[CVPR2024] GPT4Point : A Unified Framework for Point-Language Understanding and Generation

🔥 News

🔥 2024/04/27: We have modified the point encoder section, and now evaluation is more functional, although the training section still needs modification.

🔥 2024/04/13: We release the GPT4Point v1.0, including training and 3D captioning evluation code.

🔥 2024/04/05: Our paper GPT4Point is selected as CVPR'24 Highlight 2.84% (324/11532) !

🔥 2024/02/27: Our paper GPT4Point is accepted by CVPR'24!

🔥 2024/01/19: We release the Objaverse-XL (Point Cloud Format) Download and Extraction way.

🔥 2023/12/05: The paper GPT4Point (arxiv) has been released, we unified the Point-language Understanding and Generation.

🔥 2023/08/13: Two-stage Pre-training code of PointBLIP has been released.

🔥 2023/08/13: Part of datasets used and result files has been uploaded.

🏠 Overview

This project presents GPT4Point , a 3D multi-modality model that aligns 3D point clouds with language. More details are shown in project page.

• Unified Framework for Point-language Understanding and Generation. We present the unified framework for point-language understanding and generation GPT4Point, including the 3D MLLM for point-text tasks and controlled 3D generation.

• Automated Point-language Dataset Annotation Engine Pyramid-XL. We introduce the automated point-language dataset annotation engine Pyramid-XL based on Objaverse-XL, currently encompassing 1M pairs of varying levels of coarseness and can be extended cost-effectively.

• Object-level Point Cloud Benchmark. Establishing a novel object-level point cloud benchmark with comprehensive evaluation metrics for 3D point cloud language tasks. This benchmark thoroughly assesses models' understanding capabilities and facilitates the evaluation of generated 3D objects.

🧭 Version

• v1.0 (2024/04/13). We release the training and evaluation (3D captioning) code.
  Dataset and text annotation: Cap3D.
  LLM Model: OPT 2.7b

🔧 Installation

1. (Optional) Creating conda environment

conda create -n gpt4point python=3.8
conda activate gpt4point

2. install from PyPI

   pip install salesforce-lavis

3. Or, for development, you may build from source

git clone https://github.com/salesforce/LAVIS.git
cd LAVIS
pip install -e .

📦 Data Preparation

1. Annotations: All annotations will be downloaded automaticly through hugging_face.

2. Point Cloud: You can download the Cap3D point cloud dataset through the Google Drive Link. You should unzip these 10 tar.gz files and then put them together. and the all folder strucure is:

GPT4Point
├── data
│   ├── cap3d
│   │   ├── points
│   │   │    ├── Cap3D_pcs_8192_xyz_w_color
│   │   │    │    ├── <point cloud id>.pkl
│   │   │    │    ├── ...
│   │   │    │    ├── <point cloud id>.pkl
│   │   ├── annotations
│   │   │    ├── cap3d_caption_train.json
│   │   │    ├── cap3d_caption_val.json
│   │   │    ├── cap3d_real_and_chatgpt_caption_test.json
│   │   │    ├── cap3d_real_and_chatgpt_caption_test_gt.json (for evaluation)

🚆 Training

1. For stage 1 training:

   python -m torch.distributed.run --master_port=32339 --nproc_per_node=4 train.py --cfg-path lavis/projects/gpt4point/train/pretrain_stage1_cap3d.yaml

2. For stage 2 training:

   python -m torch.distributed.run --master_port=32339 --nproc_per_node=4 train.py --cfg-path lavis/projects/gpt4point/train/pretrain_stage2_cap3d_opt2.7b.yaml

🏁 Evaluation

python -m torch.distributed.run --master_port=32239 --nproc_per_node=1 evaluate.py --cfg-path lavis/projects/gpt4point/eval/captioning3d_cap3d_opt2.7b_eval.yaml

📦 Point Dataset and Data Annotation Engine (Optional)

Objaverse-XL Point Dataset Download Way

Note that you should cd in the Objaverse-xl_Download directory.

cd ./Objaverse-xl_Download

Then please see the folder Objaverse-xl_Download for details.

Objaverse-XL Point Cloud Data Generation

Please see the Extract_Pointcloud for details.

📝 TODO List

Dataset and Data Engine

• [✔] Release the arxiv and the project page.
• [✔] Release the dataset (Objaverse-Xl) Download way.
• [✔] Release the dataset (Objaverse-Xl) rendering (points) way.
• [✔] Release pretrain training code and 3D captioning val code.
• [ ] Release dataset and data annotation engine (Pyramid-XL).
• [ ] Release more evaluation code.
• [ ] Release more trainingn code.
• [ ] Release more models.

🔗 Citation

If you find our work helpful, please cite:

@inproceedings{GPT4Point,
  title={GPT4Point: A Unified Framework for Point-Language Understanding and Generation},
  author={Zhangyang Qi and Ye Fang and Zeyi Sun and Xiaoyang Wu and Tong Wu and Jiaqi Wang and Dahua Lin and Hengshuang Zhao},
  booktitle={CVPR},
  year={2024},
}

📄 License

This work is under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

📚 Related Work

Together, Let's make LLM for 3D great!

• Point-Bind & Point-LLM: It aligns point clouds with Image-Bind to reason multi-modality input without 3D-instruction data training.
• 3D-LLM: employs 2D foundation models to encode multi-view images of 3D point clouds.
• PointLLM: employs 3D point clouds with LLaVA.