% This Function script is used to extract TRP feature (used to compare) and SP-FD feature
% The related papers:
%  Y. Tang, H. Cheng and C. Suen. â€œTransformation-Ring-Projection(TRP) algorithm and its VLSI implementation,â€ % International Journal of Pattern Recognition and Artificial Intelligence, vol. 5, pp. 25-56, 1991.
%  L. Dong, J. Wang, Y. Li, Y. Tang. "Sector Projection Fourier Descriptor for Chinese Character Recognition"
% IEEE International Conference on Cybernetics, to be appear, 2013.
Li Dong (2021). Sector Projection Fourier Descriptor (https://www.mathworks.com/matlabcentral/fileexchange/42166-sector-projection-fourier-descriptor), MATLAB Central File Exchange. Retrieved .
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