if not, judging whether the characters within two are not matched with each other in the physical license plate information and the electronic license plate information; if not, determining that the vehicle is an illegal vehicle; if yes, determining whether the license plate is a legal vehicle or not according to the lane information and the vehicle color; the physical license plate information and the electronic license plate information further comprise lane information and vehicle colors; judging whether the lane information and the vehicle color in the physical license plate information are completely matched with the lane information and the vehicle color in the electronic license plate information; if so, determining that the vehicle is a legal vehicle; if not, determining that the vehicle is an illegal vehicle.
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| CN202011537736.4A CN112712706B (en) | 2020-12-23 | 2020-12-23 | License plate recognition method |
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| CN202011537736.4A CN112712706B (en) | 2020-12-23 | 2020-12-23 | License plate recognition method |
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| CN112712706B true CN112712706B (en) | 2022-06-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113936348A (en) * | 2021-12-17 | 2022-01-14 | 高新兴智联科技有限公司 | Automobile operation service method, system, electronic equipment and storage medium |
| CN115359665A (en) * | 2022-08-17 | 2022-11-18 | 北京博宏科元信息科技有限公司 | Multichannel violation vehicle recording method and device based on radio frequency video all-in-one machine |
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Address after: Room 401, building 12, East Airport Business Park, 80 Huanhe North Road, Tianjin pilot free trade zone (Airport Economic Zone), Binhai New Area, Tianjin Patentee after: Zte Intelligent Iot Technology Co.,Ltd. Address before: Room 401, building 12, East Airport Business Park, 80 Huanhe North Road, Tianjin pilot free trade zone (Airport Economic Zone), Binhai New Area, Tianjin Patentee before: Gaoxing Zhilian Technology Co.,Ltd. |
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