用面阵CCD摄像机采集中厚板表面图像,对采集到的图像进行形态滤波的Top-Hat变换,并结合阈值处理及连通区域搜索等算法,可以在线检测中厚板的各种表面裂纹缺陷,包括横向裂纹、纵向裂纹、星状裂纹等。根据从生产线上采集到的图像分析了中厚板裂纹缺陷的典型特征,并对形态滤波中的结构元素选取进行了研究。该算法已用在中厚板生产线的表面缺陷在线检测系统中。 With surface array CCD camera to capture the surface of the plate image, the morphology of the collected image filtering Top-Hat transform, combined with thresholding and connected area search and other algorithms that can be detected online in the plate surface defects of various cracks, Including horizontal cracks, longitudinal cracks, star-shaped cracks. Based on the images collected from the production line, the typical characteristics of crack defects in plate and plate are analyzed. The selection of structural elements in morphology filtering is also studied. The algorithm has been used in the on-line surface inspection system of plate production line.