Characterizing Fiber Orientation and Diameter Variability in Nonwovens, 1998 Nonwovens Conference Proceedings
This paper reports on the application of the image analysis methods for characterizing fiber orientation in nonwovens. In our earlier work in this area, we reported on simulation methods as well as three methods (chord tracking, Fourier Transform and Flow Field Analysis) for the measurement of fiber orientation. The chord tracking was found to be the method of choice when a direct measure of orientation was desired. This paper outlines the steps necessary to apply the chord tracking method to real fabrics. In order to deal with real webs, it was found necessary to develop a lighting scheme that resulted in images with sufficient contrast suitable for processing as well as to develop an appropriate thresholding method to obtain data suitable for analysis. Further, it is demonstrated that fiber diameter variation can be determined easily by using a ‘distance transform’ method.
Characterizing Fiber Orientation and Diameter Variability in Nonwovens, 1998 Nonwovens Conference Pr
