License plate character sequence identification method and device in license plate type identification

Abstract

The invention discloses a license plate character sequence identification method and device in license plate type identification. The license plate character sequence identification method comprises the following steps: carrying out binary processing on a candidate area where a license plate exists, pre-processing the candidate area for removing interference out of the candidate area where the license plate exists, determining left and right borders of each character according to relationship between the sum of projection values of each column in the vertical direction and a projection threshold, combining the character areas according to the width of the areas where the characters exist, removing interference of fake characters on the character identification process, and determining a license plate character sequence according to the number of the characters and the distances among the characters. Because the license plate character sequence identification method is realized by adopting linear logic in the identification process, a realization program is simple. In addition, any limits do not exist in the identification process, the use scope is wide, the influence of the interference in the identification process is reduced, and the accuracy for identifying the license plate characters is improved.

Description

technical field [0001] The invention relates to the technical field of computer image processing, in particular to a method and device for recognizing a character sequence of a license plate in the type recognition of a license plate. Background technique [0002] With the development of social economy, the number of vehicles continues to increase, so it is inevitable to manage vehicles through computerized and intelligent solutions. In the prior art, license plate recognition plays an important role in the field of intelligent transportation, and it has a wide range of applications in traffic flow monitoring, highway bayonet toll collection, red light violation vehicle monitoring, and community automatic toll collection systems. [0003] The existing license plate type recognition process mainly includes several main steps: license plate location, license plate correction, license plate character segmentation and character recognition. The character segmentation step is a ...

AI Technical Summary

Problems solved by technology

[0009] In view of this, the embodiment of the present invention provides a license plate character sequence recognition method and device in the license plate type recognition to solve the limitations of the character segmentation method in the prior art license plate type recognition process, which cannot be better solved. The problem of recognizing license plate character sequence

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