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Figure 8
Effect of regularization. (a) shows how the residual norm ([|{\bf I}-{\rm A}{\bf x}|^{2}]) and solution norm ([|{\bf x}|^{2}]) after 500 iterations depend on the choice of the regularization parameter λ. (b) Percentage of non-zero coefficients as a function of regularization parameter. At [\lambda = 5\times 10^{3}] (dashed line) the number of non-zero coefficients has been reduced by about a factor of 4. Plots of the reconstructed density at (c) [\lambda = 0.0], (d) [\lambda = 5\times 10^{3}] and (e) [\lambda = 2\times 10^{4}]. White regions in these images correspond to voxels where all coefficients are zero.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 58| Part 2| April 2025| Pages 484-494
https://doi.org/10.1107/S1600576725001426
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