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Figure 3
(a) A histogram of raw pixel values in a representative frame. It shows an exponential distribution with the hottest pixel value of 1200. Importantly, all pixel values below the maximum are present. (b) A histogram of the hottest pixels with a peak at 500, as most hits share more than half of the intensity with their neighbours and the central pixel only gets 500 out of 1200. Including the surrounding pixels in a 3 × 3 area or 5 × 5 area, we get a sharp peak around 1200, which shows that every photon creates the same intensity, just spread over multiple adjacent pixels.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 33| Part 5| September 2026|
https://doi.org/10.1107/S1600577526006508
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