Reconstruction of a closed curve from its elliptic descriptor

This Demo is adapted from the original program written by Christian Brechbuehler at ETH Zürich.

You can change values by moving the sliders; typing in numbers takes effect only when you move any of the sliders. Click on the picture to stop / restart the animation.

A 2D contour is reconstructed from its elliptic Fourier descriptor.

The curious may look at the source code.

Literature

E. Persoon and K. S. Fu. Shape discrimination using fourier descriptors. IEEE Trans. Systems, Man and Cybernetics SMC, 7(3):170-179, March 1977.

F. P. Kuhl and Ch. R. Giardina. Elliptic fourier features of a closed contour. Computer Graphics and Image Processing, 18(3):236-258, March 1982.