MUNEGC: 2D-3D Geometric Fusion Network using Multi-Neighbourhood Graph Convolution for RGB-D Indoor Scene Classification

See our project website here.

Code Structure

• ./dataset/ - Scripts to generate the dataset and the dataset itself.
• ./Fusion2D3DMUNEGC - Implementation of the network and the proposed operations.
• ./launcher - Scripts to train and test the proposed network.
• ./results - Stores the results obtained during training.
• ./pretrain/* - Pretrained weights for each branch.

Requirements

1. Install Pytorch 1.8.1 following the oficial documentation.
2. Install Pytorch-Geometric 1.7.0, torch-cluster 1.5.9, torch-scatter 2.0.6 and torch-sparse 0.6.9 following the oficial documentation.
3. Install the MUNEGC package running the following line pip install -e . at the root folder of the project.

This code has been tested in Ubuntu-18.04 using Python3.6, Cuda11.1 and the previous mentioned versions of Pytorch and Pytorch Geometric.

Datasets

You can download our pre-processed dataset here. If you want to create your own version of the dataset, you can download the official NYUV2 dataset here and the official SUNRGBD dataset here. We also provide the scripts to generate the data for each of the branches in dataset/datagen. These scripts expect to find the raw data in dataset/nyuv2 or dataset/sunrgbd. To generate the HHA features, we have used the implementation done by charlesCXK, included in this repository. You can find the original implementation here.

Test

To reproduce the paper's results you can download the pre-trained models here. You can find the scripts needed for run the tests for each of the branches in the folder launcher.

Training

As explained in the paper, the branches of the network are trained independently. To train the 2D Texture and 3D Geometric branches, you need to run the corresponding training script located in the launcher folder. To train the Fusion Stage, first we have to extract the features obtained by both branches.

1. In order to obtain the 2D texture features, first we have to run the scripts located in dataset/datagen/fusion2d3d. These scripts are going to generate the 3D points for each of the features obtained by the 2D Texture branch. To add the features to the obtained 3D points, you have to run the extract_features.sh script located in the launcher/texture2d folder.

2. In order to obtain the 3D Geometric features you have to run the extract_features.sh script located in the launcher/geometric3d folder.

NOTE: Please check graph_model.py in order to understand how you can define your own architecture using the provided operations.

Issues

Due to the existence of some non-deterministic operations in pytorch, as explained here, some results may not be reproducible or give slightly different values. This effect also appears when you use different model of GPUs to train and test the network.

Citation

@article{MOSELLAMONTORO2021,
title = {2D–3D Geometric Fusion network using Multi-Neighbourhood Graph Convolution for RGB-D indoor scene classification},
journal = {Information Fusion},
volume = {76},
pages = {46-54},
year = {2021},
issn = {1566-2535},
doi = {https://doi.org/10.1016/j.inffus.2021.05.002},
author = {Albert Mosella-Montoro and Javier Ruiz-Hidalgo},
}

Contact

For questions and suggestions send an e-mail to albert.mosella@upc.edu.