| abs_invar_fourier_coeff | Normalizing of the Fourier coefficients with respect to the displacment of the starting point. |
| fourier_1dim | Calculate the Fourier coefficients of a parameterized contour. |
| fourier_1dim_inv | One dimensional Fourier synthesis (inverse Fourier transform). |
| invar_fourier_coeff | Normalize the Fourier coefficients. |
| match_fourier_coeff | Similarity of two contours. |
| move_contour_orig | Transformation of the origin into the centre of gravity. |
| prep_contour_fourier | Parameterize the passed contour. |