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fourier descriptor

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describe shape using fourier coefficients

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Description

shape description using FD fourier coeeficeients used for shape classification.
the steps :
1 . find the indexes borders of edged image (input binary edged image see test for example)
2. sort the indexes so they in distance order
3. make complex vecotr x+jy
4 make fft
5 take first FD
6. make ifft

currently the algorithm works for only symmetrical shapes !!!
 i promise to improve it for all the shapes

link to theory :
http://www.tsi.enst.fr/tsi/enseignement/ressources/mti/descript_fourier/Part1.html

http://www.tsi.enst.fr/tsi/enseignement/ressources/mti/descript_fourier/Part2.html

Required Products Image Processing Toolbox
Signal Processing Toolbox
MATLAB release MATLAB 7 (R14)
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