Label Prediction Framework For Semi-Supervised Cross-Modal Retrieval

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Abstract
Cross-modal data matching refers to retrieval of data from one modality, when given a query from another modality. In general, supervised algorithms achieve better retrieval performance compared to their unsupervised counterpart, as they can learn better representative features by leveraging the available label information. However, this comes at the cost of requiring huge amount of labeled examples, which may not always be available. In this work, we propose a novel framework in a semi-supervised cross-modal retrieval setting, which can predict the labels of the unlabeled data using complementary information from different modalities. The proposed framework can be used as an add-on with any baseline cross-modal algorithm to give significant performance improvement, even in case of limited labeled data. Extensive evaluation using several baseline algorithms across three different datasets show the effectiveness of our label prediction framework.

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