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Description
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Subtract the dark current from a HFIR SANS data set.
This algorithm is rarely called directly. It is called by
:ref:`HFIRSANSReduction <algm-HFIRSANSReduction>`.


This workflow algorithm will:

- Properly load the dark current data set

- Normalize the dark current to the data taking period

- Subtract the dark current from the input workspace


The dark current is subtracted pixel by pixel by normalizing the dark current data by counting time, as follows:

:math:`I'(x,y)=I_{data}(x,y)-\frac{T_{data}}{T_{dc}} I_{dc}(x,y)`

where the T-values are the counting times for the data set and the dark current (dc).


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