Image Processing Reference
In-Depth Information
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(i) Plane 2 curve
(a) Plane 1 curve
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(l) Fourier descriptor
(d) Fourier descriptor
(h) Fourier descriptor
Figure 7.18
Example of elliptic Fourier descriptors
Interestingly, there has not been much study on alternative decompositions to Fourier,
though Walsh functions have been suggested for shape representation (Searle, 1970) and
recently wavelets have been used (Kashi, 1996) (though these are not an orthonormal basis
