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The common-mode methods still correlate, but the default method perhaps over-subtracts because of leakage into the zero-photon peak from neighbor-pixels of real photons.

Crystallography Case

Here are the common mode corrections applied to a crystal diffraction pattern with a strong water ring using algorithms 1 vs 5. Algorithm 5 seems to perform better in this case.

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Common mode histogram using algorithm 1

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Common mode histogram using algorithm 5

Summary for CSPAD

Common mode correction for CSPAD works with algorithm #1 and shows significant effect.

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