MLLM-I2W: Harnessing Multimodal Large Language Model for Zero-Shot Composed Image Retrieval

Tong Bao, Che Liu, Derong Xu, Zhi Zheng, Tong Xu


Abstract
Combined Image Retrieval (CIR) involves retrieving an image based on a reference image and a brief text description, which is widely present in various scenarios such as fashion recommendation. Existing methods can be mainly divided into two categories, respectively supervised CIR methods and Zero-Shot CIR (ZS-CIR) methods. In contrast to supervised CIR methods, which need manually annotated triples for training task-specific models, ZS-CIR models can be trained using images datasets only and performs well. However, ZS-CIR still faces the primary challenge of learning how to map pseudo-words to images within the joint image-text embedding space. Therefore, in this paper, we propose a novel image-text mapping network, named MLLM-I2W, which adaptively converts description-related image information into pseudo-word markers for precise ZS-CIR. Specifically, the image and text encoding enhancement module within the MLLM prompt selects subject headings and generates text descriptions. It then reduces the modality gap between images and text using uncertainty modeling. An adaptive weighting module and a prototype are proposed to adjust and learn the deep fusion features, which are further mapped to pseudo-word markers via well-designed MOE-based mapping network. Our model demonstrates consistent improvements across common CIR benchmarks, including COCO, CIRR, and Fashion-IQ.
Anthology ID:
2025.coling-main.125
Volume:
Proceedings of the 31st International Conference on Computational Linguistics
Month:
January
Year:
2025
Address:
Abu Dhabi, UAE
Editors:
Owen Rambow, Leo Wanner, Marianna Apidianaki, Hend Al-Khalifa, Barbara Di Eugenio, Steven Schockaert
Venue:
COLING
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
1839–1849
Language:
URL:
https://aclanthology.org/2025.coling-main.125/
DOI:
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Cite (ACL):
Tong Bao, Che Liu, Derong Xu, Zhi Zheng, and Tong Xu. 2025. MLLM-I2W: Harnessing Multimodal Large Language Model for Zero-Shot Composed Image Retrieval. In Proceedings of the 31st International Conference on Computational Linguistics, pages 1839–1849, Abu Dhabi, UAE. Association for Computational Linguistics.
Cite (Informal):
MLLM-I2W: Harnessing Multimodal Large Language Model for Zero-Shot Composed Image Retrieval (Bao et al., COLING 2025)
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PDF:
https://aclanthology.org/2025.coling-main.125.pdf