Ah I see! Splinebox shouldn't give you discontinuities, but in that specific use case I'm not sure it would be the best. If you try let us know! And you may also want to check splineops.github.io/, released today as well (did I mention it was spline day?)

Everyday is spline day, and today even more! We are releasing #SplineBox, a Python package for spline fitting 🐍 Fantastic collab with the @EPFL_Imaging Center building on my @emblebi work. Check it out, feedback welcome (love letters or angry e-mails): splinebox.readthedocs.io

We’re thrilled to announce the release of #SplineBox, a new Python package for ultimate control over your spline fitting! 🎉 Developed by @VirginieUhlmann's group at @UZH_ch & the @EPFL_Imaging Center. It’s fast, customizable, and versatile: check it out! splinebox.readthedocs.io/