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• W3204383925 abstract "Contrastive learning allows us to flexibly define powerful losses by contrasting positive pairs from sets of negative samples. Recently, the principle has also been used to learn cross-modal embeddings for video and text, yet without exploiting its full potential. In particular, previous losses do not take the intra-modality similarities into account, which leads to inefficient embeddings, as the same content is mapped to multiple points in the embedding space. With CrossCLR, we present a contrastive loss that fixes this issue. Moreover, we define sets of highly related samples in terms of their input embeddings and exclude them from the negative samples to avoid issues with false negatives. We show that these principles consistently improve the quality of the learned embeddings. The joint embeddings learned with CrossCLR extend the state of the art in video-text retrieval on Youcook2 and LSMDC datasets and in video captioning on Youcook2 dataset by a large margin. We also demonstrate the generality of the concept by learning improved joint embeddings for other pairs of modalities." @default.
• W3204383925 created "2021-10-11" @default.
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• W3204383925 date "2021-09-30" @default.
• W3204383925 modified "2023-09-27" @default.
• W3204383925 title "CrossCLR: Cross-modal Contrastive Learning For Multi-modal Video Representations" @default.
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• W3204383925 hasPublicationYear "2021" @default.
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