Introduction
Vehicle license plate recognition in CCTV is one of the latest technologies available in the field of CCTV. These cameras have high image quality and are able to recognize license plates at any time of the day or night or in any weather condition.
The license plate reader and vehicle detection CCTV camera is a security tool that detects and records vehicle license plates using digital cameras. The license plate recognition technology is very important due to the increase in traffic and the security risks associated with the identification of cars that flee instead of following and locating them.
The license plate recognition camera is a technology that extracts and analyzes information about license plates, letters and numbers using images taken from license plates. These cameras are usually used in public places, such as streets, parking lots or entrance gates to buildings, to provide information for traffic monitoring, security and vehicle management.
This camera allows you to receive license plates of cars in places where traffic control is necessary and compare them with the registered database. In this way, any type of error, attempt to steal a car or any type of illegal activity can be detected and the police can also be notified.
⚡ Due to the technology-based approach and without the need for workers, the license plate reader and vehicle recognition will reduce costs and increase accuracy and speed in the management of vehicle traffic.
License plate recognition cameras are installed in places such as roads, important government and political organizations, parking lots. The advantage of having a camera is that many robberies and crimes are prevented, or if a crime or accident happens, it is easier to track it.
These cameras record the license plates of all passing cars, even the cars that are not suspicious because the information of all cars is needed during the investigation. When buying a license plate recognition camera, you may come across the terms LPR and ANPR.
License plate recognition camera and LPR and ANPR technology
CCTV cameras can save license plates by recording images, but if the camera has license plate recognition technology (LPR and ANPR), it can record and identify the desired license plate numbers and letters separately. LPR stands for License Plate Recognition.
As the name of this CCTV camera shows, it can record the desired license plate in any situation. These conditions can be high speed of the car, low light, fog and bad weather conditions.
What does LPR technology stand for?
As we said, LPR stands for License Plate Recognition. These closed circuit cameras or LPR software reads and recognizes car license plates. Matches and connects them to a specific database or software function. This technology includes the advantages that we mention in this section:
- LPR software allows you to blacklist, white or filter license plate numbers.
- There are several software for this technology, but the data can be collected in a database and they provide us with the possibility of local and international reporting.
- Even this technology can inform the police of the license plate number that matches the license plate number of a criminal to avoid dangers.
You may say to yourself, how does this technology work?
When the car approaches the safe zone, its entry into the camera’s field of vision starts its identification operation and the presence of that car is sent to the LPR unit.
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Then, the system takes a picture of the rear or front license plate of the car using LPR cameras, which photos contain the license plate and pixel information that can only be read by the image processing hardware of the LPR system.
With the help of different image processing algorithms, the software examines and analyzes the images and recognizes the location of the license plate, then extracts the numbers and letters of the license plate and even determines the font of the license plate using artificial intelligence methods. Then, they examine the car; Is this car defined in the list of cars or not?
If they find your car in the list, they will allow you to pass through the gate and enter the safe area. After that car leaves, the gate identification system closes, and now the system is waiting for another car to enter the safe zone. The advantages of LPR technology is that it can put the license plate number in the black or white list or filter. This software can report the license plate number that matches the criminal’s license plate number.
What is ANPR technology?
ANPR technology stands for automatic number plate recognition and means automatic recognition of the car’s license plate number. This software captures and records the image of the license plate, and then the LPR software identifies the numbers and letters of the license plate.
There are several cases of CCTV software with ANPR from the possibility of connecting the camera to various devices and control cameras, entrance gates, as well as opening the barricade at the specified time and even determining the time for the traffic of vehicles that have no problems.
As soon as the license plate is placed in front of the software camera, it records the license plate and specifies the name and image of the car owner. It also saves the time and date of crossing that area.
The difference between LPR and ANPR in a license plate reader CCTV camera
As mentioned, the terms LPR and ANPR are both related to license plate recognition cameras. These two abbreviations are License Plate Reader and Automatic Number Plate Recognition.
The term LPR or License Plate Reader refers to CCTV cameras that are able to read and recognize vehicle license plates. Using license plate recognition algorithms, these cameras are able to read the license plate number from the image taken from the cars. These license plate numbers are stored and processed for vehicle traffic control, environmental security or any other purpose.
In other words, LPR is a technology that is used in CCTV cameras and only recognizes the license plate and receives information about it.
Also, ANPR or automatic license plate reading is a more comprehensive system that, in addition to license plate recognition, is also capable of processing and interpreting license plate information. ANPR extracts license plate information and uses it for more accurate detection and identification.
This system is able to detect and record information and details of the car by using complex imaging and image processing algorithms. Therefore, the main difference between LPR and ANPR in a license plate reader CCTV camera is regarding the license plate recognition capabilities.
LPR is only able to read and recognize license plate numbers. Usually, LPR is used in cases where there is only a need to recognize the license plate number for a specific purpose such as traffic control.
In short, LPR cameras only capture license plate images and recognize license plate numbers, while ANPR is able to more comprehensively extract and analyze license plate information. ANPR is able to detect information such as location, time, number plate type and other details of the license plate.
In general, it can be said that LPR is considered as a subset of ANPR technology. ANPR uses more advanced algorithms and techniques to recognize and analyze license plates, while LPR is limited to license plate number recognition. Choosing between LPR and ANPR depends on your needs and use cases.
How does the license plate recognition camera work?
The license plate recognition camera identifies the license plate using OCR (visual character recognition) technology in the imaging scene. Using complex algorithms, this technology separates the existing characters and helps identify the signs and the empty space between the characters.
Then, to confirm the result, the estimation of the angle of the photo and the mapping is accumulated from the image and determines whether the number plate read is acceptable or not. Finally, depending on the type of device, the read license plate information is sent to a traffic control system or image processing software.
When the car passes in front of the camera, the license plate is registered and sent to the LPR. This technology works even in bad weather conditions, high and low light, high speed of the car in different lanes. The photo that LPR takes from the front or rear license plate of the car is processed by its hardware system and checked in the device information.
Here, ANPR comes to the aid of LPR and can identify the numbers and letters of license plates and even recognize its font, then determine the location of the license plate and car information. If the car has no problems, it is allowed to pass.
License plate reader camera applications
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traffic control:
License plate reader camera technology is used to identify authorized and unauthorized vehicles in traffic control, entry and exit of cities, and sensitive areas.
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Identification of stolen or prohibited vehicles:
License plate camera technology is used to identify stolen or impounded vehicles, for example, to identify blacklisted vehicles.
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Parking management:
License plate reader technology is used to manage parking lots, for example, to identify vehicles that are allowed to enter the parking lot.
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Registration of road tolls:
This technology is used to register road tolls, for example, to identify vehicles that have passed through tolls.
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Vehicle tracking:
For example, to identify cars that travel in a certain area.
LPR and ANPR Technology camera feature
License plate cameras have many features that we will discuss below. The most important feature is the easy installation of the camera in any place. Of course, please note that the use of these cameras is mostly on traffic lights and entrances of customs gates or lamp posts installed on streets or bridges.
It is enough to install a cable for the electric current and data of the device. Of course, the camera is also easy to set up. Control the software on your phone or tablet using a graphical interface like GUI. These cameras start working and recording information automatically after turning on.
The quality of the camera is very important to correctly recognize the license plate. When buying, be careful to choose a camera that has acceptable quality. Of course, after turning on the license plate recognition camera, it adjusts the light and quality of the device by checking the environment. These cameras can also see at night.
⚡These cameras also have high security, for example, when the settings of the device are changed or it cannot recognize license plates correctly, the alarm system activates.
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image quality:
License plate reader cameras must have high image quality to capture license plate number details well.
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WDR capability:
The WDR (high dynamic range) feature is very important and helps produce quality images in different light conditions.
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Night vision in LPR and ANPR technology:
License plate recognition cameras must have color night vision to be able to record license plate numbers well at night.
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HLC capability:
The HLC (High Light Control) feature facilitates recognition and registration of license plate numbers in low light conditions.
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ROI capability:
ROI (area of image feedback) technology focuses on capturing important areas in images without reducing quality and is used to reduce storage costs and bandwidth.
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Defog feature:
Considering the weather conditions and the installation environment, anti-fog of the license plate identification CCTV camera is important.
Other features: Features such as resistance to noise, resistance to vibrations, wind, vibration and impact are also of great importance. Therefore, it is important to choose the right camera based on your needs to recognize license plates.
What is the best LPR and ANPR Technology CCTV camera?
For example, license plate reader CCTV cameras from companies such as Hikvision, Dahua, Bosch and Axis are commonly used for this purpose. To choose the best model, you need to consider your specific constraints, including installation location, lighting conditions, configuration options, and budget. It is better to contact different suppliers and read user reviews to make the right choice.