It can pretreat thepictures to make the picture with narrow gray-level range of the original graphitestructure clear and the graphite overhanging, pick the coarse and black graphite structureby using the edge-measuring method.

• 针对石墨化部分原始图片灰度区间窄的特征,通过图像预处理使图像清晰,突出石墨组织,采用边缘检测方法,提取出要检测的粗大呈黑色的石墨组织。