Extreme multi-label classification (XMC) is the problem of finding the relevant labels for an input, from a very large universe of possible labels. We consider XMC in the setting where labels are available only for groups of samples - but not for individual ones. Current XMC approaches are not built for such multi-instance multi-label (MIML) training data, and MIML approaches do not scale to XMC sizes. We develop a new and scalable algorithm to impute individual-sample labels from the group labels; this can be paired with any existing XMC method to solve the aggregated label problem. We characterize the statistical properties of our algorithm under mild assumptions, and provide a new end-to-end framework for MIML as an extension. Experiments on both aggregated label XMC and MIML tasks show the advantages over existing approaches.
@article{arxiv.2004.00198,
title = {Extreme Multi-label Classification from Aggregated Labels},
author = {Yanyao Shen and Hsiang-fu Yu and Sujay Sanghavi and Inderjit Dhillon},
journal= {arXiv preprint arXiv:2004.00198},
year = {2020}
}