Camera license plate recognition system and recognition implementation method

Abstract

The invention discloses a camera license plate recognition system and a recognition implementing method. The vehicle license plate recognition system comprises a license plate recognition camera device installed at the entrance of a ramp and is used for detecting license plates at the front ends of passing vehicles; and the license plate recognition camera device includes a sensor for converting optical signals into video signals, a video processing main chip used for performing wide dynamic processing, noise reduction, 3A and color correction processing on the video signals, and an DSP chip used for realizing a license plate recognition algorithm, wherein the video processing main chip duplicates images and inputs the images into a coding unit and a license plate recognition DSP unit. According to the camera vehicle license plate recognition system of the invention, the resolution of the license plate recognition camera can achieve 1080P, and therefore, the camera license plate recognition system has the advantages of high image resolution, clear images and high recognition rate of license plates; a ground induction coil is not required to be pre-embedded to carry out triggering, so that construction is convenient; and the front end of the camera license plate recognition system can realize the license plate recognition algorithm, so that the burden of the back end of the system can be decreased, large-scale multi-channel project system design can be facilitated.

Description

technical field [0001] The invention relates to video analysis and image recognition. The license plate is searched and the license plate number is identified through image analysis, and in particular relates to a camera license plate recognition system and a recognition implementation method. Background technique [0002] Vehicle License Plate Recognition (VLPR) refers to a technology that can detect vehicles on the monitored road and automatically extract vehicle license plate information (including Chinese characters, English letters, Arabic numerals and license plate colors) for processing. [0003] License plate recognition is one of the important components of modern intelligent transportation systems, and it is widely used. Based on digital image processing, pattern recognition, computer vision and other technologies, it analyzes the vehicle images or video sequences captured by the camera, and obtains the unique license plate number of each car, thus completing the r...

AI Technical Summary

Problems solved by technology

[0009] 1. Front-end recognition, add a license plate recognition algorithm to the camera, such as running a red light to take pictures, traffic checkpoints, these systems are pre-embedded with a ground sense coil, when the vehicle triggers the ground sense coil, the license plate recognition algorithm starts to work, and the recognized license plate No. and corresponding pictures are saved, and the implementation needs to pre-embed the ground induction coil, which increases the cost and makes the construction inconvenient

[0010] 2. Recognition at the back end, use the ordinary gun camera to send the video to the back-end license plate recognition system, analyze the image frame by frame in real time, and then search for the license plate and identify it. This method has low requirements for the front end and is convenient for construction, but the video processed at the same time The number of channels is limited, and there is no problem with a small number. If multiple channels are required at the same time, it is difficult to handle

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