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《China Mechanical Engineering》 2014-01
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Measurement Algorithm of LCD Mounting Dimension Based on Machine Vision

Xiao Min;Zhuang Chungang;Xiong Zhenhua;Shanghai Jiao Tong University;  
This paper presented an algorithm to measure the distance between the displaying area and the frame of LCD.In this algorithm,a Hough transform and a least square fitting method were combined.First,the Canny operator was implemented to find the edges of the displaying area and the frame of LCD.Second,a line position with low-precision was located using the Hough transform, and the point set near the line can be detected after that.Finally,the least square fitting method was applied to obtain the precise line edges,and then the distance between the displaying area and the frame can be computed.The experiments show that the algorithm proposed herein has relatively higher precision and efficiency.The measurement algorithm has been applied to online inspection of LCD products.
【Fund】: 国家重点基础研究发展计划(973计划)资助项目(2013CB035804);; 国家自然科学基金资助项目(U1201244)
【CateGory Index】: TP391.41
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