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Figure 3
Pixel-wise characterization of the CSPAD detectors. (a, b) Normalized histograms (log scale) for two representative pixels integrated across all detected frames with Gaussian functions fitted to the zero- and one-photon peaks. The black dotted lines correspond to the 0.7 photon threshold used for counting. (c) Two-dimensional histograms of noise and gain estimates placed on grids of 100 × 100 pixels. The red crosses correspond to the values of μ0, μ1 and σ0 shown in the pixel histograms above. (d) Signal-to-noise ratio for all pixels shown as normalized histograms (linear scale).

IUCrJ
Volume 4| Part 3| May 2017| Pages 251-262
ISSN: 2052-2525
https://doi.org/10.1107/S2052252517003591