Poisson Negative Log-Likelihood
Lower Poisson NLL values indicate better statistical agreement with measured diffraction patterns. Poisson NLL is appropriate for photon-counting data and does not require ground-truth object estimates. Poisson negative log-likelihood is t…
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Lower Poisson NLL values indicate better statistical agreement with measured diffraction patterns. Poisson NLL is appropriate for photon-counting data and does not require ground-truth object estimates. Poisson negative log-likelihood is the primary evaluation metric. Experimental ptychography generally lacks ground-truth object estimates, so the paper relies on Poisson NLL and comparison with standard reconstructions.