BLIP: Bootstrapping Language-Image Pre-training for Unified Vision-Language Understanding and Generation
It addresses the problem of noisy web data and task specialization in vision-language AI, offering a unified solution with strong performance gains.
The paper tackles the limitation of existing vision-language pre-trained models that excel in either understanding or generation tasks by proposing BLIP, a framework that unifies both and achieves state-of-the-art results, such as +2.7% in image-text retrieval and +2.8% in image captioning.
Vision-Language Pre-training (VLP) has advanced the performance for many vision-language tasks. However, most existing pre-trained models only excel in either understanding-based tasks or generation-based tasks. Furthermore, performance improvement has been largely achieved by scaling up the dataset with noisy image-text pairs collected from the web, which is a suboptimal source of supervision. In this paper, we propose BLIP, a new VLP framework which transfers flexibly to both vision-language understanding and generation tasks. BLIP effectively utilizes the noisy web data by bootstrapping the captions, where a captioner generates synthetic captions and a filter removes the noisy ones. We achieve state-of-the-art results on a wide range of vision-language tasks, such as image-text retrieval (+2.7% in average recall@1), image captioning (+2.8% in CIDEr), and VQA (+1.6% in VQA score). BLIP also demonstrates strong generalization ability when directly transferred to video-language tasks in a zero-shot manner. Code, models, and datasets are released at https://github.com/salesforce/BLIP.