An analytic representation of the fibers (.gad file or .gdt file containing analytic data in GeoDict) is used for the estimation of curvature and curliness in FiberFind.

If such analytic data is available and loaded into the GeoDict GUI, the algorithm works directly on this representation, which can be created e.g. by running a fiber identification with FiberFind (see Identify Fibers). The computation of curvature works for all fibers of one of the curved fiber types available in FiberGeo (Curved Circular, Curved Hollow, Curved Rosetta, Curved Elliptical, Curved Cellulose, Curved Rectangular, Curved Angular). For more details, see the FiberGeo user guide.

If no analytical data is available, i.e., the computation is started on a voxel image, the analytic fiber identification algorithm (i.e., the one available for the Identification Method Analytic) is applied to the structure before the curvature estimation. In that case a warning appears to inform the user:

For the estimation of curvature and curliness in FiberFind, in the FiberFind section, select Estimate Fiber Curvature from the pull-down menu and click the Options’ Edit... button.

In the Fiber Curvature Estimation dialog, enter the desired Result File Name (.gdr).

After the fiber curvature calculations are finished, a Result Viewer for the FiberCurvature.gdr file opens.

Under the Results - Report tab the identified Average fiber curvature (and its Standard deviation) and the Average fiber Curl-Index for the given Number of analyzed fibers are displayed.

Below, a table gives the distribution of fiber curvature, listing the Count Fraction (%) for the ranges of calculated fiber curvatures.

Under the Results - Plots sub-tab, diagrams show the distribution of fiber curvature and fiber curl-index, corresponding to the count fractions for curvatures and curl-index of fibers present in the domain.

In our example, the highest count fractions correspond to fibers with low curvature and low curl-index.