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Learning Optimal Conformal Classifiers

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arxiv 2110.09192 v3 pith:OHZK3TEC submitted 2021-10-18 cs.LG cs.CVstat.MEstat.ML

Learning Optimal Conformal Classifiers

classification cs.LG cs.CVstat.MEstat.ML
keywords trainingconfidenceconformalsetsconftrclassesclassifiersduring
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Modern deep learning based classifiers show very high accuracy on test data but this does not provide sufficient guarantees for safe deployment, especially in high-stake AI applications such as medical diagnosis. Usually, predictions are obtained without a reliable uncertainty estimate or a formal guarantee. Conformal prediction (CP) addresses these issues by using the classifier's predictions, e.g., its probability estimates, to predict confidence sets containing the true class with a user-specified probability. However, using CP as a separate processing step after training prevents the underlying model from adapting to the prediction of confidence sets. Thus, this paper explores strategies to differentiate through CP during training with the goal of training model with the conformal wrapper end-to-end. In our approach, conformal training (ConfTr), we specifically "simulate" conformalization on mini-batches during training. Compared to standard training, ConfTr reduces the average confidence set size (inefficiency) of state-of-the-art CP methods applied after training. Moreover, it allows to "shape" the confidence sets predicted at test time, which is difficult for standard CP. On experiments with several datasets, we show ConfTr can influence how inefficiency is distributed across classes, or guide the composition of confidence sets in terms of the included classes, while retaining the guarantees offered by CP.

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Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Conformal Margin Risk Minimization: An Envelope Framework for Robust Learning under Label Noise

    cs.LG 2026-04 unverdicted novelty 7.0

    CMRM adds a conformal quantile regularization on prediction margins to any loss, improving noisy-label classification accuracy up to 3.39% across methods and benchmarks while preserving performance at zero noise.

  2. ST-BCP: Tightening Coverage Bound for Backward Conformal Prediction via Non-Conformity Score Transformation

    stat.ML 2026-02 conditional novelty 7.0

    ST-BCP tightens the coverage bound in Backward Conformal Prediction by applying a computable data-dependent transformation to nonconformity scores, reducing the average gap from 4.20% to 1.12% on benchmarks while prov...

  3. Uncertainty-Aware Intention Prediction for Human-to-Robot Assembly Teleoperation

    cs.RO 2026-06 unverdicted novelty 6.0

    Human-to-robot transfer learning with conformal prediction improves robot assembly action segmentation Edit score from 70.50 to 80.70 using only 16 robot demonstrations.

  4. RareCP: Regime-Aware Retrieval for Efficient Conformal Prediction

    cs.LG 2026-05 unverdicted novelty 6.0

    RareCP improves interval efficiency for time series conformal prediction by retrieving and weighting regime-specific calibration examples while adapting to drift and maintaining coverage.

  5. Robust Conditional Conformal Prediction via Branched Normalizing Flow

    cs.LG 2026-05 unverdicted novelty 6.0

    Branched Normalizing Flow improves conditional coverage robustness of conformal prediction under distribution shift by normalizing test inputs to the calibration distribution and mapping prediction sets back.

  6. Structure-Adaptive Conformal Inference for Large-Scale Out-of-Distribution Testing

    stat.ME 2026-05 unverdicted novelty 5.0

    Introduces SCQ and P-TAMS for structure-adaptive conformal inference under pairwise exchangeability, claiming finite-sample FDR control for large-scale OOD testing.