transformers/docs/source/en/model_doc/instructblip.md

InstructBLIP

Overview

The InstructBLIP model was proposed in InstructBLIP: Towards General-purpose Vision-Language Models with Instruction Tuning by Wenliang Dai, Junnan Li, Dongxu Li, Anthony Meng Huat Tiong, Junqi Zhao, Weisheng Wang, Boyang Li, Pascale Fung, Steven Hoi. InstructBLIP leverages the BLIP-2 architecture for visual instruction tuning.

The abstract from the paper is the following:

General-purpose language models that can solve various language-domain tasks have emerged driven by the pre-training and instruction-tuning pipeline. However, building general-purpose vision-language models is challenging due to the increased task discrepancy introduced by the additional visual input. Although vision-language pre-training has been widely studied, vision-language instruction tuning remains relatively less explored. In this paper, we conduct a systematic and comprehensive study on vision-language instruction tuning based on the pre-trained BLIP-2 models. We gather a wide variety of 26 publicly available datasets, transform them into instruction tuning format and categorize them into two clusters for held-in instruction tuning and held-out zero-shot evaluation. Additionally, we introduce instruction-aware visual feature extraction, a crucial method that enables the model to extract informative features tailored to the given instruction. The resulting InstructBLIP models achieve state-of-the-art zero-shot performance across all 13 held-out datasets, substantially outperforming BLIP-2 and the larger Flamingo. Our models also lead to state-of-the-art performance when finetuned on individual downstream tasks (e.g., 90.7% accuracy on ScienceQA IMG). Furthermore, we qualitatively demonstrate the advantages of InstructBLIP over concurrent multimodal models.

InstructBLIP architecture. Taken from the original paper.

This model was contributed by nielsr. The original code can be found here.

Usage tips

InstructBLIP uses the same architecture as BLIP-2 with a tiny but important difference: it also feeds the text prompt (instruction) to the Q-Former.

Note

BLIP models after release v4.46 will raise warnings about adding processor.num_query_tokens = {{num_query_tokens}} and expand model embeddings layer to add special <image> token. It is strongly recommended to add the attributes to the processor if you own the model checkpoint, or open a PR if it is not owned by you. Adding these attributes means that BLIP will add the number of query tokens required per image and expand the text with as many <image> placeholders as there will be query tokens. Usually it is around 500 tokens per image, so make sure that the text is not truncated as otherwise there wil be failure when merging the embeddings. The attributes can be obtained from model config, as model.config.num_query_tokens and model embeddings expansion can be done by following this link.

InstructBlipConfig

autodoc InstructBlipConfig - from_vision_qformer_text_configs

InstructBlipVisionConfig

autodoc InstructBlipVisionConfig

InstructBlipQFormerConfig

autodoc InstructBlipQFormerConfig

InstructBlipProcessor

autodoc InstructBlipProcessor

InstructBlipVisionModel

autodoc InstructBlipVisionModel - forward

InstructBlipQFormerModel

autodoc InstructBlipQFormerModel - forward

InstructBlipModel

autodoc InstructBlipModel

InstructBlipForConditionalGeneration

autodoc InstructBlipForConditionalGeneration - forward - generate