Sliding and Patch operators

[mrava87]

PyLops provides users with a suite of Sliding and Patch operators that divide a 1D, 2D or 3D into windows or patches and applies the same operator to all of them.

An extension of these operators to pylops-mpi would enable parallelism across the windows or patches. This is embarassingly parallel for the adjoint whilst requires writing a common output array for the forward.

These operators could be implemented following a similar procedure to the one developed for the derivatives operator, as some ghosts (aka overlap) between workers is required for the patches to be recombined in the forward pass.