Maintainer: salesforce

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Last updated 6/19/2024
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Model overview

BLIP (Bootstrapping Language-Image Pre-training) is a vision-language model developed by Salesforce that can be used for a variety of tasks, including image captioning, visual question answering, and image-text retrieval. The model is pre-trained on a large dataset of image-text pairs and can be fine-tuned for specific tasks. Compared to similar models like blip-vqa-base, blip-image-captioning-large, and blip-image-captioning-base, BLIP is a more general-purpose model that can be used for a wider range of vision-language tasks.

Model inputs and outputs

BLIP takes in an image and either a caption or a question as input, and generates an output response. The model can be used for both conditional and unconditional image captioning, as well as open-ended visual question answering.


  • Image: An image to be processed
  • Caption: A caption for the image (for image-text matching tasks)
  • Question: A question about the image (for visual question answering tasks)


  • Caption: A generated caption for the input image
  • Answer: An answer to the input question about the image


BLIP is capable of generating high-quality captions for images and answering questions about the visual content of images. The model has been shown to achieve state-of-the-art results on a range of vision-language tasks, including image-text retrieval, image captioning, and visual question answering.

What can I use it for?

You can use BLIP for a variety of applications that involve processing and understanding visual and textual information, such as:

  • Image captioning: Generate descriptive captions for images, which can be useful for accessibility, image search, and content moderation.
  • Visual question answering: Answer questions about the content of images, which can be useful for building interactive interfaces and automating customer support.
  • Image-text retrieval: Find relevant images based on textual queries, or find relevant text based on visual input, which can be useful for building image search engines and content recommendation systems.

Things to try

One interesting aspect of BLIP is its ability to perform zero-shot video-text retrieval, where the model can directly transfer its understanding of vision-language relationships to the video domain without any additional training. This suggests that the model has learned rich and generalizable representations of visual and textual information that can be applied to a variety of tasks and modalities.

Another interesting capability of BLIP is its use of a "bootstrap" approach to pre-training, where the model first generates synthetic captions for web-scraped image-text pairs and then filters out the noisy captions. This allows the model to effectively utilize large-scale web data, which is a common source of supervision for vision-language models, while mitigating the impact of noisy or irrelevant image-text pairs.

This summary was produced with help from an AI and may contain inaccuracies - check out the links to read the original source documents!

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