etspy.align.calculate_shifts_com(stack: TomoStack, nslices: int) → ndarray[source]

Align stack using a center of mass method.

Data is first registered using PyStackReg. Then, the shifts perpendicular to the tilt axis are refined by a center of mass analysis.

Parameters:
stack: TomoStack

The image series to be aligned

nslices: int

Number of slices to return

Returns:

shifts – The X- and Y-shifts to be applied to each image

Return type:

ndarray