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Enhancing CLIP with CLIP: Exploring Pseudolabeling for Limited-Label Prompt Tuning
March 11, 2024, 4:42 a.m. | Cristina Menghini, Andrew Delworth, Stephen H. Bach
cs.LG updates on arXiv.org arxiv.org
Abstract: Fine-tuning vision-language models (VLMs) like CLIP to downstream tasks is often necessary to optimize their performance. However, a major obstacle is the limited availability of labeled data. We study the use of pseudolabels, i.e., heuristic labels for unlabeled data, to enhance CLIP via prompt tuning. Conventional pseudolabeling trains a model on labeled data and then generates labels for unlabeled data. VLMs' zero-shot capabilities enable a "second generation" of pseudolabeling approaches that do not require task-specific …
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