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Table 4 Selections of the regularization parameters with different noise levels

From: Low-dose CT reconstruction via L1 dictionary learning regularization using iteratively reweighted least-squares

  Shepp–Logan Head slice
60 views 2 million photons 60 views 1 million photons 180 views 2 million photons 90 views 2 million photons
DL methods 4.841 × 103 8.141 × 103 1.451 × 103 1.725 × 103
GPBB 0.4 0.5 0.5 0.6
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