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where keywords do_peds and do_cmod should have value yes or true in order to turn on pedestal subtraction and common mode correction algorithms.

• Detector.PyDetector package which provides uniform access to calibration and data for all detectors.

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• par[4] - number of segments for common mode evaluation
• par[5] - segment size (number of pixels for common mode evaluation)

• par[6] - stride (step for jump to the next pixel)

  For example:

  Code Block
  1 50 50 100 8192 128 1

#2 - MEAN algorithm

It was developed by Philip Hart for test purpose;

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4 1 30 10    0 0 0 0    0 0 0 0    0 0 0 0    0 0 0 0

where

1. par[0] (4) - algorithm number; 4 stands for this median algorithm,
2. par[1] (1) - type of regions for median algorithm; 3 regions (banks/rows/columns) for Epix100a, and 2 regions (banks/rows) for Fccd960:
   

   1. EPIX100A has an option to turn on up to 3 regions for common mode correction, controlled by the bitword parameter #2: bit#1 - common mode for 352x96-pixel 16 banks,  bit#2 - common mode for 96-pixel rows in 16 banks,  bit#3 - common mode for 352-pixel columns in 16 banks

   2. FCCD960 has 2 regions, also selected by parameter #2:  bit#1 - common mode correction for 1x160-pixel rows with stride 2, bit#2 - common mode correction for 480x10-pixel 96*2 supercolumns

3. par[2] (30) - initial guess for range of histogram (relative to 0) in ADU (see above description of intensity histogram).  This number can grow in subsequent iterations if half of the statistics is not found in this range.  It should probably start at around 3 sigma of the noise value.
4. par[3] (10) - maximal allowed absolute value of the common mode correction in ADU. If = 0 - no-limit is applied directly, indirect limit = 10000ADU (from limit on intensity histogram described above).

Other parameters are not used.

#5 - Unbond pixels common mode correction for CSPAD and CSPAD2x2

In latest version of CSPAD (including 2x2) detectors a group of pixels is not bound to relevant electronic channels. Signal from these channels can be used to evaluate common mode variation of the sensor. Typical common_mode  control parameters:

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