2Deriche R. Using Canny's criteria to derive a recursively implemented optimal edge detector [J]. International Journal of Computer Vision, 1987,1 (2):167一187.
4Hu M K. Visual pattern recognition by moment invariants[J].IRE Transactions on Information Theory, 1962,8(2):179-187.
5Khotanzad A,Hong Y H. Invariant image recognition by Zernike moments [J]. IEEE Transactions on Pattern Analysis and Machine Intelligence, 1990,12(5):489-497.