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• per-event evaluates 2-d polar histogram of intensities and subtract it from imaging n-d array. Polarization correction and bin interpolation for imaging n-d array are also included.
• Docs: Radial Background Subtraction Algorithm, self-doc, method polarization_factor, example

Median filter

• input imaging n-d array is treated per event as a set of 2-d frames for two lowest indexes. For each pixel of the 2-d frame median intensity is evaluated using a group of nearest pixels located in the circular region defined by the radial parameter rank (r≤rank). If input array has a number of dimensions exceeding 2 the numpy.shape of output array is reduced to 3-d.
• Docs: self-doc, method median_filter_ndarr

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• Radial background: Radial Background Subtraction Algorithm, self-doc, method polarization_factor, example

• Median filter: self-doc, method median_filter_ndarr

• Fixed-shape background: self-doc, method subtract_bkgd, example

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