Cross-Modal Coordination Across a Diverse Set of Input Modalities

• URL: http://arxiv.org/abs/2401.16347v1
• Date: Mon, 29 Jan 2024 17:53:25 GMT
• Title: Cross-Modal Coordination Across a Diverse Set of Input Modalities
• Authors: Jorge S\'anchez and Rodrigo Laguna
• Abstract summary: Cross-modal retrieval is the task of retrieving samples of a given modality by using queries of a different one. This paper proposes two approaches to the problem: the first is based on an extension of the CLIP contrastive objective to an arbitrary number of input modalities. The second departs from the contrastive formulation and tackles the coordination problem by regressing the cross-modal similarities towards a target.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Cross-modal retrieval is the task of retrieving samples of a given modality by using queries of a different one. Due to the wide range of practical applications, the problem has been mainly focused on the vision and language case, e.g. text to image retrieval, where models like CLIP have proven effective in solving such tasks. The dominant approach to learning such coordinated representations consists of projecting them onto a common space where matching views stay close and those from non-matching pairs are pushed away from each other. Although this cross-modal coordination has been applied also to other pairwise combinations, extending it to an arbitrary number of diverse modalities is a problem that has not been fully explored in the literature. In this paper, we propose two different approaches to the problem. The first is based on an extension of the CLIP contrastive objective to an arbitrary number of input modalities, while the second departs from the contrastive formulation and tackles the coordination problem by regressing the cross-modal similarities towards a target that reflects two simple and intuitive constraints of the cross-modal retrieval task. We run experiments on two different datasets, over different combinations of input modalities and show that the approach is not only simple and effective but also allows for tackling the retrieval problem in novel ways. Besides capturing a more diverse set of pair-wise interactions, we show that we can use the learned representations to improve retrieval performance by combining the embeddings from two or more such modalities.

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