E-police's "capture" to See How Deep the Routine of License Plate Recognition Is! - Tiger Wong Techn

According to media reports, some drivers have come up with all kinds of wonderful ways to block the car license plate in order to avoid the arrest of the electronic police. Seeing these pictures, Xiaobian is also drunk. I just want to say that the drivers who have played a little smart are also too young too simple. Now, the new traffic regulations severely punish the license plate, impose a fine of 200 yuan for such acts, and even revoke the driver's license in serious cases. Therefore, drivers must not defy the law.

Under unremitting thinking, will the electronic police have such a great deterrent? How does it recognize license plates in highway checkpoints and urban traffic? This is the core part of the license plate recognition system. The vehicle number plate is like a person's ID card. It is the only recognizable certificate. Its particularity and importance determine that the license plate recognition system has become an indispensable and important part of the urban intelligent traffic management system. License plate recognition is a pattern recognition technology that uses the dynamic video or static image of the vehicle to automatically recognize the license plate number and license plate color.

The core of the technology includes license plate location algorithm, license plate character segmentation algorithm and optical character recognition algorithm. License plate recognition schematic diagram license plate recognition system adopts a highly modular design, and takes each link of the license plate recognition process as an independent module. Its system framework is shown below. vehicle detection and tracking module the vehicle detection and tracking module mainly analyzes the video stream, judges the position of the vehicle, tracks the vehicle in the image, and records the close-up picture of the vehicle at the best time of the vehicle position. Due to the addition of the tracking module, the system can well overcome various external interference, To obtain more reasonable recognition results, unlicensed vehicles can be detected and the results can be output. license plate location module license plate location module is a very important link and the basis of subsequent links. Its accuracy has a great impact on the overall system performance.

The license plate system completely abandons the previous algorithm ideas and realizes a new license plate location algorithm based on learning and multi feature fusion, which is suitable for various complex background environments and different camera angles. the license plate correction and fine positioning module is limited by the shooting conditions, and the license plate in the image will inevitably have a certain inclination. A correction and fine positioning link is needed to further improve the quality of the license plate image and prepare for the segmentation and recognition module. Using the well-designed fast image processing filter, not only the calculation is fast, but also the overall information of the license plate is used to avoid the influence of local noise. Another advantage of using this algorithm is that through the analysis of multiple intermediate results, it can also accurately locate the license plate and further reduce the influence of non license plate area. license plate segmentation module the license plate segmentation module of the license plate system makes use of the gray, color, edge distribution and other characteristics of the license plate text, which can better suppress the influence of other noise around the license plate and tolerate the license plate with a certain inclination angle. This algorithm is conducive to the application of license plate image noise similar to mobile inspection. in the license plate recognition system, the license plate recognition module usually adopts the method of combining multiple recognition models for license plate recognition, and constructs a hierarchical character recognition process, which can effectively improve the accuracy of character recognition.

On the other hand, before character recognition, using computer intelligent algorithm to preprocess the character image can not only preserve the image information as much as possible, but also improve the image quality, improve the distinguishability of similar characters and ensure the reliability of character recognition. license plate recognition result decision module recognition result decision module, specifically, the decision module makes intelligent decisions on the recognition results by using the historical records left by the process of a license plate passing through the field of vision. The comprehensive reliability evaluation of the license plate is obtained by calculating the measurement values such as the number of observation frames, the stability of recognition results, trajectory stability, speed stability, average reliability and similarity, so as to decide whether to continue to track the license plate, output the recognition results, or reject the results. This method makes comprehensive use of the information of all frames, reduces the accidental errors caused by the previous recognition algorithms based on a single image, and greatly improves the recognition rate of the system and the correctness and reliability of the recognition results. license plate tracking module the license plate tracking module records the location, appearance, recognition results, reliability and other historical information of the license plate of the vehicle in each frame during vehicle driving. Because the license plate tracking module adopts the motion model and update model with certain fault tolerance, the license plates that are blocked or blurred in a short time can still be tracked and predicted correctly, and only one recognition result is output in the end. License plate recognition technology has been widely used in parking lots and community entrances and exits, highway toll stations, highway checkpoints and urban traffic.

The all-in-one license plate recognition machine has excellent imaging control, can automatically track light changes, effectively suppress forward and backward light, especially at night, can suppress the interference of car headlights, so as to clearly capture license plates; In case of no license plate or serious damage of license plate, intelligent traffic management can also be realized; In addition, the off-line operation is also a unique advantage of the all-in-one license plate recognition machine, which can effectively improve the efficiency of vehicle access. Tigerwong parking equipment supplier has focused on parking equipment for many years! If you have any questions about the parking system, welcome to consult and communicate.