[1] [1] Shridhar M, Badreldin A. High accuracy character recognition algorithm using Fourier and topological descriptors. Pattern Recognition, 1984, 17(5):515～524

[2] [2] Persoon E, Fu K S. Shape discrimination using Fourier descriptors. IEEE Trans. SMC, 1977, 7(3):171～179

[3] [3] Wallace T P, Wintz P. An efficient three-dimensional aircraft recognition algorithm using normalize Fourier descriptors. Computer Graphics and Image Processing, 1980, 3(2):99～126

[4] [4] Venugopal K P. Invariant recognition of 2D objects using Alopex neural network. Proc. SPIE, 1992, 1709:182～190

[6] [6] Vogl T P, Mangis J K, Riglev A K et al.. Accelerating the convergence of the back-propagation method. Bio. Cyber., 1988, 59(4):257～263

[7] [7] Gupta L. A neural network approach to robust shape classification. Pattern Recognition, 1990, 23(6):563～568

[8] [8] Casasent D P. An optical correlator feature extractor neural net system. Opt. Engng., 1990, 31(5):971～978