This paper reports on the application of te image analysis methods for characterizing fiber orientation in nonwovens.In our earlier work in htis area,we reported on simuulation methods as well as three methods (chord tracking,fourier Transform and Flow Field Analysis) for the measurement of fiber orientation.The chord trackign 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 ral fabrics.In order to deal with real webs,it was found necessary to develop a lighting scheme that resulted in images with sufficieent 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 cna be determined easily by using a 'distance transform' method.
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