关键词: 表面粗糙度, 机器视觉, 测量, 阈值

Abstract:

A non-contact surface roughness inspection method based on machine vision was used to assess different cylindrical grinding surfaces from 01μm to 08μm in different ambient light environment. A new method that counts the pixel numbers whose gray value is larger than sum of the Otsu threshold and a given constant was proposed to represent different roughness in surface inspection.This method was compared with the methods based on standard deviation of gray-level distribution proposed by Luk and the gray-level co-occurrence matrix.Results show that variance sum between inspecting values of the proposed method and its corresponding real value is less than half of the other two ways. 

Key words: surface roughness, machine vision, measurement, threshold