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Figure 5
Center of rotation error (COR) recovered using the phase symmetry and phase correlation methods when using a relection pair of images obtained at rotational angles that are not exactly 180° apart: that is, with at angles θ′ and θ′ + 180° + Δθ. At each instance of SNR (Table 1[link]), 100 instances of Poisson noise were generated. At the top we see the mean values for the recovered COR values from the phase symmetry (a) and phase correlation (b), while in the bottom row we see the standard deviation of the recovered COR values from the phase symmetry (c) and phase correlation (d) methods. Both methods deviate away from the true center as Δθ gets further from 0°, but with slightly less error and considerably lower fluctuations when using the phase symmetry approach.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 29| Part 2| March 2022| Pages 488-495
https://doi.org/10.1107/S1600577521012777
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