To meet the requirements of multi-directional choice,a new approach to the invariant feature extraction of handwritten amount Chinese characters was raised,with Ridgelet transform as its foundation.As far as this approach is concerned,first of all,the original images would be rotated to the Radon circular shift by means of Radon transform.On the basis of the characteristic that Fourier transform is row shift invariant,then,the one-dimensional Fourier transform would be adopted in Radon field to gain the conclusion that magnitude matrixes bear the rotation-invariance as a typical feature,which ...
