为提高带钢表面缺陷图像去噪处理中滤波器的去噪性能,更好地保留缺陷图像细节信息,在研究了偏微分方程理论的基础上,分析了AMSS(affine morphological scale space)方程的对比不变性和仿射不变性,采用有限差分法实现了AMSS算子的方法.将AMSS算子应用到带钢表面缺陷图像去噪处理的试验表明,该方法达到了既去除噪声,又保留图像细节信息的效果. In order to improve the denoising performance of the filter in the image denoising of strip surface defects and preserve the details of the defect image better, based on the theory of PDEs, the contrast of the AMSS (affine morphological scale space) equation Invariance and affine invariance, the method of finite difference method is used to realize AMSS operator.Experimental results of applying AMSS operator to image denoising on the surface of strip steel show that this method can achieve both the removal of noise and the preservation of image detail The effect of information.