基于直线拟合算法的PET瓶瓶盖检测方法

灌装PET瓶的实时自动检测在实际生产中具有重要的作用。在当前生产中，存在着瓶子抖动对图像算法的影响，提出了可以克服上述问题的瓶盖检测方法。采用基于直线拟合算法对灌装PET瓶的实时自动检测算法进行设计，通过对瓶盖所在直线的拟合以及支撑环所在直线拟合，实现了灌装PET瓶的液位缺陷的检测类别判断功能，并且克服了高速生产中瓶子抖动对图像采集以及瓶盖判断的干扰。实际系统监测准确率达到99%以上,实验证明算法有很好的鲁棒性。

PET bottle cap inspection method based on linear fitting algorithm

The actual real-time automatic inspection of the PET bottles plays an important role in production. In the current production, shake of the bottle gives a negative influence on the inspection algorithm. This paper aimed at designing an algorithm which could overcome the problem above. Based on this linear fitting algorithm, this paper designed a real-time automatic detection method. Through inspection of the straight line through the cap and the support ring,the method could categorize the defected cap, and overcame the bottle-shaking caused by high-speed production. The accuracy rate reached more than 99% in the experiments on the online production system. Experiments show that this algorithm has good robustness.