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Figure 3
(a) Anisotropic peaks are healed using symmetry analysis. The I(qx,qy) image is remeshed into a [I(q,\chi)] representation. Each peak is analyzed in turn to determine its symmetry. Based on the calculated symmetry, the experimental data for this region are copied repeatedly into gaps (with shifts along χ consistent with the determined symmetry). Any remaining gaps in the isotropic background are filled using the one-dimensional curve (circular average). (b) The symmetry of an incomplete [I(\chi)] curve is assessed by calculating the residuals between the experimental data and various model curves (3 examples are shown). The model curves are generated by copying and averaging the curve with a shift determined by the symmetry.

IUCrJ
Volume 4| Part 4| July 2017| Pages 455-465
ISSN: 2052-2525
https://doi.org/10.1107/S2052252517006212