License plate recognition system and license plate recognition method preventing blocking and altering

Abstract

The invention discloses a license plate recognition system and a license plate recognition method preventing blocking and altering. The method comprises the following steps of: firstly, designing an active and passive imaging system by using the regression reflection property of a license plate to realize highlight displaying of a license plate region in an image and lowlight displaying of a vehicle body, other backgrounds and a blocking and altering material; secondly, designing the license plate recognition method preventing blocking and altering to realize blocking and altering discrimination and character recognition; and finally, improving design of the license plates which have widest application. Compared with the conventional license plate recognition system, the license plate recognition system provided by the invention has a function of preventing blocking and altering and improves the degree of intellectualization of the system; meanwhile, the quality of an acquired license plate image is high, a background noise is low, and the license plate image is insensitive to the change of illumination from the outside, so that a bottleneck effect of the quality of an image source on recognition process is overcome to a large extent.

Description

technical field [0001] The invention relates to the fields of intelligent transportation and license plate recognition, in particular to an anti-masking license plate recognition system and a recognition method. Background technique [0002] Intelligent Transportation System (Intelligent Transportation System, ITS) is one of the largest systems engineering in the field of information today, and it is a global hot issue that affects economic development and social progress. ITS refers to the effective integration of advanced artificial intelligence technology, automatic control technology, computer technology, information and communication technology, sensor technology and system engineering technology, and apply them to ground traffic management, so as to establish a large-scale, all-round Functional, real-time, accurate and efficient integrated transportation management system. [0003] Vehicle automation management is the main problem that ITS needs to solve, and license ...

AI Technical Summary

Problems solved by technology

Although there are situations where supplemental light is required (such as night or low-light conditions), the design of existing license plate recognition systems is almost all based on passive imaging conditions, and must deal with adverse factors such as complex backgrounds and lighting changes

Despite advanced image processing and pattern recognition techniques, the quality of image sources is still the technical bottleneck for modules such as license plate location, character segmentation, and character recognition

At the same time, it is not uncommon to block and alter the license plate, which poses new challenges to the license plate recognition system.

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