应用对称匹配的PET 瓶瓶盖缺陷实时检测

doi:10.3969/j.issn.0255-8297.2014.06.011

Abstract

Abstract: On a high-speed production line, tilt of bottles, burrs on the bottleneck, and residual droplets after
cleaning affect accuracy of PET bottle inspection. To deal with the problem, a bottle detection algorithm
based on symmetry matching is proposed. Considering symmetry of the bottle image, the bottle axis can
be determined accurately by registering the images before and after horizontal flipping. Thus tilts can be
compensated. Burrs and droplets are eliminated by using correlation of pixels on both sides of the axis.
Consequently, the support rings can be detected and bottle caps can be classified precisely. Experimental
results show high accuracy, speed and robustness of the proposed algorithm as compared with the state-of-theart
techniques. For images sized 640×480, the average detection time is 27.4 ms, which meets the requirement
of high-speed production lines.

Key words: PET cap, symmetry matching, image registration, real-time inspection

CLC Number:

TP391

WANG Gui-jin1, LIU Bo1, HE Bei1, ZHANG Shu-jun2, MENG Long2. Real-Time PET Cap Defect Inspection Based on Symmetry Match[J]. Journal of Applied Sciences, 2014, 32(6): 617-624.

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URL: https://www.jas.shu.edu.cn/EN/10.3969/j.issn.0255-8297.2014.06.011

https://www.jas.shu.edu.cn/EN/Y2014/V32/I6/617

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Real-Time PET Cap Defect Inspection Based on Symmetry Match

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