说明：  　Wavelet t ransform and projection were referred to after wavelet t ransform projection and se2 quential similarity detection algorithm(SSDA) were applied to the low f requency part of the image to get a set of potential matching point
(Wavelet t ransform and projection were referred to after wavelet t ransform projection and se2quential similarity detection algorithm (SSDA) were applied to the low f requency part of the image to get aset of potential matching point)