CN111524360A - Embedded license plate identification and screening system and control method thereof - Google Patents
Embedded license plate identification and screening system and control method thereof Download PDFInfo
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- CN111524360A CN111524360A CN202010315016.7A CN202010315016A CN111524360A CN 111524360 A CN111524360 A CN 111524360A CN 202010315016 A CN202010315016 A CN 202010315016A CN 111524360 A CN111524360 A CN 111524360A
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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
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/40—Scenes; Scene-specific elements in video content
- G06V20/41—Higher-level, semantic clustering, classification or understanding of video scenes, e.g. detection, labelling or Markovian modelling of sport events or news items
- G06V20/42—Higher-level, semantic clustering, classification or understanding of video scenes, e.g. detection, labelling or Markovian modelling of sport events or news items of sport video content
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/50—Context or environment of the image
- G06V20/56—Context or environment of the image exterior to a vehicle by using sensors mounted on the vehicle
- G06V20/58—Recognition of moving objects or obstacles, e.g. vehicles or pedestrians; Recognition of traffic objects, e.g. traffic signs, traffic lights or roads
- G06V20/584—Recognition of moving objects or obstacles, e.g. vehicles or pedestrians; Recognition of traffic objects, e.g. traffic signs, traffic lights or roads of vehicle lights or traffic lights
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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
- G08G1/0175—Detecting movement of traffic to be counted or controlled identifying vehicles by photographing vehicles, e.g. when violating traffic rules
Abstract
An embedded license plate identification and screening system comprises a shell unit, a camera unit, a sending unit and a processing unit, wherein the shell unit is embedded in the ground, the camera unit is arranged in the shell unit and used for shooting real-time images, the sending unit is used for receiving license plate certificate photos and sending the license plate certificate photos to external equipment, and the processing unit is used for receiving the real-time images in a streaming mode. The processing unit comprises a control module, wherein the control module is used for capturing the picture of the real-time image as a temporary certificate photo, screening out a license plate part according to the license plate outline in the temporary certificate photo, storing the license plate part as the license plate certificate photo and transmitting the license plate part to the sending unit. The invention has the effect that when the license plate is buried in the ground and the real-time image is shot upwards in order to reduce the volume, only the photos of the license plate part can be screened out, so that the purpose of protecting the privacy of other people is achieved.
Description
Technical Field
The present invention relates to a license plate recognition system, and more particularly, to an embedded license plate recognition and screening system and a control method thereof.
Background
In recent years, the technology has been developed rapidly, and the sensors are used to detect vehicles and record the pictures, so as to gradually replace the conventional method of taking pictures and recording the parking time by manpower.
Referring to fig. 1, a license plate recognition system disclosed in taiwan patent No. TW I626624B includes a first timing post 11 and a second timing post 12, wherein the first timing post 11 is disposed at a long side of a first parking space 110, the second timing post 12 is disposed at a long side of a second parking space 120, and the second parking space 120 is located in front of the first parking space 110.
The first timing post 11 includes a first front compartment sensor 111 for detecting the second parking compartment 120, and a first camera unit 112 for capturing the first parking compartment 110. Similarly, the second timing post 12 includes a second front space sensor 121 for detecting a parking space in front, and a second camera unit 122 for capturing an image of the second parking space 120. When the first front space sensor 111 in the first timing post 11 senses that the second parking space 120 has the moving object entering, the second camera unit 122 of the second timing post 12 turns on and shoots the vehicle in the second parking space 120 to calculate the parking fee of the vehicle in the second parking space 120.
However, according to the existing license plate recognition system, each timing post needs to include a front parking space sensor and a camera, when the number of parking spaces to be monitored is increased, the cost for constructing the license plate recognition system is increased, and the timing post is arranged beside the parking spaces and occupies the space of a part of roads, thereby indirectly shielding pedestrians or driving sight lines.
Disclosure of Invention
The invention aims to provide an embedded license plate identification screening system capable of solving the defects of the existing license plate identification system and a control method thereof.
The embedded license plate identification and screening system is suitable for external equipment, and comprises a shell unit, a camera unit, a sending unit and a processing unit, wherein the shell unit is used for being arranged and embedded in the ground, the camera unit is arranged in the shell unit and is used for shooting real-time images obliquely upwards, the sending unit is used for receiving license plate certificate photos and sending the license plate certificate photos to the external equipment, and the processing unit is electrically connected with the camera unit and is used for receiving the real-time images in a streaming mode.
The processing unit comprises a control module, the control module captures the picture of the real-time image as a temporary certificate photo, screens and captures a license plate part according to the license plate outline in the temporary certificate photo, stores the photo of the license plate part as the license plate certificate photo and transmits the license plate certificate photo to the sending unit.
The embedded license plate identification and screening system also comprises a sensing unit electrically connected with the camera unit, and when an object moves in a detection range of the sensing unit, the control module captures a picture of the real-time image as the temporary certificate photo.
In the embedded license plate identification and screening system, the processing unit further comprises a register electrically connected with the camera unit and used for receiving the real-time images transmitted by the camera unit in a streaming mode.
According to the embedded license plate identification and screening system, the control module detects whether an object moves in the picture of the real-time image according to the picture of the real-time image, and if the control module detects that the object moves in the picture of the real-time image, the control module captures the picture of the real-time image as the temporary certificate photo.
According to the embedded license plate identification and screening system, the control module detects whether an object moves in a specific area in the real-time image according to the picture of the real-time image, and if the object moves in the specific area, the control module captures the picture of the real-time image and stores the picture as the temporary certificate photo.
According to the embedded license plate identification and screening system, the control module identifies the license plate number according to the temporary voucher photo, screens and extracts the license plate part according to the license plate outline in the temporary voucher photo, and if the control module cannot read the license plate number from the temporary voucher photo, the control module transmits a license plate abnormal signal to the sending unit.
According to the embedded license plate identification and screening system, the control module screens and extracts a license plate part according to the license plate outline in the temporary certificate photo, and deletes the temporary certificate photo after the license plate part is stored as the license plate certificate photo.
According to the embedded license plate identification and screening system, the control module judges the current time of the license plate number in the temporary certificate photo identified by the control module according to the real-time image, the current time is stored as a time parameter, the license plate certificate photo and the time parameter are transmitted to the sending unit, and the sending unit sends the license plate certificate photo and the time parameter to the external equipment.
The control method of the embedded license plate identification and screening system is suitable for external equipment, the embedded license plate identification and screening system comprises a camera unit, a processing unit electrically connected with the camera unit and a sending unit electrically connected with the processing unit, and the control method comprises the following steps: (A) starting the camera shooting unit, shooting a real-time image and transmitting the real-time image to the processing unit in a streaming mode, (B) capturing a picture of the real-time image as a temporary certificate photo by a control module in the processing unit, (C) screening and capturing a license plate part according to a license plate outline in the temporary certificate photo by the control module, storing the photo of the license plate part as the license plate certificate photo, and transmitting the license plate certificate photo to the transmitting unit, and (D) receiving the license plate certificate photo by the transmitting unit and transmitting the license plate certificate photo to the external equipment.
In the step (A), the camera unit is started, and the real-time images are shot and transmitted to the register in a streaming mode.
The control method of the embedded license plate identification and screening system also comprises a step (E) between the step (B) and the step (C), wherein in the step (E), the control module identifies the license plate number according to the temporary voucher photo, if the control module reads the license plate number from the temporary voucher photo, the step (C) is continued, and if the control module cannot read the license plate number from the temporary voucher photo, the temporary voucher photo is deleted, and a license plate abnormal signal is transmitted to the sending unit.
The control method of the embedded license plate identification and screening system further comprises a step (F) between the step (A) and the step (B), wherein in the step (F), the control module detects the picture of the real-time image and judges whether an object moves in the picture of the real-time image, and if the object moves in the picture of the real-time image, the step (B) is continued.
In the step (F), the control module detects a specific area in the real-time image, and determines whether an object moves in the specific area, if the specific area is detected to have the object move, the step (B) is continued, and in the step (B), the control module captures a picture of the real-time image as the temporary certificate photo.
The control method of the embedded license plate identification and screening system further comprises a step (G) between the step (C) and the step (D), wherein in the step (G), the control module deletes the temporary certificate photo.
The control method of the embedded license plate recognition screening system further comprises a step (H) between the step (B) and the step (C), in the step (H), the control module judges the current time that the control module identifies the license plate number in the temporary certificate photo according to the real-time image and stores the current time as a time parameter, in the step (C), the control module screens and captures a license plate part according to the license plate outline in the temporary certificate photo, stores the license plate part as the license plate certificate photo, and transmits the license plate certificate photo and the time parameter to the sending unit, in the step (D), the sending unit receives the license plate voucher photo and the time parameter, and sends the license plate voucher photo and the time parameter to the external device.
The embedded license plate identification and screening system and the control method thereof have the effects that: the shell unit, the camera shooting unit, the processing unit and the sending unit are integrated to form a license plate identification and screening system buried in the ground, photos of a license plate part are captured and screened to serve as the license plate certificate photos, and only the license plate certificate photos are transmitted to external equipment through the sending unit, so that the photos outside the license plate part are prevented from flowing outwards, and the effects of reducing the size and protecting the privacy of other people are achieved.
Drawings
Other features and effects of the present invention will become apparent from the following detailed description of the embodiments with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a license plate recognition system of the prior art;
FIG. 2 is a block diagram of an embedded license plate recognition screening system according to an embodiment of the present invention;
FIG. 3 is a schematic view of the embodiment;
FIG. 4 is a schematic diagram of a picture of the live photography in the embodiment; and
fig. 5 is a flowchart of the control method of the embodiment.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Referring to fig. 2 and 3, an embodiment of the embedded license plate recognition and screening system 2 of the present invention includes a housing unit 3 disposed and embedded on the ground, a camera unit 4 disposed in the housing unit 3, a sensing unit 41 electrically connected to the camera unit 4, a sending unit 5, and a processing unit 6, where the processing unit 6 includes a register 61 and a control module 62.
In this embodiment, the camera unit 4 is a camera, and faces a corresponding parking space 92 obliquely upward, and the camera unit 4 is used for taking a real-time image.
In this embodiment, the sensing unit 41 is configured to set an electronic fence in the real-time image for dynamic detection by the control module 62 in the processing unit 6, so as to determine whether an object enters the parking space 92.
In this embodiment, the sending unit 5 is a wireless communication chipset, and the wireless communication chipset receives a license plate certificate photo transmitted by the processing unit 6 and sends the license plate certificate photo to the external device 91 through a wireless network.
In this embodiment, the processing unit 6 is a microprocessor, and the microprocessor includes the register 61 and the control module 62 electrically connected to the camera unit 4. The register 61 receives the live image captured by the image capturing unit 4 in a streaming manner.
In this embodiment, the external device 91 is a neighborhood server, can be matched with a plurality of embedded license plate recognition and screening systems 2 of the present invention, and stores the license plate certificate photos and the time parameters transmitted by each system into a corresponding electronic management window in the neighborhood server, so as to calculate the parking fee.
Referring to fig. 4 and 5, the embodiment of the embedded license plate recognition and screening system 2 of the present invention can be implemented by a control method, where the control method includes steps 701 to 708:
in step 701, the camera unit 4 is activated to capture the live image and transmit the live image to the register 61 in a streaming manner, and the register 61 transmits the live image to the control module 62, and then step 702 is continued.
In step 702, the control module 62 detects a frame of the real-time image according to whether the real-time image in the register 61 is consistent or not, and determines whether an object moves on a frame of a specific area 621 corresponding to the electronic fence in the real-time image, where the specific area 621 is a range of the object that the control module 62 needs to detect to move, so as to reduce an amount of computation required for detecting the object to move. If the control module 62 detects that there is an object moving in the frame of the specific area 621, go to step 703, and if the control module 62 does not detect that the object moving in the frame of the specific area 621, go to step 702 again.
In step 703, the control module 62 captures frames of the real-time image for a plurality of times according to a preset interval, compares and selects a clearer one from the frames of the real-time image captured for a plurality of times, and stores the clearer one as a temporary voucher photo, and the control module 62 also stores the current time for accessing the temporary voucher photo as a time parameter, and continues with step 704.
In step 704, the control module 62 compares and determines whether the temporary voucher photo contains a license plate number according to the english font, the digital font and the arrangement space used by the universal license plate, and if the control module 62 reads the license plate number from the temporary voucher photo, step 705 follows. If the control module 62 cannot recognize that the picture of the specific area 621 contains the license plate number, if the control module 62 detects that the object moves in the step 703 due to the movement of an animal or a pedestrian, or the control module 62 cannot read the license plate number from the temporary voucher photo due to the lack of clarity of the license plate number, then step 708 is performed.
In step 705, the control module 62 screens and captures the license plate part in the temporary certificate photo as the license plate certificate photo according to the outline and the arrangement distance of the universal license plate, and transmits the license plate certificate photo and the time parameter to the sending unit 5, and then goes to step 706.
In step 706, the control module 62 deletes the temporary voucher photo to ensure that the temporary voucher photo does not remain, and continues with step 707.
In step 707, the sending unit 5 receives the license plate certificate photo and the time parameter, and sends the license plate certificate photo and the time parameter to the external device 91, so that the external device 91 receives and calculates the time of entering the license plate in the license plate certificate photo.
In step 708, since the control module 62 cannot read the license plate number from the temporary voucher photo, the control module 62 deletes the temporary voucher photo and transmits a license plate abnormality signal and the time parameter to the sending unit 5, and the sending unit 5 also transmits the license plate abnormality signal and the time parameter to the external device 91, and returns to step 702. The external device 91 obtains the relevant information of the failed license plate number identification according to the abnormal license plate signal and the time parameter and performs subsequent processing.
In summary, the embedded license plate recognition screening system 2 and the control method thereof of the present invention integrate the housing unit 3, the camera unit 4, the processing unit 6 and the sending unit 5, and transmit the real-time image captured by the camera unit 4 to the register 61 in a streaming manner, so that the processing unit 6 can determine whether there is an object moving in the image of the detected real-time image through the control module 62, capture the image of the real-time image as the temporary certificate photo, and screen and capture the photo of the license plate part as the license plate certificate photo according to the license plate outline.
Finally, the control module 62 only transmits the license plate certificate photo to the external device 91 through the sending unit 5, so as to prevent the outflow of the photos related to the privacy of others captured by the camera unit 4 embedded in the ground, and the embedded license plate recognition screening system 2 and the control method thereof of the invention can reduce the volume and protect the private photos of others from the outflow by integrating the housing unit 3, the camera unit 4, the processing unit 6 and the sending unit 5, thereby achieving the purpose of the invention.
Claims (15)
1. The utility model provides an bury formula license plate and discern screening system, is suitable for external equipment, bury formula license plate and discern screening system and contain the housing unit and set up in the camera unit in the housing unit, its characterized in that: the embedded license plate identification and screening system further comprises a sending unit and a processing unit electrically connected with the camera unit, the shell unit is used for being arranged on and embedded in the ground, the camera unit is used for shooting a real-time image towards the oblique upper side, the processing unit comprises a control module and receives the real-time image shot by the camera unit in a streaming mode, the control module is used for capturing a picture of the real-time image as a temporary certificate photo, screening and capturing a license plate part according to the license plate outline in the temporary certificate photo, storing the photo of the license plate part as the license plate certificate photo in addition and transmitting the license plate certificate photo to the sending unit, and the sending unit receives the license plate certificate photo and sends the license plate certificate photo to the external equipment.
2. The embedded license plate recognition screening system of claim 1, wherein: the embedded license plate identification and screening system further comprises a sensing unit electrically connected with the camera unit, and when the sensing unit detects that an object moves in the range, the control module captures the picture of the real-time image as the temporary certificate photo.
3. The embedded license plate recognition screening system of claim 1, wherein: the processing unit further comprises a register electrically connected with the camera unit and used for receiving the real-time images transmitted by the camera unit in a streaming mode.
4. The embedded license plate recognition screening system of claim 1, wherein: the control module detects whether an object moves in the picture of the real-time image according to the picture of the real-time image, and if the object moves in the picture of the real-time image, the control module captures the picture of the real-time image as the temporary certificate photo.
5. The embedded license plate recognition screening system of claim 4, wherein: the control module detects whether an object moves in a specific area in the real-time image according to the picture of the real-time image, and if the object moves in the specific area, the control module captures the picture of the real-time image and stores the picture as the temporary certificate photo.
6. The embedded license plate recognition screening system of claim 1, wherein: the control module identifies the license plate number according to the temporary voucher photo, screens and extracts a license plate part according to the license plate outline in the temporary voucher photo, and if the control module cannot read the license plate number from the temporary voucher photo, the control module transmits a license plate abnormal signal to the sending unit.
7. The embedded license plate recognition screening system of claim 1, wherein: and the control module screens and extracts a license plate part according to the license plate outline in the temporary certificate photo, and deletes the temporary certificate photo after the license plate part is additionally stored as the license plate certificate photo.
8. The embedded license plate recognition screening system of claim 1, wherein: the control module judges the current time of the license plate number in the temporary certificate photo identified by the control module according to the real-time image, the current time is stored as a time parameter, the license plate certificate photo and the time parameter are transmitted to the sending unit, and the sending unit sends the license plate certificate photo and the time parameter to the external equipment.
9. A control method of an embedded license plate identification and screening system is suitable for external equipment, the embedded license plate identification and screening system comprises a camera unit, a processing unit electrically connected with the camera unit, and a sending unit electrically connected with the processing unit, and is characterized in that: the control method comprises the following steps:
(A) starting the camera unit, shooting a real-time image and transmitting the real-time image to the processing unit in a streaming mode;
(B) a control module in the processing unit captures a picture of the real-time image as a temporary certificate photo;
(C) the control module screens and extracts a license plate part according to the license plate outline in the temporary certificate photo, stores the photo of the license plate part as the license plate certificate photo and transmits the license plate certificate photo to the sending unit; and
(D) and the sending unit receives the license plate voucher photo and sends the license plate voucher photo to the external equipment.
10. The method of claim 9, wherein the embedded license plate recognition and screening system further comprises: the processing unit further comprises a register electrically connected with the camera unit and the control module, and in the step (A), the camera unit is started to shoot the real-time image and transmit the real-time image to the register in a streaming mode.
11. The method of claim 9, wherein the embedded license plate recognition and screening system further comprises: the control method also comprises a step (E) between the step (B) and the step (C), wherein in the step (E), the control module identifies the license plate number according to the temporary voucher photo, if the control module reads the license plate number from the temporary voucher photo, the step (C) is continued, and if the control module cannot read the license plate number from the temporary voucher photo, the temporary voucher photo is deleted, and a license plate abnormal signal is transmitted to the sending unit.
12. The method of claim 9, wherein the embedded license plate recognition and screening system further comprises: the control method further comprises a step (F) between the step (A) and the step (B), wherein in the step (F), the control module detects the picture of the real-time image and judges whether an object moves in the picture of the real-time image, and if the object moves in the picture of the real-time image, the step (B) is continued.
13. The method of claim 12, wherein the method further comprises: in the step (F), the control module detects a specific area in the real-time image, and determines whether an object moves in the specific area, if the object moves in the specific area, the step (B) is continued, and in the step (B), the control module captures a picture of the real-time image as the temporary voucher photo.
14. The method of claim 9, wherein the embedded license plate recognition and screening system further comprises: the control method also comprises a step (G) between the step (C) and the step (D), in which the control module deletes the temporary voucher photo.
15. The method of claim 9, wherein the embedded license plate recognition and screening system further comprises: the control method further comprises a step (H) between the step (B) and the step (C), in the step (H), the control module judges that the control module identifies the current time containing the license plate number in the temporary certificate photo according to the real-time image and stores the current time as a time parameter, in the step (C), the control module screens and extracts a license plate part according to the license plate outline in the temporary certificate photo, stores the license plate part as the license plate certificate photo and transmits the license plate certificate photo and the time parameter to the sending unit, and in the step (D), the sending unit receives the license plate certificate photo and the time parameter and sends the license plate certificate photo and the time parameter to the external equipment.
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| CN202010315016.7A CN111524360A (en) | 2020-04-21 | 2020-04-21 | Embedded license plate identification and screening system and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114241787A (en) * | 2021-10-01 | 2022-03-25 | 刘哲安 | Embedded parking identification system and control method thereof |
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Application publication date: 20200811 |