| 彭玉,王耀南,周显恩,蒋笑笑,郑叶欣.基于轮廓曲率的PET瓶防盗环断裂检测[J].电子测量与仪器学报,2017,31(3):422-429 |
| 基于轮廓曲率的PET瓶防盗环断裂检测 |
| PET bottle tamper evident bandbroken detection based on contour curvature |
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| DOI：10.13382/j.jemi.2017.03.014 |
| 中文关键词: 亚像素边缘 角点检测 轮廓曲率 瓶盖缺陷 |
| 英文关键词:sub pixel edge corner detection contour curvature bottle cap defects |
| 基金项目:国家自然科学基金(61573134)资助项目 |
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| Author | Institution |
| Peng Yu | National Engineering Laboratory for Robot Visual Perception and Control Technology, HunanUniversity, Changsha 410082, China |
| Wang Yaonan | National Engineering Laboratory for Robot Visual Perception and Control Technology, HunanUniversity, Changsha 410082, China |
| Zhou Xian’en | National Engineering Laboratory for Robot Visual Perception and Control Technology, HunanUniversity, Changsha 410082, China |
| Jiang Xiaoxiao | National Engineering Laboratory for Robot Visual Perception and Control Technology, HunanUniversity, Changsha 410082, China |
| Zheng Yexin | National Engineering Laboratory for Robot Visual Perception and Control Technology, HunanUniversity, Changsha 410082, China |
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| 中文摘要: |
| 针对现有满瓶检测算法中缺乏聚对苯二甲酸乙二酯（polyethylene terephthalate，PET）瓶防盗环断裂检测算法的问题，提出一种基于轮廓曲率计算和角点检测的防盗环断裂检测算法。首先采用灰度投影法大致定位出瓶盖区域并将瓶盖所在的矩形区域设置为感兴趣区域(ROI)，再利用梯度极大值抑制法获取瓶盖边缘点，并根据提出的等腰三角形法和最近点搜索法，拟合边缘点的亚像素坐标并连接瓶盖轮廓。然后利用边缘点的路程距离比（stretch to distance ratio，SDR）来近似表示轮廓曲率，再根据轮廓曲率极大值检测角点，并采用角点匹配法定位支撑环。最后根据支撑环和防盗环之间存在缝隙与否，来判断防盗环是否断裂。该算法检测正确率达到94.75%，可满足生产需要。 |
| 英文摘要: |
| In the paper, a polyethylene terephthalate (PET) bottle tamper evident band broken detection algorithm based on contour curvature and corner detectionis proposed to solve the problem that no existing algorithm concentrates on PET bottle tamper evident band breakage detection.Firstly, the bottle cap area is roughly located by grayscale projection and the rectangular area ofthe cap is set to region of interest(ROI). Then, the cap edge point is obtained by gradient maxima suppression method,the sub pixel edge is fitaccording to the given law isosceles triangle, and the bottle cap contour is connectedthrough the nearest point search method.And then,the stretch to distance ratio(SDR) of edge point is used to approximate the contour curvature,the corner points are detectedbased on maximum contour curvature, and the support ringis locatedby corner matching method. Finally, whether the tamper evident band broken is determined according to whether or nota gap exist between supporting ring and the tamper evident band.The algorithm detection correct rate is 94.75%,it meetsproduction needs. |
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