//fft2d(x, y) = matricize(x, y) : output(x, y);
fft2d(x, y) = normalize(GREY_MAX) : matricize(x, y) : lines_fft(x, y) : matrix_transpose(x, y) : lines_fftc(y, x) : matrix_transpose(y, x) : norm_out(x, y);
//fft2d(x, y) = matricize(x, y) : output(x, y);
fft2d(x, y) = normalize(GREY_MAX) : matricize(x, y) : lines_fft(x, y) : matrix_transpose(x, y) : lines_fftc(y, x) : matrix_transpose(y, x) : norm_out(x, y);