backward

anri.index.backward(r, cand, pred, ring_j, pos, scan, dims, vb)

Back-project a histogram onto each voxel’s candidates: A^T r.

Parameters:

• r (Array) – [n_cells] histogram (e.g. the ratio of data to prediction)

• cand (Array) – [Nv, K] orientation indices, Nv a multiple of vb

• pred (tuple) – See forward()

• ring_j (Array) – See forward()

• pos (Array) – See forward()

• scan (dict) – See forward()

• dims (tuple) – See forward()

• vb (int) – See forward()

Returns:

jax.Array – [Nv, K]