Elliptical Fourier shape descriptors

Version 1.0.0.0 (3.66 KB) by David Thomas
Forward and reverse elliptical Fourier transforms of x,y data
4.1
(14)
7K Downloads
Updated 23 Oct 2006

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These two functions impliment the system of elliptical Fourier shape descriptors first described by Kuhl and Giardina in "Elliptic Fourier features of a closed contour" Computer Graphics and Image Processing 18:236-258 1982. fEfourier is the forward transform which creates a "shape spectrum" of a closed x,y outline, rEfourier takes a specified number of harmonics from the spectrum and reconstructs the x,y outline. The functions are not only useful for the creation of shape descriptors but also for smoothing outlines or reducing an arbitrary outline to a specified number of points.

Cite As

David Thomas (2024). Elliptical Fourier shape descriptors (https://www.mathworks.com/matlabcentral/fileexchange/12746-elliptical-fourier-shape-descriptors), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2006a
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Version Published Release Notes
1.0.0.0