Towards reporting bias in visual-language datasets: bimodal augmentation by decoupling object-attribute association

• URL: http://arxiv.org/abs/2310.01330v1
• Date: Mon, 2 Oct 2023 16:48:50 GMT
• Title: Towards reporting bias in visual-language datasets: bimodal augmentation by decoupling object-attribute association
• Authors: Qiyu Wu, Mengjie Zhao, Yutong He, Lang Huang, Junya Ono, Hiromi Wakaki, Yuki Mitsufuji
• Abstract summary: We focus on the wide existence of reporting bias in visual-language datasets. We propose a bimodal augmentation (BiAug) approach to mitigate this bias. BiAug synthesizes visual-language examples with a rich array of object-attribute pairing and construct cross-modal hard negatives.
• Score: 23.06058982328083
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Reporting bias arises when people assume that some knowledge is universally understood and hence, do not necessitate explicit elaboration. In this paper, we focus on the wide existence of reporting bias in visual-language datasets, embodied as the object-attribute association, which can subsequentially degrade models trained on them. To mitigate this bias, we propose a bimodal augmentation (BiAug) approach through object-attribute decoupling to flexibly synthesize visual-language examples with a rich array of object-attribute pairing and construct cross-modal hard negatives. We employ large language models (LLMs) in conjunction with a grounding object detector to extract target objects. Subsequently, the LLM generates a detailed attribute description for each object and produces a corresponding hard negative counterpart. An inpainting model is then used to create images based on these detailed object descriptions. By doing so, the synthesized examples explicitly complement omitted objects and attributes to learn, and the hard negative pairs steer the model to distinguish object attributes. Our experiments demonstrated that BiAug is superior in object-attribute understanding. In addition, BiAug also improves the performance on zero-shot retrieval tasks on general benchmarks like MSCOCO and Flickr30K. BiAug refines the way of collecting text-image datasets. Mitigating the reporting bias helps models achieve a deeper understanding of visual-language phenomena, expanding beyond mere frequent patterns to encompass the richness and diversity of real-world scenarios.

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