obtaining subpixel shifts for rigid registration

[m-xie]

Hi! Thank you for creating and maintaining this package! I am currently running registration for a dataset that only requires rigid registration. In the documentation under rigid registration, it notes that:

After computing the shifts, the frames are shifted in the Fourier domain (allowing subpixel shifts of the images).

When I extract the rigid shifts from xoff and yoff, however, the shifts are only integer pixels. Does suite2p have the ability to perform subpixel-level rigid registration, and if so, how can I access that feature?

Many thanks!