包括单区域外边界跟踪、跨缝隙穿毛刺轮廓跟踪、边界平滑与规范化、生成区域凸包过程、微分图像二值化-Outside the region including the single-track border, cross-slot wear burr contour tracking, boundary smoothing and standardization, the process of generating the convex hull area, differential image bi