基于机器视觉的高密度针脚检测光源的设计

Design of High Density Pin Detection Light Source Based on Machine Vision

目前高密度针脚由于其针脚短、细、小,工业上使用视觉检测方式对针脚缺陷进行检测时主要的难点在于:如使用LED照明光源,由于光源发光角度大,搭配成像系统拍摄的图片的缺陷特征不明显;如使用聚光效果好的激光光源会有明显的散斑现象,都会使得后续图像处理很难提取有效的特征值,降低了针脚检测的效率。

At present, high-density stitches are short, thin, and small, and the main difficulties in the detection of stitch defects using the visual inspection method in the industry are： If an LED lighting source is used, the light emitting angle of the light source is large, and a picture taken with the imaging system is taken. The defect features are not obvious; if a laser light source with a good light collection effect has a significant speckle phenomenon, it will make it difficult to extract effective feature values for subsequent image processing and reduce the efficiency of stitch detection.