Crossing-The-Line Segmentation as a Basis for Rsm and Rc Evaluation
J Seewig, Paul J. Scott, Matthias Eifler, Benjamin G. Barwick, Dorothee Hüser
Abstract
Abstract Feature characterization of rough surfaces is of growing interest in terms of a function oriented description of technical surfaces. Feature characterization requires a segmentation of significant hills and dales of the measured profile. The segmentation can be done in several ways. One method is the so called crossing-the-line segmentation which will be part of ISO 16610 part 45 and ISO 21920 part 2. The crossing-the-line segmentation described in this publication represents an extension of the algorithm proposed by Scott (Scott P, 2006, Meas. Sci. Technol. 17 , 559–564) and is based on new knowledge gathered over the last ten years. As an example, the feature parameters <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>R</mml:mi> <mml:mi>S</mml:mi> <mml:mi>m</mml:mi> </mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>R</mml:mi> <mml:mi>c</mml:mi> </mml:math> according to ISO 4287:1997 are evaluated.