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Figure 2
Decoded photon count values [N^{\,{\prime}}_{{i}}] as a function of original photon counts Ni for various lossy encoding schemes. Schemes (a), (b), and (c) are the main methods we test below, with all three schemes using equations (4)[link] and (5)[link] with values of Dr as shown in Table 1[link]. We also show a lossy encoding scheme used by Wakonig et al. (2020BB45) which uses equations (2)[link] and (3)[link] with QS = 0.5, though the Wakonig scheme is not easily implemented in per-pixel ASIC circuitry due to its use of non-integer square root and division operations. All methods except for scheme (c) produce decoded values [N^{\,{\prime}}_{{i}}] that are within one standard deviation [\sqrt{N_{{i}}}] of the original values Ni (indicated by the blue shaded area) for Ni up to 64 counts, using the Poisson distribution with a mean equal to each value of Ni.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 28| Part 1| January 2021| Pages 292-300
https://doi.org/10.1107/S1600577520013326
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