LLaVA-UHD

A Large Multimodal Model Perceiving Any Aspect Ratio and High-Resolution Images

This repository hosts the code, data, and model weight of LLaVA-UHD, a novel framework that enables Large Multimodal Models (LMMs) to efficiently perceive images in any aspect ratio and high resolution.

Notably, our model built on LLaVA-1.5 336×336 supports 6 times larger (i.e., 672×1088) resolution images using only 94% inference computation, and achieves 6.4 accuracy improvement on TextVQA. Moreover, the model can be efficiently trained in academic settings, within 23 hours on 8 A100 GPUs (vs. 26 hours of LLaVA-1.5). Visit our 📃 paper here!

Overview

LLaVA-UHD includes three key components to deal with native-resolution images:

• An image modularization strategy that divides native-resolution images into smaller variable-sized slices for efficient and extensible encoding.

• A compression module that further condenses image tokens from visual encoders.

• A spatial schema to organize slice tokens for LLMs. Comprehensive experiments show that LLaVA-UHD out- performs established LMMs trained with 2-3 orders of magnitude more data on 9 benchmarks.

Preparing

To reproduce the results of the paper, please set up the Python environment using the following code:

conda create -n llava-uhd python=3.10
conda activate llava-uhd
pip install -r requirements.txt

Pretraining Code

Please download the 558K subset of the LAION-CC-SBU dataset with BLIP captions we use in the paper here.

You should refer to the documentation of llava1.5, set up the environment according to llava1.5's way, and organize the training data properly, placing it in the path ./playground. Then run the following code for inference:

bash scripts/pretrain.sh

Fine-tuning Code

Please download the annotation of the final mixture our instruction tuning data llava_v1_5_mix665k.json, and download the images from constituting datasets:

• COCO: train2017
• GQA: images
• OCR-VQA: download script, we save all files as .jpg
• TextVQA: train_val_images
• VisualGenome: part1, part2

Download dataset images as in the finetuning process of llava1.5, place them in the playground, and then run the following code:

bash scripts/finetune.sh

Evaluation Code

When evaluating the model, we almost synchronously use the testing code of llava1.5, and the basic usage method is consistent. Please refer to here for help. We provide the same script to complete the testing.

Exploratory experiments

Exploratory experiments relevant to the paper and more reliable code are currently being further organized. Some of the code is not yet in its final version. Stay tuned!

Citation

If you find LLaVA-UHD useful for your research and applications, please cite using this BibTeX:

@article{xu2024llava-uhd,
  title={{LLaVA-UHD}: an LMM Perceiving Any Aspect Ratio and High-Resolution Images},
  author={Xu, Ruyi and Yao, Yuan and Guo, Zonghao and Cui, Junbo and Ni, Zanlin and Ge, Chunjiang and Chua, Tat-Seng and Liu, Zhiyuan and Huang, Gao},
  journal={arXiv preprint arXiv:2403.11703},
  year={2024}
}