A fast algorithm for assessing the Gaussian filtered mean line was deduced using the central limit theorem and an approximation method. This algorithm only uses simple computer operations such as addition, subtraction and digit shifting, and avoids complicated ones such as multiplication and division, and therefore, can achieve a very high speed and accuracy without phase distortion. A new relationship between the Gaussian filtering method and the classical 2RC filtering method was also established using this algorithm.
Citation: Journal of American Society for Precision Engineering
Issue: No. 1
Pub Type: Journals
digital filter, Gaussian filter, mean line, surface roughness