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arXiv · 2211.09929

Contrastive Credibility Propagation for Reliable Semi-Supervised Learning

Brody Kutt·Pralay Ramteke·Xavier Mignot·Pamela Toman·Nandini Ramanan·Sujit Rokka Chhetri·Shan Huang·Min Du·William Hewlett
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Abstract

Producing labels for unlabeled data is error-prone, making semi-supervised learning (SSL) troublesome. Often, little is known about when and why an algorithm fails to outperform a supervised baseline. Using benchmark datasets, we craft five common real-world SSL data scenarios: few-label, open-set, noisy-label, and class distribution imbalance/misalignment in the labeled and unlabeled sets. We propose a novel algorithm called Contrastive Credibility Propagation (CCP) for deep SSL via iterative transductive pseudo-label refinement. CCP unifies semi-supervised learning and noisy label learning for the goal of reliably outperforming a supervised baseline in any data scenario. Compared to prior methods which focus on a subset of scenarios, CCP uniquely outperforms the supervised baseline in all scenarios, supporting practitioners when the qualities of labeled or unlabeled data are unknown.

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Brody Kutt, Pralay Ramteke, Xavier Mignot, Pamela Toman, Nandini Ramanan, Sujit Rokka Chhetri, Shan Huang, Min Du, William Hewlett. 2022-11-17. Contrastive Credibility Propagation for Reliable Semi-Supervised Learning. https://arxiv.org/abs/2211.09929

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