The relation between the correlation function of intensity variation and surface roughness parameter is derived through analyzing the second-order statistical properties of the speckle image.
分析此散斑图像的二阶统计特性，导出了强度变化的相关函数和表面粗糙度参数之间的关系。
By the means of surface profile equipment, the machined surface was measured and the statistical parameter of surface topography was calculated.
通过表面轮廓仪测量加工试件表面形貌，采用自行研制的表面形貌参数表征系统进行表面形貌统计参数计算。
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