[3] HUM K. Visual pattern recognition by moment invariants[J]. IEEE Trans. On Information Theory, 1962,8:179-187.
[4] WONG Y R. Scene matching with invariant moments[J]. Computer Graphics and Image Processing, 1978,8:16-24.
[5] CHEN CH CH. Improved moment invariants for shape discrimination[J]. Pattern Recognition, 1993,26 (5) : 683-686.