Yiyuan Zhang^1,2* Kaixiong Gong^1,2* Kaipeng Zhang^2,†
Hongsheng Li ^1,2 Yu Qiao ² Wanli Ouyang² Xiangyu Yue^1,†,‡

¹ Multimedia Lab, The Chinese University of Hong Kong
² OpenGVLab，Shanghai AI Laboratory
^* Equal Contribution ^† Corresponding Author ^‡ Project Lead

🌟 Single Foundation Model Supports A Wide Range of Applications

As a foundation model, Meta-Transformer can handle data from 12 modalities, which determines that it can support a wide range of applications. As shown in this figure, Meta-Transformer can provide services for downstream tasks including stock analysis 📈, weather forecasting ☀️ ☔ ☁️ ❄️ ⛄ ⚡, remote sensing 📡, autonomous driving 🚗, social network 🌍, speech recognition 🔉, etc.

Table 1: Meta-Transformer is capable of handling up to 12 modalities, including natural language , RGB images , point clouds , audios , videos , tabular data , graph , time series data , hyper-spectral images , IMU , medical images , and infrared images .

🚩🚩🚩 Shared-Encoder, Unpaired Data, More Modalities

This repository is built to explore the potential and extensibility of transformers for multimodal learning. We utilize the advantages of Transformers to deal with length-variant sequences. Then we propose the Data-to-Sequence tokenization following a meta-scheme, then we apply it to 12 modalities including text, image, point cloud, audio, video, infrared, hyper-spectral, X-Ray, tabular, graph, time-series, and Inertial Measurement Unit (IMU) data.

After obtaining the token sequence, we employ a modality-shared encoder to extract representation across different modalities. With task-specific heads, Meta-Transformer can handle various tasks on the different modalities, such as: classification, detection, and segmentation.

🌟 News

2023.8.17: Release code to directly get embeddings from multiple modalities. We will further release code on utilizing Meta-Transformer for Human-Centric vision tasks ⭐⭐⭐. (Implementations for Text, Audio, Video are comming soon 🌈🌈🌈.)
2023.8.2: 🎉🎉🎉 The implementation of Meta-Transformer for image, point cloud, graph, tabular, time-series, X-Ray, hyper-spectrum, LiDAR data has been released. We also release a very powerful foundation model for Autonomous Driving 🚀🚀🚀.
2023.7.22: 🌟🌟🌟 Pretrained weights and a usage demo for our Meta-Transformer have been released. Comprehensive documentation and implementation of the image modality are underway and will be released soon. Stay tuned for more exciting updates!⌛⌛⌛
2023.7.21: Paper is released at arxiv, and code will be gradually released.
2023.7.8: Github Repository Initialization.

🔓 Model Zoo

Open-source Modality-Agnostic Models

Model	Pretraining	Scale	#Param	Download	国内下载源
Meta-Transformer-B16	LAION-2B	Base	85M	ckpt	ckpt
Meta-Transformer-L14	LAION-2B	Large	302M	ckpt	ckpt

Demo of Use for Pretrained Encoder

from timm.models.vision_transformer import Block
ckpt = torch.load("Meta-Transformer_base_patch16_encoder.pth")
encoder = nn.Sequential(*[
            Block(
                dim=768,
                num_heads=12,
                mlp_ratio=4.,
                qkv_bias=True,
                norm_layer=nn.LayerNorm,
                act_layer=nn.GELU
            )
            for i in range(12)])
encoder.load_state_dict(ckpt,strict=True)

🕙 ToDo

Meta-Transformer with Large Language Models.
Multimodal Joint Training with Meta-Transformer.
Support More Modalities and More Tasks.

Contact

🚀🚀🚀 We aspire to shape this repository into a formidable foundation for mainstream AI perception tasks across diverse modalities. Your contributions can play a significant role in this endeavor, and we warmly welcome your participation in our project!

To contact us, never hestitate to send an email to yiyuanzhang.ai@gmail.com ,kaixionggong@gmail.com, zhangkaipeng@pjlab.org.cn, or xyyue@ie.cuhk.edu.hk!

Citation

If the code and paper help your research, please kindly cite:

@article{zhang2023metatransformer,
        title={Meta-Transformer: A Unified Framework for Multimodal Learning}, 
        author={Zhang, Yiyuan and Gong, Kaixiong and Zhang, Kaipeng and Li, Hongsheng and Qiao, Yu and Ouyang, Wanli and Yue, Xiangyu},
        year={2023},
        journal={arXiv preprint arXiv:2307.10802},
  }

License

This project is released under the Apache 2.0 license.

Acknowledgement

This code is developed based on excellent open-sourced projects including MMClassification, MMDetection, MMsegmentation, OpenPoints, Time-Series-Library, Graphomer, SpectralFormer, and ViT-Adapter.

Caczhtus/MetaTransformer