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This module averages over events the per-pixel data of the image array (ndarray<double,2>) and saves two files for averaged and rms values. Input data can be specified by the source and key parameters. Averaging may have up to three stages, depending on configuration parameters:

• 0-stage: the portion of pixel amplitudes are averaged without any constrains for events from 0 to evts_stage1 is averaged without any constrains, the preliminary averaged and rms values are defined for each pixel at the end of this stage.
• 1-stage: starting from event evts_stage1 the pixel data are collected only for abs(amplitude-average0) < gate_width1. At the end of this stage the preliminary averaged and rms values are defined for each pixel.
• 2-stage: starting from the event evts_stage1 + evts_stage2 the pixel data are collected only for abs(amplitude-average1) < gate_width2. At the end of this stage the preliminary averaged and rms values are defined for each pixel and saved in the files specified by the avefile and rmsfile parameters, respectively.
  This 3-stage averaging algorithm eliminates large statistical fluctuations in the pixel amplitude spectrum.

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