胶片缺陷在线检测方法的研究

Study on On-line Inspection of Film Quality

介绍了新研制的胶片质量在线检测系统。它采用 CCD红外成像和基于 Visual C++6.0的应用软件 ,综合运用低通滤波、边缘提取及投影检测等处理技术 ,对胶片缺陷的检测速度达到了 60 m/ min。实验证明 ,该系统运行稳定 ,检测准确率达到 98%以上 ,对于直径大于等于 1m m或直径虽小于 1mm但与背景有明显对比度的缺陷 。

An on line defect inspection system of film was developed in our laboratory,which runs in high speed of maximum 60 m/min.The infrared images are obtained with a high quality and high speed CCD camera and processed in real time,by means of such algorithm as low pass filtering,edge detection and projection,etc.Experimental results show that accuracy rate of the system is upwards of 98 %,and that the system can inspect defects with the size of greater than or equal to 1 mm,and defects with the size of less than 1 mm if it has enough contrast to background.