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DeepGMR: Learning Latent Gaussian Mixture Models for Registration

[paper] [data] [website]

Introduction

Deep Gaussian Mixture Registration (DeepGMR) is a learning-based probabilistic point cloud registration algorithm which achieves fast and accurate global regitration. This repository contains a basic PyTorch implementation of DeepGMR. Please refer to our project website or our publication at ECCV 2020 for more details.

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

@inproceedings{yuan2020deepgmr,
  title        = {DeepGMR: Learning Latent Gaussian Mixture Models for Registration},
  author       = {Yuan, Wentao and Eckart, Benjamin and Kim, Kihwan and Jampani, Varun and Fox, Dieter and Kautz, Jan},
  booktitle    = {European Conference on Computer Vision},
  pages        = {733--750},
  year         = {2020},
  organization = {Springer}
}

Usage

Prerequisite

1. Install dependencies by conda create -f environment.yml -n deepgmr.
2. Download data to data/.
3. Download pre-trained models to models/ (optional).

Inference

We provide four datasets for benchmarking registration results: modelnet_clean.h5, modelnet_noisy.h5, modelnet_unseen.h5 and icl_nuim.h5 (see Sec. 5 of our paper for more details). Each HDF5 file contains pairs of source and target point clouds with ground truth transformations. The transformations are fixed for ease of comparison.

Download the pre-trained models to reproduce the results of DeepGMR in the paper. For example, to see results on ModelNet noisy, run

python test.py --data data/test/modelnet_noisy.h5 \
--checkpoint models/modelnet_noisy.pth \
--use_rri \
--save_results \
--results_dir log/modelnet_noisy/test

and the predicted transformations will be saved at log/modelnet_noisy/test.

Training

Training DeepGMR is simple. For example, to train on ModelNet unseen:

python train.py --data data/train/modelnet20.h5 \
--log_dir log/modelnet_unseen/train \
--use_rri

Note that we use point clouds from only the first 20 classes of ModelNet40 (modelnet20.h5) instead of the full ModelNet40 (modelnet40.h5) to test the generalizability of our model to point clouds form unknown categories.

Ground truth transformations for the training/validation data are generated on the fly, whose magnitude can be controlled by --max_angle and --max_trans. The --clean flag controls whether independent Gaussian noise is added to the input points. Visualizations of the registration results will be available on Tensorboard during training.