Abstract
Image captioning models are usually evaluated on their ability to describe a held-out set of images, not on their ability to generalize to unseen concepts. We study the problem of compositional generalization, which measures how well a model composes unseen combinations of concepts when describing images. State-of-the-art image captioning models show poor generalization performance on this task. We propose a multi-task model to address the poor performance, that combines caption generation and image--sentence ranking, and uses a decoding mechanism that re-ranks the captions according their similarity to the image. This model is substantially better at generalizing to unseen combinations of concepts compared to state-of-the-art captioning models.
Originalsprog | Udefineret/Ukendt |
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Titel | Proceedings of the 23rd Conference on Computational Natural Language Learning (CoNLL) |
Antal sider | 12 |
Udgivelsessted | Hong Kong, China |
Forlag | Association for Computational Linguistics (ACL) |
Publikationsdato | 1 nov. 2019 |
Sider | 87-98 |
DOI | |
Status | Udgivet - 1 nov. 2019 |