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Preprocessing Workflow
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For each projection
* SUBTRACT_BACKGROUND
* CORRECT_FLATFIELD
a division
* ZEROCLIPVALUE and ONECLIPVALUE
* DOUBLEFFCORRECTION
* if logarithm is to be taken afterword : multiplication by the exponential of the doubleFF data
* otherwise subtraction of the doubleFF data from the projection
* DO_CCD_FILTER
* DO_PAGANIN
* Longitudinal axis correction if they are contained in AXIS_CORRECTION_FILE (second column)
* TAKE_LOGARITHM [TAKE_LOGARITHM]
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