关于图像亚像素边缘检测方法的相关文献 （薄片零件机器视觉图像亚像素边缘检测，机器视觉标定中的亚像素中心定位算法，机械零件亚像素边缘检测算法的研究，基于分层插值和最小二乘拟合的亚像素细分算法等等。）-Literature on the image sub-pixel edge detection method (thin parts machine vision image sub-pixel edge detection, sub-pixel target location in the calibration of the machine vision, machine parts sub-pixel edge detection algorithm, based on the hierarchical interpolation and least squares subpixel fitting algorithm, and so on.)