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Poster

Lost in Translation: Latent Concept Misalignment in Text-to-Image Diffusion Models

Juntu Zhao · Junyu Deng · Yixin Ye · Chongxuan Li · Zhijie Deng · Dequan Wang

# 180
Strong blind review: This paper was not made available on public preprint services during the review process Strong Double Blind
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Wed 2 Oct 1:30 a.m. PDT — 3:30 a.m. PDT

Abstract:

Advancements in text-to-image diffusion models have broadened extensive downstream practical applications, but such models often encounter misalignment issues between text and image. Taking the generation of a combination of two disentangled concepts as an example, say given the prompt “a tea cup of iced coke”, existing models usually generate a glass cup of iced coke because the iced coke usually co-occurs with the glass cup instead of the tea one during model training. The root of such misalignment is attributed to the confusion in the latent semantic space of text-to-image diffusion models, and hence we refer to the “a tea cup of iced coke” phenomenon as Latent Concept Misalignment (LC-Mis). We leverage large language models (LLMs) to thoroughly investigate the scope of LC-Mis, and develop an automated pipeline for aligning the latent semantics of diffusion models to text prompts. Empirical assessments confirm the effectiveness of our approach, substantially reducing LC-Mis errors and enhancing the robustness and versatility of text-to-image diffusion models. Our code and dataset have been available online for reference.

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