KR101809490B1 - The vehicle entrance and exit management and crime prevention system based on high definition images - Google Patents

The vehicle entrance and exit management and crime prevention system based on high definition images Download PDF

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Publication number
KR101809490B1
KR101809490B1 KR1020150188275A KR20150188275A KR101809490B1 KR 101809490 B1 KR101809490 B1 KR 101809490B1 KR 1020150188275 A KR1020150188275 A KR 1020150188275A KR 20150188275 A KR20150188275 A KR 20150188275A KR 101809490 B1 KR101809490 B1 KR 101809490B1
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South Korea
Prior art keywords
vehicle
unit
license plate
data
exit
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KR1020150188275A
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Korean (ko)
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KR20170078910A (en
Inventor
박구만
장지웅
조성만
전소연
김수진
전지혜
정양섭
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서울과학기술대학교 산학협력단
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Priority to KR1020150188275A priority Critical patent/KR101809490B1/en
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/065—Traffic control systems for road vehicles by counting the vehicles in a section of the road or in a parking area, i.e. comparing incoming count with outgoing count
    • G06K9/3258—
    • 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
    • G06K2209/15—

Abstract

In the present invention, the conventional license plate detecting apparatus uses a low-resolution image in most cases. However, it is disadvantageous in that the amount of information input to the image is limited, the license plate detecting apparatus must be installed only in a limited place, It is necessary to install additional equipment in order to add criminal vehicle recognition and tracking function. Therefore, it takes a long time to install and the device compatibility is poor, The smart PTZ camera module 100, the vehicle entry / exit tracking control module 200, and the vehicle entry / exit gate module 300, so that the viewpoint position, which is the range of the photographing sector to be photographed, It can be adjusted through PTZ camera which can move and move left and right, The apparatus can be miniaturized and can receive a high-resolution image, so that it can be installed in various places without being restricted by the place, and can be installed at various places surrounding a place where a vehicle entry / , Or the moving vehicle is recognized, the license plate can be detected in real time, and it can be databaseed. It is possible to improve the crime prevention by 80% compared to the conventional one by tracking the crime vehicle, , A high-resolution image-based vehicle entry / exit tracking system that can build its own security system through the tracking of criminal vehicles and effectively improve the performance of the vehicle entry / exit tracking device through database sharing with other places using the system The purpose of the device is to provide.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a vehicle navigation system,

According to the present invention, it is possible to construct an own security system by integrating vehicle license plate recognition devices installed in various places, and to manage the system around the system installation area and track down the miniaturization, installability, high resolution and crime vehicles, And more particularly, to a high-resolution image-based vehicle entry / exit tracking device capable of effectively improving the performance of a vehicle entry / exit tracking device through database sharing with other places.

Conventional license plate detection devices use low-resolution images in most cases, and thus have a disadvantage in that the amount of information input to the images is limited.

However, in modern times, it has become necessary to manage vehicle information in a wider area surrounding the installation site of the license plate detection device in order to prevent crime such as terrorism, as well as to control the entry and exit of the vehicle.

However, in the case of a low-resolution image, since the amount of information to be input is limited, there is a disadvantage in that it is necessary to install it only in a limited place in order to accurately detect the license plate and maintain the performance of managing the vehicle.

As a result, the information of the moving vehicle installed mainly in the entry and exit passage of the vehicle is inputted, and thus there is a limit to acquiring the information of the vehicles near the specific place.

In addition, even if the existing license plate detection apparatus has a high-resolution image input function, it is necessary to install separate additional equipment in order to recognize only a clear high-quality license plate and to add a criminal vehicle recognition and tracking function. And device incompatibility is poor, so that a device error frequently occurs, which has a problem in that the tracking market for the entry and exit of the vehicle is becoming increasingly shrinking.

Korean Patent Laid-Open Publication No. 10-2013-0097868

In order to achieve the above object, according to the present invention, a viewpoint position, which is a range of a photographing sector to be photographed, can be adjusted through a PTZ camera capable of moving up and down and left and right according to the purpose and use of the camera. And it is an object of the present invention to provide a high-resolution image-based vehicle entry / exit tracking device that can be converted into a database and can build its own security system.

In order to achieve the above object, a high-resolution image-based vehicle entry /

A smart PTZ camera module 100 for photographing a vehicle number and a driver within a photographing sector range to be photographed,

The current vehicle number data and the vehicle character data are detected from the license plate image inputted from the smart PTZ camera module and compared with the reference vehicle number data and the reference vehicle character data inputted in advance and then the OPEN signal and the OPEN signal are inputted to the vehicle entry / An input / output tracking control module 200 for controlling the output of a CLOSE signal or outputting a tracking command signal to another neighboring smart PTZ camera module,

And a vehicle entry / exit gate module 300 installed on one side of the vehicle access road and one side of the bottom surface to allow the blocking bar to be allowed to go in or out according to a control signal of the vehicle entry / exit management tracking control module, or to block access to and exit from the blocking bar.

As described above, in the present invention,

First, it can be adjusted through PTZ camera which can move up and down and left and right according to the purpose and purpose of use.

Second, since the device can be miniaturized and high-resolution images can be input, it can be installed in various places without being restricted by the place.

Third, it is possible to detect not only a vehicle entrance but also a stationary vehicle or a moving vehicle at various places surrounding a place where a vehicle entry / exit tracking device is installed, detect a license plate in real time, Crime prevention can be improved by 80%.

Fourth, it can build its own crime prevention system through miniaturization, installation, high resolution, criminal vehicle tracking, and can effectively improve the performance of the vehicle entry / exit tracking device through database sharing with other places using the system .

1 is a block diagram showing components of a high-resolution image-based vehicle entry / exit tracking device 1 according to the present invention.
FIG. 2 is a perspective view showing the components of the high-resolution image-based vehicle entry / exit tracking device 1 according to the present invention,
FIG. 3 is a block diagram illustrating components of a smart PTZ camera module according to the present invention.
FIG. 4 is a view showing that the PTZ camera photographing unit according to the present invention is positively positioned by driving P (Pam), T (Tilt), and Z (Zoom) within a photographing sector range to photograph a license plate of a vehicle located within a photographing sector range In one embodiment,
FIG. 5 is a diagram illustrating an example of detecting a border area according to an actual license plate by using the image and information received from the license plate verification unit through the license plate detection unit according to the present invention,
6 is a block diagram illustrating components of a license plate verification part according to the present invention,
FIG. 7 is a block diagram showing the components of the vehicle entry / exit tracking control module according to the present invention;
8 is a block diagram showing the components of the car number recognizing unit according to the present invention,
9 is a flowchart illustrating a process of segmenting a character within a license plate image through a character type classification unit according to an exemplary embodiment of the present invention,
FIG. 10 is a flowchart illustrating a method of performing a number recognition operation by using a predetermined database so as to detect the number of a license plate of a vehicle inputted in a real image in the case of a number through a character recognition unit according to the present invention.
FIG. 11 is a view for explaining a method of detecting the current vehicle number data and the vehicle character data from the license plate image inputted from the smart PTZ camera module through the vehicle entry / exit tracking control module according to the present invention and comparing the data with the reference vehicle character data After analyzing, if it is not the vehicle of interest, an embodiment showing that the blocking bar is opened by outputting an OPEN signal to the vehicle entering /
FIG. 12 is a view for explaining the current vehicle number data and the vehicle character data from the license plate image inputted from the smart PTZ camera module through the vehicle entry / exit tracking control module according to the present invention and comparing the current vehicle number data with the reference vehicle character data After analyzing, if the vehicle is a vehicle of interest, the CLOSE signal is outputted to the vehicle entry / exit gate module to close and close the blocking bar.
FIG. 13 is a flowchart illustrating a method of tracking a target vehicle in real time by outputting a tracking command signal to another neighboring smart PTZ camera module in the vehicle entry / exit tracking control module when the vehicle enters and departs from a vehicle of interest through the vehicle entry / exit tracking control module according to the present invention One embodiment shown is also shown.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing components of a high-resolution image-based vehicle entry / exit tracking device 1 according to the present invention. FIG. 2 is a block diagram illustrating a high-resolution image- And includes a smart PTZ camera module 100, a vehicle entry / exit tracking control module 200, and a vehicle entry / exit gate module 300.

First, the smart PTZ camera module 100 according to the present invention will be described.

The smart PTZ camera module 100 photographs a vehicle number and a driver within a photographing sector range to be photographed.

3, the vehicle entry sensing unit 110, the PTZ camera photographing unit 120, the preprocessing unit 130, the license plate candidate region detection unit 140, the license plate verification unit 150, the license plate region detection unit 160, and a data transfer unit 170.

First, the vehicle entry sensing unit 110 according to the present invention will be described.

The vehicle entry sensing unit 110 shoots infrared rays within a photographing sector range to be photographed and senses a blocked signal to sense that the vehicle has entered.

Second, the PTZ camera photographing unit 120 according to the present invention will be described.

As shown in FIG. 4, the PTZ camera photographing unit 120 is driven by P (Pam), T (Tilt), and Z (Zoom) within a photographing sector range, As shown in FIG.

Third, the preprocessing unit 130 according to the present invention will be described.

The preprocessing unit 130 preprocesses the license plate of the vehicle photographed by the PTZ camera photographing unit.

This converts the license plate image of the photographed vehicle into a grayscale image having 256 brightness values of 8 bits.

After that, histogram smoothing is performed by preprocessing.

Fourth, the license plate candidate region detecting unit 140 according to the present invention will be described.

The license plate candidate region detecting unit 140 detects frame information of all pieces of information in the image using the license plate image transmitted from the preprocessing unit.

It filters about half the background of the license plate images taken through the AdaBoost algorithm engine and finally detects license plate candidate area information of the license plate.

Fifth, the license plate verification unit 150 according to the present invention will be described.

The license plate authentication unit 150 discriminates whether license plates of all the frame data information in the image are correct by using the image and information received from the license plate candidate region detecting unit 140. [

As shown in Fig. 6, the Otsu binarization unit 151 and the Cliff algorithm engine unit 152 are constituted.

The license plate authenticator 150 extracts the coordinate values of the four corners of the license plate candidate region, and then normalizes it to a size of 250 * 100 using Perspective Warping technique.

After normalization, the license plate area is binarized through the Otsu binarization unit.

The Otsu binarization unit 151 serves to binarize a license plate having a shadow due to an irregular external illumination state.

The clef algorithm engine 152 removes miscellanies in the license plate area and simultaneously labels the connection elements to extract vehicle number data and vehicle character data.

In this way, when the angle is equal to or larger than a predetermined size through the license plate authentication unit 150 comprising the Otsu binarization unit 151 and the Cliff algorithm engine unit 152, or when the inputted angle deviates from a predetermined value, It is judged that the area is not the area and all of them are deleted.

Sixth, the license plate area detecting unit 160 according to the present invention will be described.

As shown in FIG. 5, the license plate area detecting unit 160 serves to detect a frame area according to an actual license plate specification by using the image and information received from the license plate authentication unit 150 do.

It consists of a Canny edge algorithm engine part to which a rank filter is applied.

The Canny edge algorithm engine unit applies a rank filter for enhancing the vertical component without performing Gaussian smoothing in the first stage.

Here, the rank filter is a nonlinear filter, and has a characteristic of reinforcing a vertical component or a horizontal component, thereby reducing noise and enhancing a specific edge component.

That is, a rank filter mask having a width larger than the height is used to strengthen the lateral edge, and a rank filter mask having a larger height than the width is used to enhance the longitudinal edge.

Seventh, a data transfer unit 170 according to the present invention will be described.

The data transfer unit 170 transfers the number plate and the border area of the vehicle detected by the license plate area detecting unit to the vehicle entry / exit tracking control module.

It consists of wired data communication network and wireless data communication network.

Next, the vehicle entry / exit tracking control module 200 according to the present invention will be described.

The vehicle entry / exit tracking control module 200 detects the current vehicle number data and the vehicle character data from the license plate image inputted from the smart PTZ camera module, compares and analyzes the current vehicle number data and the reference vehicle character data, And outputs an open signal and a close signal to the vehicle entrance / exit gate module or controls the output of a trace command signal to another neighboring smart PTZ camera module.

As shown in FIG. 7, the vehicle number comparison and analysis engine unit 220, the gate module driver unit 230, the networking tracking unit 240, and the smart device interface unit 250 .

First, the vehicle number recognizing unit 210 according to the present invention will be described.

The vehicle number recognizing unit 210 divides the number plate region detected and photographed by the smart PTZ camera unit into the current vehicle number data and the current vehicle character data, and classifies and recognizes the same.

As shown in FIG. 8, this includes a character type classification unit 211, a character recognition unit 212, and a character arrangement unit 213.

The character type classification unit 211 receives all the data stored in the license plate image processed by the preprocessing unit 310 and classifies the data into noise, numbers, and characters.

If the area detected by the preset database has a value outside the predetermined height, width, or size, it is determined that the area is noisy and all of the areas are removed.

Then, the information of the dictionary database is applied to the positions of the detected regions, and the operation of determining the regions as numbers or letters is performed.

Then, as shown in FIG. 9, the license plate video image is processed in a clear manner by segmenting characters inside the license plate image.

The character recognition unit 212 performs a recognition operation for each of the characters classified through the character type classification unit.

As shown in FIG. 10, in the case of a number, the number recognition operation is performed by a database set in advance so as to detect the number of the license plate of the vehicle inputted in the actual image.

Then, in the case of characters, the character recognition operation is carried out by the database set in advance so that the characters of the license plate of the vehicle inputted in the actual image can be detected.

The character arrangement unit 213 precisely arranges the numbers and character area information acquired through the character recognition unit so as to match the contents of the actual license plate, and then transmits the arrangement result data to the vehicle number comparison and analysis engine unit.

Second, the car number comparison and analysis engine unit 220 according to the present invention will be described.

The car number comparison and analysis engine unit 220 compares the current car number data and current car character data recognized through the car number recognition unit with the car number data of interest and the car character data of interest in advance.

This includes a database for storing interest car number data and interest car character data in real time from a vehicle control server at a remote place through a Wifi wireless communication module.

Third, the gate module driver 230 according to the present invention will be described.

The gate module driver 230 outputs an OPEN signal or a CLOSE signal to the vehicle entry / exit gate module in accordance with the comparison result of the car number comparison analysis.

It is composed of a local wired / wireless communication network and is configured to be connected to a blocking bar of a gate entry / exit module to output an OPEN signal or a CLOSE signal toward the blocking bar.

Fourth, the networking tracking unit 240 according to the present invention will be described.

The networking tracking unit 240 constructs a database by adding and updating the result of the comparative analysis through comparison with the car number comparison analysis, and outputs a tracking command signal to another neighboring smart PTZ camera module .

This is accomplished by storing the number plate and character information of the vehicle obtained from the car number recognition unit in the database, as well as the result of comparing and analyzing the car number comparison analysis through the genuine part.

Then, the information of the inputted vehicle is updated according to each case according to whether the vehicle entering the system is the first entry vehicle or the vehicle in which data is stored.

Thereby allowing the subsequent processing to proceed smoothly.

Fifth, the smart device interface unit 250 according to the present invention will be described.

If the result of the comparative analysis of the vehicle number comparison analysis is a vehicle of interest, the smart device interconnection unit 250 transmits the current interest vehicle number data photographed within the photographing sector range to the smart device of the manager, And carries the character data of the vehicle in real time.

This stores the unique identification ID of the smart device, and when there is a car of interest in the photographing sector range, it connects with the smart device and displays the current interest car number data photographed within the photographing sector range with a text message or voice message, And is configured to transmit character data in real time.

Next, the vehicle entry / exit gate module 300 according to the present invention will be described.

The vehicle entry / exit gate module 300 is installed at one side of both sides of the vehicle access road and one side of the bottom surface to allow the blocking bar to go in or out according to a control signal of the vehicle entry / exit tracking control module, or to block access to the blocking bar.

This is configured such that one side of the output terminal of the blocking bar is connected to the gate module driver unit, the blocking bar is raised according to the OPEN signal of the gate module driver unit, and the blocking bar is lowered according to the CLOSE signal of the gate module driver unit.

Hereinafter, a specific operation process of the high-resolution image-based vehicle entry / exit tracking device according to the present invention will be described.

First, the vehicle entry sensing unit of the smart PTZ camera module 100 shoots infrared rays within a photographing sector range to be photographed to sense a blocked signal and senses that the vehicle has entered.

Next, the PTZ camera photographing section is driven to photograph the number plate of the vehicle and the driver located within the photographing sector range while driving P (Pam), T (Tilt), and Z (Zoom) within the photographing sector range.

Next, the license plate and the border area detected by the license plate area detecting unit are transmitted to the vehicle entry / exit tracking control module through the data transfer unit.

11 and 12, the vehicle entry / exit tracking control module detects the current vehicle number data and the vehicle character data from the license plate image inputted from the smart PTZ camera module, And outputs the OPEN signal and the CLOSE signal to the vehicle entry / exit gate module.

Next, as shown in Figs. 11 and 12, the vehicle entry / exit gate module is driven in accordance with the control signal of the vehicle entry / exit tracking control module to lift the blocking bar to allow access, or to block access to the blocking bar.

Next, as shown in FIG. 13, when the vehicle is in the interested vehicle, the vehicle entry / exit tracking control module outputs a tracking command signal to another neighboring smart PTZ camera module to track the interested vehicle in real time.

Finally, if the vehicle is a car of interest, the car entry / exit management tracking module transmits the current interest car number data photographed within the photographing sector range to the manager's smart device in real time and the current car character data of interest.

1: Vehicle entry / exit tracking device 100: Smart PTZ camera module
200: Vehicle entrance / exit management tracking control module 300: Vehicle entry / exit gate module

Claims (5)

A smart PTZ camera module 100 for photographing a vehicle number and a driver within a photographing sector range to be photographed,
The current vehicle number data and the vehicle character data are detected from the license plate image inputted from the smart PTZ camera module and compared with the reference vehicle number data and the reference vehicle character data inputted in advance and then the OPEN signal and the OPEN signal are inputted to the vehicle entry / An input / output tracking control module 200 for controlling the output of a CLOSE signal or outputting a tracking command signal to another neighboring smart PTZ camera module,
And a vehicle entry / exit gate module (300) installed on one side of the vehicle access road and one side of the bottom surface to allow the blocking bar to go in or out according to a control signal of the vehicle entry / exit tracking control module,
The vehicle entry / exit tracking control module 200
A vehicle number recognizing unit 210 for recognizing and classifying the area of the license plate detected in the smart PTZ camera module by dividing the area of the license plate into the current vehicle number data and the current vehicle character data,
A car number comparison and analysis engine unit 220 for comparing and analyzing current car number data and current car character data recognized through the car number recognizing unit with the car number data of interest and the car character data of interest inputted in advance,
A gate module driver 230 for outputting an OPEN signal or a CLOSE signal to the vehicle entry / exit gate module according to the comparison result of the vehicle number comparison analysis through the truth section,
A networking tracking unit 240 for adding and updating the result of comparing and analyzing the vehicle number comparison analysis through the truth table to construct a database and outputting a tracking command signal to another neighboring smart PTZ camera module,
If the result of the comparative analysis of the car number comparison is analyzed through the cliché, then the smart car that transmits the current car number data of interest and the current car data of interest taken in the photographing sector range to the smart device of the manager in real time And a device connection unit (250), the apparatus comprising:
The vehicle number recognizing unit 210
A character type classifying unit 211 for receiving all the data stored in the license plate image processed by the preprocessing unit 310 and classifying the data into noise,
A character recognition unit 212 for recognizing the characters classified through the character type classification unit,
And a character arrangement unit 213 for correctly arranging the information of the numbers and character areas acquired through the character recognition unit so as to match the contents of the actual license plate and then transmitting the arrangement result data to the vehicle number comparison and analysis engine unit High-resolution image-based vehicle entry / exit tracking device.
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KR102505353B1 (en) 2022-03-11 2023-02-28 김익균 Smart illegal monitoring prevention system using smartphone interlocking function

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KR102505353B1 (en) 2022-03-11 2023-02-28 김익균 Smart illegal monitoring prevention system using smartphone interlocking function

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