Mobile phone cover plate silk-screen defect detection device and method based on machine vision

Abstract

The invention provides a mobile phone cover plate silk-screen defect detection device and method based on machine vision. The method comprises the steps: an industrial camera obtains a to-be-detectedmobile phone cover plate image, a computer carries out binarization, registration and differential processing on the image, and a differential image is obtained; whether there is a defect is determined; and if YES, the defect is classified, and the corresponding mobile phone cover plate is moved to the corresponding position of a recycling box according to a classification result. The device and method have the beneficial effects that according to the technical scheme provided by the invention, detection and classification algorithms are used for researching four defects including window toothpulling, window tooth missing, stains and light leakage in mobile phone cover plate defects, so that detection and classification of the four defects are realized; and the defect detection algorithmis high in adaptability, high-precision detection of cover plate silk-screen defects of different brands and different series of products can be achieved by manufacturing different templates, and thedetection precision is high.

Description

technical field [0001] The invention relates to the field of intelligent detection, in particular to a machine vision-based screen printing defect detection device and detection method for a cover plate of a mobile phone. Background technique [0002] The take-off of high-tech information technology has brought about the upgrading of electronic consumer products, the rapid rise of the mobile phone industry, the sharp rise in sales data, consumers are increasingly demanding on the appearance and quality of mobile phones, and the traditional manual method is used to detect mobile phone covers. The efficiency and accuracy of the silk screen defects of the board are far from meeting the requirements. [0003] According to the screen printing defect samples provided by manufacturers of mobile phone screens and their production process, due to the complex production process of mobile phone screens and high processing precision requirements, different types of defects will inevitab...

AI Technical Summary

Problems solved by technology

[0004] The traditional way of using strong light to irradiate the cover plate of the mobile phone, and professional technicians to identify silk screen defects with the naked eye will do great harm to the technicians. Working in such an environment for a long time will lead to blindness

At the same time, this method is not only difficult to guarantee the accuracy, but also takes a lot of time

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