How Do Inpainting Artifacts Propagate to Language?

Pratham Yashwante, Davit Abrahamyan, Shresth Grover, Sukruth Rao


Abstract
We study how visual artifacts introduced by diffusion-based inpainting affect language generation in vision-language models. We use a two-stage diagnostic setup in which masked image regions are reconstructed and then provided to captioning models, enabling controlled comparisons between captions generated from original and reconstructed inputs. Across multiple datasets, we analyze the relationship between reconstruction fidelity and downstream caption quality. We observe consistent associations between pixel-level and perceptual reconstruction metrics and both lexical and semantic captioning performance. Additional analysis of intermediate visual representations and attention patterns shows that inpainting artifacts lead to systematic, layer-dependent changes in model behavior. Together, these results provide a practical diagnostic framework for examining how visual reconstruction quality influences language generation in multimodal systems.
Anthology ID:
2026.acl-short.60
Volume:
Proceedings of the 64th Annual Meeting of the Association for Computational Linguistics (Volume 2: Short Papers)
Month:
July
Year:
2026
Address:
San Diego, California, United States
Editors:
Maria Liakata, Viviane P. Moreira, Jiajun Zhang, David Jurgens
Venue:
ACL
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
727–745
Language:
URL:
https://preview.aclanthology.org/ingest-acl/2026.acl-short.60/
DOI:
Bibkey:
Cite (ACL):
Pratham Yashwante, Davit Abrahamyan, Shresth Grover, and Sukruth Rao. 2026. How Do Inpainting Artifacts Propagate to Language?. In Proceedings of the 64th Annual Meeting of the Association for Computational Linguistics (Volume 2: Short Papers), pages 727–745, San Diego, California, United States. Association for Computational Linguistics.
Cite (Informal):
How Do Inpainting Artifacts Propagate to Language? (Yashwante et al., ACL 2026)
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https://preview.aclanthology.org/ingest-acl/2026.acl-short.60.pdf
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