Reconstruction of a closed curve from its elliptic descriptor

There are three sliders on the bottom of the window. The first slider sets a delay between frames. The second slider changes the number of ellipses used in the reconstruction. The third slider changes the number of sample points used for the reconstruction. If the applet gets confused or hung, try reloading the page.

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

This is a copy of the original demo webpage by Christian Brechbuhler, with some cleanup done by Sean Ho to FourDem.java so as to use AWT Scrollbar instead of AWT Slider.