Official PyTorch implementation of the paper:

Long-Range Grouping Transformer for Multi-View 3D Reconstruction

Authors: Liying Yang, Zhenwei Zhu, Xuxin Lin, Jian Nong, Yanyan Liang.

We share the pre-trained model of LRGT, which has been trained under 3-view input. Download link Extraction code: ynq7. Unlike the model in paper, we train the model using two NVIDIA 4090 GPUs. The performance is similar to the paper presented.

The code and pretrain models are coming soon.

• Release the pretrain models
• Release the code

The environment was tested on Ubuntu 16.04.5 LTS and Ubuntu 20.04.5 LTS. We trained LRGT on 2 Tesla V100s for about 1 day and LRGT+ on 8 Tesla V100s for about 2.5 days.

Clone the code repository

git clone https://github.com/LiyingCV/Long-Range-Grouping-Transformer.git

Create a new environment from environment.yml

conda env create -f environment.yml
conda activate lrgt

Or install Python dependencies

cd Long-Range-Grouping-Transformer
conda create -n lrgt python=3.6
pip install -r requirements.txt

We use the ShapeNet and Pix3D in our experiments, which are available below:

• ShapeNet rendering images: http://cvgl.stanford.edu/data2/ShapeNetRendering.tgz
• ShapeNet voxelized models: http://cvgl.stanford.edu/data2/ShapeNetVox32.tgz
• Pix3D images & voxelized models: http://pix3d.csail.mit.edu/data/pix3d.zip

We provide the training script, which you can run as following: sh train.sh.

We use torch.distributed for multiple GPU training; therefore, you can change CUDA_VISIBLE_DEVICES and nproc_per_node to use more devices or only one device.

We provide the testing script, which you can run as following: sh test.sh

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

@InProceedings{Yang_2023_ICCV,
    author    = {Yang, Liying and Zhu, Zhenwei and Lin, Xuxin and Nong, Jian and Liang, Yanyan},
    title     = {Long-Range Grouping Transformer for Multi-View 3D Reconstruction},
    booktitle = {Proceedings of the IEEE/CVF International Conference on Computer Vision (ICCV)},
    month     = {October},
    year      = {2023},
    pages     = {18257-18267}
}

Please check out other works on multi-view reconstruction from our group:

• GARNet: Global-Aware Multi-View 3D Reconstruction Network and the Cost-Performance Tradeoff (Pattern Recognition 2023)
• UMIFormer: Mining the Correlations between Similar Tokens for Multi-View 3D Reconstruction (ICCV 2023)