Parking license plate recognition and debugging

A license plate recognition overview

License plate number recognition, referred to as license plate recognition, also known as license plate number recognition or vehicle license plate recognition or vehicle number plate recognition, is an application of computer video image recognition technology in vehicle license plate recognition, that is, the license plate number is extracted and identified from image information. come out. Vehicle number identification is a very important technology in the intelligent transportation system and can be widely applied to various types of vehicles with exclusive numbers, such as automobiles, trains, and non-vehicle vehicles.

Vehicle number identification has achieved a wide range of applications, such as electronic *, * bayonet, highway speed and toll collection, parking management, Skynet monitoring, car special parking management, especially in electronic * and * bayonet and highway In other areas, the license plate recognition function has basically been established. The parking lot has also entered the stage of extensive application in China since 2012. By the end of 2013, it is estimated that it has reached a coverage rate of 10%. The application of Skynet monitoring and special train parking has only just begun.

The general principle of license plate number recognition is as follows: It is divided into four modules: image acquisition, license plate positioning, character segmentation, and character recognition. Then software programming is used to implement each part, and finally the license plate is identified and the license plate number is output.

The license plate recognition integrated camera is an intelligent, high-definition vehicle license plate recognition integrated product specially developed for the parking lot industry. It is an exclusive combination of license plate recognition, camera, front-end storage, fill light, etc. It adopts high-definition wide dynamic CMOS and TI DSP. Computing power up to 6.4Ghz. Based on the license plate automatic exposure control algorithm, excellent imaging. With excellent performance, versatility, high adaptability, strong stability and other characteristics, it is a good application form of the license plate recognition function of the parking lot management system.

The power consumption and parameters of F license plate recognition integrated machine are introduced:

Power supply: 220~230V---2A (optional adapter)

Power consumption: less than 10W

Dimensions: 452x145x133mm

Working temperature: -25°C ~ 70°C

Working humidity: ≤ 90%

Number plate recognition rate ≥99.8% during the day and ≥99.6% at night

Number plate detection rate during the day ≥99.9%; nighttime ≥99.7%

Adapt to speed 0-150 km/h

Support license type: Ordinary blue card, black card, yellow card, double yellow card, police car license plate, new type* license plate, new military brand, Hong Kong and Macao access to the mainland license plate

Camera video mode 2 million pixels

Camera pixel 2 million pixels

White list capacity: 10000

Snapshot picture record number = memory card capacity 500KB

Second, license plate recognition before installation considerations

1. Computer configuration requirements

Large network connection server configuration

CPU slots: 2 or more

Processor: E5-2407 v2 processor above 2.4GHZ

Memory: 4G or more

Hard disk: more than 1T

Operating System: Servers Windows 2003 32-bit, Windows 2008 32-bit

Client configuration

Processor: Intel i3 processor dual core 2.6GHZ or more

Memory: 4G or more

Graphics Card: Memory Above 1G

COM serial port: 1 or more

Display: Resolution 1440*900, 1280*1024 or more

Hard disk: more than 80G

Motherboard chip for Intel chipset

Operating system: client windows xp, windows7 32-bit Ultimate Edition operating system

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