CCPi-Regularisation-Toolkit
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Missing energy for the dTV regulariser
In the utils.c there are TV energies that computes the TV for 2D and 3D arrays. We need the same for the dTV function.
The computation of the gradient of the prior image is here for 2D, which is the ξ(x)
from eq. (22) in here.
I'm happy to have a look at implementing this.