Fig. 12From: Block-iterative Richardson-Lucy methods for image deblurringBackprojected images \({\mathcal T}_{i}^{\ast }\textbf {I}_{\Lambda _{i}}\) of a 4 and b 8 diagonally-down-sampled Λ i . Here, \({\mathcal T}_{i}\) is the blurring transform associated with the diagonal PSF k D and Λ i Back to article page