interface_build {
    {i.fft} 0
    {Fast Fourier Transform (FFT) for image processing.}
    {entry input_image {Input raster map on which the FFT is run:} 0 raster}
    {entry real_image {Output real part arrays stored as raster map:} 0 raster}
    {entry imaginary_image {Output imaginary part arrays stored as raster map:} 0 raster}
    {entry range {Range of values used during FFT:} 0 ""}
}