Chinese character recognition method for identification cards

Abstract

The invention provides a Chinese character recognition method for identification cards. The Chinese character recognition method comprises the following steps: acquiring a classifier training file; transforming a color image to be recognized into a gray scale image; accurately positioning a Chinese character region of each identification card; carrying out character recognition on each Chinese character region; judging whether the current Chinese character region is the last Chinese character region. According to the Chinese character recognition method provided by the invention, positioning and segmentation of Chinese characters of the identification cards can be carried out by adopting an image processing technology; character recognition is carried out on a Chinese character image on the basis of a tessract library and font structure quality enhancement; the recognition accuracy is higher, no specific equipment is needed, the cost is low and information of multiple identification cards can be simultaneously read.

Description

Technical field [0001] The invention relates to the technical field of image processing, in particular to a method for identifying Chinese characters in an ID card. Background technique [0002] An ID card is the only valid document to prove the legal status of a citizen. It is a document necessary for citizens to participate in various political, economic and social activities, such as: entering the event venue, applying for a bank card, checking in a hotel, taking a plane or train, Internet cafes, and handling various Class qualification certificates, etc. It can be said that ID cards have penetrated into all aspects of our lives. Therefore, how to quickly and accurately read ID card information becomes more and more important. [0003] Currently, the commonly used technical methods for reading ID card information are as follows: [0004] (1) Based on the ID card reader to read information, this type of method is based on the characteristics of my country's second-generation res...

AI Technical Summary

Problems solved by technology

The advantages of this type of method are: the accuracy of reading information is very high; it has strong resistance to the stain and wear of the ID card; it does not depend on visible light and can be used in harsh environments such as dust; but it also has Obvious disadvantages: special card reading equipment is required, and the equipment cost is high

The advantages of this type of method are high accuracy, no need for specific equipment, low hardware cost, strong adaptability to various environments, and simultaneous reading of multiple ID card information; the disadvantage is that it is mainly for the digital part of the ID card , for Chinese characters, the accuracy is low, so this also limits the wider application of this type of method

[0006] Since there are more than 3,000 commonly used Chinese characters in our country, the commonly used machine learning methods cannot be directly applied to the recognition of Chinese characters on ID cards. At present, the most popular open source Chinese character recognition library is Google's tessract library, but the image quality of Chinese characters in this library is not The requirements of the font structure are very high. If it is directly used to identify the Chinese characters of the ID card, the accuracy rate is only 60%, which cannot meet the actual application requirements.

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