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Principal Axes Matching

The Principal Axes method is an analytical matching method yielding the rigid transformation parameters in one calculation step. It interprets the image volumes as a mass distribution and aligns the principal axes of the two objects.

The presence of a background signal is crucial for the performance of the algorithm. Therefore several approaches for thresholding are offered in a selection.

Matching Dialog Principal Axes

Note that in practice principal axes matching rarely provides a satisfactory final match.