abstract etspy.align.StackAligner.calculate_shifts() → ndarray[source] Calculate the alignment shifts using the selected strategy. Returns:¶ shifts – An array of shape (n_images, 2) containing the calculated shifts. The first column shifts[:, 0] should contain Y-shifts (perpendicular to the tilt axis) and the second column shifts[:, 1] should contain X-shifts (parallel to the tilt axis). Return type:¶ ndarray