Lotus: Diffusion-based Visual Foundation Model for High-quality Dense Prediction

Jing He^1✱, Haodong Li^1✱, Wei Yin², Yixun Liang¹, Kaiqiang Zhou³, Hongbo Zhang³, Bingbing Liu³,
Ying-Cong Chen^1,4✉

¹HKUST(GZ) ²University of Adelaide ³Noah's Ark Lab ⁴HKUST
^✱Both authors contributed equally. ^✉Corresponding author.

We present Lotus, a diffusion-based visual foundation model for dense geometry prediction. With minimal training data, Lotus achieves SoTA performance in two key geometry perception tasks, i.e., zero-shot depth and normal estimation. "Avg. Rank" indicates the average ranking across all metrics, where lower values are better. Bar length represents the amount of training data used.

📢 News

• 2024-11-13: The demo now supports video depth estimation!
• 2024-11-13: The Lotus disparity models (Generative & Discriminative) are now available, which achieve better performance!
• 2024-10-06: The demos are now available (Depth & Normal). Please have a try!
  
• 2024-10-05: The inference code is now available!
  
• 2024-09-26: Paper released. Click here if you are curious about the 3D point clouds of the teaser's depth maps!
  

🛠️ Setup

This installation was tested on: Ubuntu 20.04 LTS, Python 3.10, CUDA 12.3, NVIDIA A800-SXM4-80GB.

1. Clone the repository (requires git):

git clone https://github.com/EnVision-Research/Lotus.git
cd Lotus

2. Install dependencies (requires conda):

conda create -n lotus python=3.10 -y
conda activate lotus
pip install -r requirements.txt 

🤗 Gradio Demo

1. Online demo: Depth & Normal
2. Local demo

• For depth estimation, run:

  python app.py depth
  

• For normal estimation, run:

  python app.py normal
  

🕹️ Usage

Testing on your images

1. Place your images in a directory, for example, under assets/in-the-wild_example (where we have prepared several examples).
2. Run the inference command: bash infer.sh.

Evaluation on benchmark datasets

1. Prepare benchmark datasets:

• For depth estimation, you can download the evaluation datasets (depth) by the following commands (referred to Marigold)：

  cd datasets/eval/depth/
  
  wget -r -np -nH --cut-dirs=4 -R "index.html*" -P . https://share.phys.ethz.ch/~pf/bingkedata/marigold/evaluation_dataset/
  

• For normal estimation, you can download the evaluation datasets (normal) (dsine_eval.zip) into the path datasets/eval/normal/ and unzip it (referred to DSINE).

2. Run the evaluation command: bash eval.sh

Choose your model

Below are the released models and their corresponding configurations:

CHECKPOINT_DIR	TASK_NAME	MODE
jingheya/lotus-depth-g-v1-0	depth	generation
jingheya/lotus-depth-d-v1-0	depth	regression
jingheya/lotus-depth-g-v2-0-disparity	depth (disparity)	generation
jingheya/lotus-depth-d-v2-0-disparity	depth (disparity)	regression
jingheya/lotus-normal-g-v1-0	normal	generation
jingheya/lotus-normal-d-v1-0	normal	regression

🎓 Citation

If you find our work useful in your research, please consider citing our paper:

@article{he2024lotus,
    title={Lotus: Diffusion-based Visual Foundation Model for High-quality Dense Prediction},
    author={He, Jing and Li, Haodong and Yin, Wei and Liang, Yixun and Li, Leheng and Zhou, Kaiqiang and Liu, Hongbo and Liu, Bingbing and Chen, Ying-Cong},
    journal={arXiv preprint arXiv:2409.18124},
    year={2024}
}