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Distill the Image to Nowhere: Inversion Knowledge Distillation for Multimodal Machine Translation

10 Oct 2022arXiv:2210.04468archive 2025-07-28

Ru Peng, Yawen Zeng, Junbo Zhao

Past works on multimodal machine translation (MMT) elevate bilingual setup by incorporating additional aligned vision information. However, an image-must requirement of the multimodal dataset largely hinders MMT's development -- namely that it demands an aligned form of [image, source text, target text]. This limitation is generally troublesome during the inference phase especially when the aligned image is not provided as in the normal NMT setup. Thus, in this work, we introduce IKD-MMT, a novel MMT framework to support the image-free inference phase via an inversion knowledge distillation scheme. In particular, a multimodal feature generator is executed with a knowledge distillation module, which directly generates the multimodal feature from (only) source texts as the input. While there have been a few prior works entertaining the possibility to support image-free inference for machine translation, their performances have yet to rival the image-must translation. In our experiments, we identify our method as the first image-free approach to comprehensively rival or even surpass (almost) all image-must frameworks, and achieved the state-of-the-art result on the often-used Multi30k benchmark. Our code and data are available at: https://github.com/pengr/IKD-mmt/tree/master..

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Tasks

Knowledge DistillationMachine TranslationMultimodal Machine TranslationNMTTranslation

Results from the paper archive 2025-07-28

TaskDatasetModelMetricValueRank at snapshotLeaderboardReport
Multimodal Machine Translation Multi30K IKD-MMT BLEU (EN-DE) 41.28 #2 of 15 Archive leaderboard report
Multimodal Machine Translation Multi30K IKD-MMT Meteor (EN-DE) 58.93 #2 of 15 Archive leaderboard report
Multimodal Machine Translation Multi30K IKD-MMT Meteor (EN-FR) 77.20 #2 of 15 Archive leaderboard report

Ranks are positions in the archive's leaderboards as they stood at the 2025-07-28 snapshot. Results published since then are not among these rows, so a rank here is not a current standing.

Methods

Knowledge Distillation

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