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Meelis Kull

5 accepted papers

2019

Beyond temperature scaling: Obtaining well-calibrated multi-class probabilities with Dirichlet calibration

NeurIPS 2019poster

Class probabilities predicted by most multiclass classifiers are uncalibrated, often tending towards over-confidence. With neural networks, calibration can be improved by temperature scaling, a method to learn a single corrective multiplicative factor for inputs to the last softmax layer. On non-neu…

2017

Beta calibration: a well-founded and easily implemented improvement on logistic calibration for binary classifiers

AISTATS 2017poster

For optimal decision making under variable class distributions and misclassification costs a classifier needs to produce well-calibrated estimates of the posterior probability. Isotonic calibration is a powerful non-parametric method that is however prone to overfitting on smaller datasets; hence a…

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