An In-line Digital Filtering for the Real-time Processing of the Surface Roughness Profiles (1st Report)

An Application of Running-Box-Function Filter

Abstract

The authors develop a fast-processing algorithm of low- and high-pass Gaussian digital filters executed while one discrete data of traced profile is sampled. In this report, the 8-step modified running-box-function filter is newly presented. The transmission characteristics of this new filter are very close to those of Gaussian digital filter provided by ISO 468-1982. Furthermore, the conditions to utilize this filter are shown for a practical use.