參考：
[1] Teague M R. Image analysis via the general theory of moments[J]. JOSA, 1980, 70(8): 920-930.
[2] Hwang S K, Kim W Y. A novel approach to the fast computation of Zernike moments[J]. Pattern
Recognition, 2006, 39(11): 2065-2076.
[3] http://www.mathworks.com/matlabcentral/ leexchange/38900-zernike-moments