Figure 8
Filter optimization using a reference reconstruction. (Top row) Filters optimized to a strip kernel reconstruction (left). Reconstructions before and after filter optimization using the ASTRA line kernel and Gridrec. The right half of each image shows absolute difference with the reference reconstruction. RMSE values with respect to the reference are also shown. (Bottom row) Reconstructions of a different (test) slice using the filters obtained for the slice in the top row. Pixelwise absolute difference and RMSE using implementation-adapted filters are smaller in both cases. |