× f1(m,n)的2D—DFT和2D—DCT如下:①f1(m,n)的2D—DFT。根据2D—DFT的计算公式F(u,v)= 并利用2D-DFT的可分离性,有F(u,v)=2D-DFT[f(m,n)]=1D-DFTn{1D-DFTm[f(m,n)]}=1D-DFTn[F(u,n)]或F(u,v)=2D-DFT[f(m,n)]=1D—DFTm(1D—DFTn[f(m,n)]}=1D—DFTm[F(m,v)]由...