Short-time Fourier transform method for online glass ream inspection

Li Anding; Chen Youping; Xie Jingming

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Short-time Fourier transform method for online glass ream inspection

机译：Short-time Fourier transform method for online glass ream inspection

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摘要

In the float glass defect inspection system based on machine vision, the common defects can be detected and classified correctly. However, the online glass ream inspection is still a problem to be solved, and the accuracy cannot fulfill the requirement of glass grading. As the glass ream is a rather slight optical distortion in most cases, it should be amplified so that it can be checked out easily. A Moire method based on the theory of superposition shadow is proposed, which can magnify the distortion effectively without increasing the system complexity, and a STFT method is presented to analyze the distortion according to the characteristics of Moire fringe pattern. With this method, the vision interference angle of glass ribbon can be calculated out accurately in real time, which makes it suitable for online glass ream inspection. (C) 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)

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来源
《Optical Engineering》 |2016年第8期|083109-1-083109-8|共8页
作者
Li Anding; Chen Youping; Xie Jingming;
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作者单位

Huazhong Univ Sci & Technol, Engn Res Ctr Numer Control Syst, Sch Mech Sci & Engn, Adv Mfg Bldg,Room C413, Wuhan 430074, Peoples R China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类计量学;光学仪器;
关键词
short-time Fourier transform; Moire fringes; machine vision; defect inspection; glass ream; vision interference angle;

Short-time Fourier transform method for online glass ream inspection

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