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  • Analysis of machine vision character recognition detection technology

    日期:2013/5/3  阅读3397次

     In the global processing industry, China can be described as big manufacturing country, is known as the "factory of the world". With intense global competition, China's manufacturing industry has made great strides. However, exquisite design, complex process, strict quality, enormous challenges to the processing plant production. Reduce the generation of waste, improve quality control, processing industry is facing an important topic.

    Currently, many types of industrial products, a wide range of applications, closely related to people's lives, much of it contain a text message. Such as air conditioning, remote control, mobile phone keyboard and screen, automobile, motorcycle dashboard, motor vehicle license plate recognition, auto fuse, printing and packaging, food packaging, RMB number. All these items have character, the character in automated print production process, may be brought into the defects, resulting in the generation of the defective article.
    In this situation, according to industry needs for domestic manufacturing beautifully designed, complex process, strict quality requirements, machine vision character recognition detection technology came into being.

    Now, with the rapid development of the computer and machine vision technology, detection of machine vision Character Recognition (OCR and OCV) technology in the world has been rapid development. Automatic machine vision character recognition detection technology not only to overcome the shortcomings of the manual inspection method, and detection and recognition speed, high precision, reliable test results, stability and other advantages, so more and more processing plants began to introduce automatic character identification detection system. Currently, the system has been successfully used in chip manufacturing, AOI, food, and other fields of quality testing. The following figure is an example of typical character of industrial products automatic identification number.

    Character recognition of machine vision detection system using state-of-the-art image visual detection technology, real-time and comprehensive quality testing to achieve high-speed movement of industrial products. When the system is equipped with a high-performance industrial digital cameras, the cameras capture an industrial surface image, and the image data is transmitted to the image processing system, the image processing system for each image preprocessing, extracting a character region, and identify the character region waste output alarm information and control signals, and the waste is removed by a mechanical system or classified.

    Character recognition of machine vision inspection system, it is possible to accurately identify the character region and identify the core of the whole system. Its field of application is mainly related to the following aspects:
    , Medical aspects: the detection of drugs trademark, production date, batch number;
    Semiconductors: Verify the wafer and IC packaging code;
    3, machine: Control the quality of printed characters of machine parts;
    Logistics: classification, tracking of mail and parcels;
    5 car: read characters and numbers on auto parts.