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Figure 2
Illustration of the variance stabilization of Fly. Left: scatterplot of the sample standard deviation of S (red) as well as the square root of a polynomial approximation [\hat{F}] of F (black), computed on S scaled to the range [0, 1] as a function of its expectation using a fifth-degree polynomial variance model. Middle: the variance stabilizing transformation f for this [\hat{F}]. Right: sample standard deviation of f(S) as a function of its expectation. The standard deviations and f are both computed using Foi (2009BB14) and Azzari & Foi (2014BB3). Every point of the red scatterplot corresponds to the sample mean and sample standard deviation of a narrow segment of the image; the dispersion of the scatterplot is due to the finite sample size of each segment.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 29| Part 3| May 2022| Pages 829-842
https://doi.org/10.1107/S1600577522002739
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