Learning Customized Visual Models with Retrieval-Augmented Knowledge
On the map: Retrieval-augmented generation → Multimodal RAG
Abstract (arXiv)
Image-text contrastive learning models such as CLIP have demonstrated strong task transfer ability. The high generality and usability of these visual models is achieved via a web-scale data collection process to ensure broad concept coverage, followed by expensive pre-training to feed all the knowledge into model weights. Alternatively, we propose REACT, REtrieval-Augmented CusTomization, a framework to acquire the relevant web knowledge to build customized visual models for target domains. We retrieve the most relevant image-text pairs (~3% of CLIP pre-training data) from the web-scale database as external knowledge, and propose to customize the model by only training new modualized blocks while freezing all the original weights. The effectiveness of REACT is demonstrated via extensive experiments on classification, retrieval, detection and segmentation tasks, including zero, few, and full-shot settings. Particularly, on the zero-shot classification task, compared with CLIP, it achieves up to 5.4% improvement on ImageNet and 3.7% on the ELEVATER benchmark (20 datasets).
Key facts. Cited by 58 papers in the map (data through 7 Oct 2026). Placed in Multimodal RAG, one of 15 directions in Retrieval-augmented generation. Builds on 77 of its 96 references that are in the map. First posted on arXiv 17 Jan 2023.
Builds on
77 of 96 references.
Closest ancestors · 4
Same direction, newest first
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- 2022Retrieval Augmented Classification for Long-Tail Visual Recognition22 Feb
Other references · 73
- 2014Adam: A Method for Stochastic Optimizationcited by 36,960
- 2021Learning Transferable Visual Models From Natural Language Supervisioncited by 33,456
- 2020An Image is Worth 16x16 Words: Transformers for Image Recognition at Scalecited by 29,915
- 2014Microsoft COCO: Common Objects in Contextcited by 17,498
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- 2021Emerging Properties in Self-Supervised Vision Transformerscited by 6,893
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- 2021Scaling Up Visual and Vision-Language Representation Learning With Noisy Text Supervisioncited by 3,848
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- 2019Natural Adversarial Examplescited by 1,401
- 2020Big Self-Supervised Models are Strong Semi-Supervised Learnerscited by 1,375
- 2015Flickr30k Entities: Collecting Region-to-Phrase Correspondences for Richer Image-to-Sentence Modelscited by 1,352
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