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图像处理在药片视觉检测系统中的应用
引用本文:朱铭煜,周武能.图像处理在药片视觉检测系统中的应用[J].仪表技术与传感器,2011(5).
作者姓名:朱铭煜  周武能
作者单位:东华大学信息科学与技术学院,上海,201620
摘    要:视觉检测系统可应用于药片自动包装流水线上,其中的图像处理模块经过图像增强、分割、特征提取步骤,最后实现药片包装的缺粒、缺损识别的目的.原始图像由带有CCD传感器的摄像头获取,由于光照不均匀导致图像对比度低.针对此问题,提出了基于高斯低通滤波器模型的灰度补偿方法,然后用阈值曲面去分割图像.结果在像素错分率和形状度这两项性能指标上有一定改进,提高了识别的准确率.在几何特征提取中,提出了一种改进的周长计算方法,加快了检测的实时性.

关 键 词:视觉检测  药片图像  光照不均匀  灰度补偿  阈值曲面  周长

Application of Image Processing in Tablet Visual Inspection System
ZHU Ming-yu,ZHOU Wu-neng.Application of Image Processing in Tablet Visual Inspection System[J].Instrument Technique and Sensor,2011(5).
Authors:ZHU Ming-yu  ZHOU Wu-neng
Affiliation:ZHU Ming-yu,ZHOU Wu-neng(College of Information Science and Technology,DongHua University,Shanghai 201620,China)
Abstract:Visual inspection system was used in the assembly line of tablets automatic packing.Tablets image enhancement,segmentation,and feature extraction were used in the image processing unit to realize the functions of packaging tablets discrimination,such as lack and defects.Original images were obtained from the camera with CCD sensor.Non-uniform illumination causes low contrast.Aimed at the problem,this paper proposed a grey scale compensation method based on Gaussian low-pass filter model.Then it segmented th...
Keywords:visual inspection  tablets image  non-uniform illumination  grey scale compensation  threshold curved surface  perimeter  
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