The `PATCHSEL_CPU` function only works for 2D data, although a function for 3D seems to be [implemented](https://github.com/vais-ral/CCPi-Regularisation-Toolkit/blob/71f8d304d804b54d378f0ed05539f01aaaf13758/src/Core/regularisers_CPU/PatchSelect_core.c#L62-L107) in the C library. https://github.com/vais-ral/CCPi-Regularisation-Toolkit/blob/71f8d304d804b54d378f0ed05539f01aaaf13758/src/Python/src/cpu_regularisers.pyx#L608-L612
The
PATCHSEL_CPUfunction only works for 2D data, although a function for 3D seems to be implemented in the C library.https://github.com/vais-ral/CCPi-Regularisation-Toolkit/blob/71f8d304d804b54d378f0ed05539f01aaaf13758/src/Python/src/cpu_regularisers.pyx#L608-L612