Fig. 2.

Images reconstructed from 60-view projection data with a Poisson distributed noise model. The top row of images result from minimizing the ${\ell }_2^2$-TV objective in Eq. (33) for λ = 1 × 10⁻⁴, 5 × 10⁻⁵, and 2 × 10⁻⁵, going from left to right. The bottom row of images result from minimizing the KL-TV objective in Eq. (46) for the same values of λ. Note that λ does not necessarily have the same impact on each of these optimization problems. Nevertheless, we see similar trends for the chosen values of λ.