§4.6二维离散傅立叶变换的性质 f(x,y)(-1)+y台F(u-M/2,v-N/2) (0,0)N/2N-1 (0.0)N/2N-1 E(0.0) M/2￥ M/2 M M-1 Four adjacent quarter periods meet here =MX N data array computed by the DFT with f(x.y)as input =MX N data array computed by the DFT with f(x.y)(-1)y as input …=Periods of the DFT§4.6 二维离散傅立叶变换的性质