OCR technology-Key to License Plate Recognition

Key core License Plate Recognition machine, License Plate Recognition camera, OCR License Plate Recognition

Background of License Plate Recognition cameras

With the construction of a smart city, the concept of smart parking lots has entered the field of view. The traditional parking lot management mainly distributes IC cards to vehicles entering the parking lot, which is easy to be copied and stolen, easy to lose, lack of intelligence, and cause congestion. Nowadays, the efficient, convenient and intelligent License Plate Recognition System has become the main direction of the development of the parking industry.

License Plate Recognition cameras recognize license plate numbers instead of traditional parking cards, which can solve the following problems that often occur in the traditional system: 1. Solve the Problem of multiple vehicles with one card; 2. solve the problem that the card is not carried; 3. Solve the Problem of card replacement and card replacement caused by card loss; 4. Solve the Problem of card replacement and card replacement caused by card damage; 5. solve the problems caused by the penetration of distant cards and the replacement of battery; 6. solve the problems caused by malicious removal of temporary cards; 7. solve the problems caused by limited card capacity of the card issuing machine; 8. Solve problems caused by operator operations in disorder.

The License Plate Recognition parking lots system uses HD License Plate Recognition cameras and Tsinghua OCR technology. The License Plate Recognition process is as follows:

The License Plate Recognition camera integrates license plate location, license plate character segmentation, license plate character recognition and other algorithms to automatically capture vehicle photos, recognize license plate numbers, and collect license plate numbers, colors, and license plate feature data, the entry time information is transmitted to the management computer, so that vehicles can enter the parking lot without access. License Plate Recognition camera features: 1. License Plate Recognition cameras can run offline: using the storage function set in the camera, you can manage fixed vehicles without the need for an industrial computer to be unattended; 2. License Plate Recognition cameras have the ultimate License Plate Recognition Algorithm: the comprehensive recognition rate exceeds 99%, the recognition speed is fast, and the algorithm upgrade cycle is short.

3. A wide range of license plate types are supported, including: Blue Card, single double yellow card, new military vehicle license plate, new armed police license plate, agricultural vehicle license plate, embassy license plate, police car license plate, and personalized license plate;

4. Internal Structure of the License Plate Recognition Machine

5. License Plate Recognition cameras adopt an embedded integrated design: Adhering to the embedded integrated concept, integrates functions such as HD imaging, image acquisition, License Plate Recognition, image compression, and data storage on the embedded high-performance DSP smart camera platform. 5. The License Plate Recognition camera uses a 1.3 million-pixel high-definition camera, which can automatically identify the license plate number, license plate color, and other information in real time, and directly output the recognition result.

6. License Plate Recognition cameras have powerful exceptional license plate processing capabilities: License Plates under special circumstances such as reflective license plates, deformed license plates, defaced license plates, and yin and yang license plates can be effectively identified.

7. Supports the offline working mode based on the white list, 10 thousand entries in the White List, records, and LED display control.

8. Supports the development of multiple operating systems: WindowsXP, windows7, windows8, windows10, Linux, and ARM embedded

9. Supports multiple development languages: C/C ++, C #, VB.net, Java, and Delphi

Mounting method of License Plate Recognition all-in-one

I. RJ45 network port transmission:

1. sdks (interfaces and APIs): supports dynamic libraries such as Windows (. dll) and Linux (. So)

2. TCP/IP and HTTP protocols: cross-platform

Ii. RS485 transmission:

RS485 Protocol: mainly for Single Chip Microcomputer board, PLC control board transmission results

OCR technology-Key to License Plate Recognition