Resolving label uncertainty with implicit posterior modelsDownload PDF

Published: 20 May 2022, Last Modified: 03 Jul 2024UAI 2022 OralReaders: Everyone
Keywords: weakly supervised learning, discriminative models, image segmentation
TL;DR: Unified approach to learning with uncertain targets, applied to a variety of machine learning settings.
Abstract: We propose a method for jointly inferring labels across a collection of data samples, where each sample consists of an observation and a prior belief about the label. By implicitly assuming the existence of a generative model for which a differentiable predictor is the posterior, we derive a training objective that allows learning under weak beliefs. This formulation unifies various machine learning settings; the weak beliefs can come in the form of noisy or incomplete labels, likelihoods given by a different prediction mechanism on auxiliary input, or common-sense priors reflecting knowledge about the structure of the problem at hand. We demonstrate the proposed algorithms on diverse problems: classification with negative training examples, learning from rankings, weakly and self-supervised aerial imagery segmentation, co-segmentation of video frames, and coarsely supervised text classification.
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