[Insight-users] ShiftScaleImageFilter Bug

[Andy Eow]

Hi,

According to the software guide, ShiftScaleImageFilter is suppose to perform the following operation:

OutputPixel = InputPixel * Scale + Shift

However, the code in itkShiftScaleImageFilter.txx does the opposite instead:

value = (static_cast<RealType>(it.Get()) + m_Shift) * m_Scale;

Is this a bug? It does make a lot more sense for the multiplication operation to take place first before the scalar shift. 

Cheers,
Andy
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