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CartesianDiatom-EFA
is run from the
Main Menu selection CDiatom, which is located at or near the right
end of the Main Menu, by selecting Outlines. Submenu items are provided
for importing data from external files, conducting the elliptical Fourier
analysis and reproducing outlines.
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The
elliptical Fourier analysis spans 5 Excel worksheets:
OrigOutline, EFA, EFAResults, EllipDescr and ReproOutl (left to right,
respectively, in the adjacent figure).
Detailed explanations of each worksheet and forms associated with it are available by following the worksheet's link below. Overview of this EFA program. |
Worksheet
& Form
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Contents
& Operations
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Smooths
and samples original coordinates, normalizes outlines with respect to
location, orientation, size and trace origin, previews smoothing, sampling
and results of EFA on a single selected valve, sets parameters for and
executes EFA on single or all valves, exports results to EFAResults worksheet,
and displays chart of outlines of original, smoothed-and-sampled and reproduced
outlines (for k and k-1 harmonics)
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Accumulates
the results of the EFA, stores basic valve descriptors, identification
codes, processing information, elliptical Fourier coefficients and harmonic
amplitudes
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Accumulates
the results of the EFA expressed as the "elliptical descriptors"
of Schmittbuhl et al. (2003), which emphasize
familiar parameters of ellipses to describe the effects of the harmonics
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Reproduces
outlines of selected valves based on their Fourier coefficients from EFAResults
worksheet
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Updated 1 July 2009 RKE