Double 3-dimensional transform Double transf. Original data Ratio real imag. real imag. real imag. 69.62 302.87 0.14 0.59 512.00 512.00 427.71 298.35 0.84 0.58 512.00 512.00 209.25 347.17 0.41 0.68 512.00 512.00 453.56 221.77 0.89 0.43 512.00 512.00 The product of transform lengths is: 512