Figure 6 (a) Comparison of the correlation functions determined by the IFT [red, from Fig. 3(b)], SVD [blue, from Fig. 4(b)] and KA [green, from Fig. 5(b)] at zero field. Dmax = 22 nm was determined by the IFT. (b) Comparison of the correlation functions determined by the IFT (red), SVD (blue) and KA (green) when Dmax is fixed to 50 nm.