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Figure 4
The difference between the estimated background value either with no outlier handling or with the GLM algorithm, and the median (i.e. most robust) background estimate for Bragg reflections with large indices of dispersion in the surrounding background pixels (an indication of the presence of pixel outliers) for (a) thaumatin, (b) DNA and (c) thermolysin. The horizontal black lines in each plot are at ln(2) and -1/3; for a Poisson distribution, the bounds on the median are [\lambda - \ln(2) \le {\rm median} \,\lt\, \lambda + 1/3] (Choi, 1994BB3).

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 49| Part 6| December 2016| Pages 1912-1921
https://doi.org/10.1107/S1600576716013595
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