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Figure 5
The numerically calculated SNR as function of the number of patterns. The signal is the standard deviation of the noise-free calculation and the noise level is calculated from the difference between the variance of each noisy simulation and that of the noise-free simulation. The increase of the SNR is proportional to Nα1/2, as predicted by the theory in Appendix B[link].

IUCrJ
Volume 4| Part 1| January 2017| Pages 24-36
ISSN: 2052-2525
https://doi.org/10.1107/S2052252516016730