.pynufft_cpu.py 文件源码

def xx2k(self, xx):
        '''
        fft of the image
        input:
            xx:    scaled 2D image
        output:
            k:    k-space grid
        '''
#         dd = numpy.size(self.st['Kd'])      
        output_x = numpy.zeros(self.st['Kd'], dtype=self.dtype,order='C')
#         output_x[crop_slice_ind(xx.shape)] = xx
        output_x.flat[self.KdCPUorder]=xx.flat[self.NdCPUorder]
        k = numpy.fft.fftn(output_x, self.st['Kd'], range(0, self.ndims))

        return k