Surface Roughness Evaluation of Turned Surfaces Using Wavelet Packet Transform

Abstract

The surface roughness is a measure of the deformation of a surface resulting from various machining process. The measurement of surface roughness is categorized in two ways, the contact method and the non-contact method. The first method involves the direct contact of the measuring instrument with the specimen being measured. The latter method avoids contact with the specimen being measured such as vision system. In this paper using the non-contact method the prediction of surface roughness values of turned surfaces are explained with the application of wavelet packet transform and image processing. The paper also shows the comparison of the measured value and the predicted value.