This is the implementation of the paper "Neighbourhood Consensus Networks" by I. Rocco, M. Cimpoi, R. Arandjelović, A. Torii, T. Pajdla and J. Sivic.

For more information check out the project [website] and the paper on [arXiv].

The code is implemented using Python 3 and PyTorch 0.3. All dependencies should be included in the standard Anaconda distribution.

The PF-Pascal dataset can be downloaded and unzipped by browsing to the datasets/pf-pascal/ folder and running download.sh.

The IVD dataset (used for training for the InLoc benchmark) can be downloaded by browsing to the datasets/ivd/ folder and first running make_dirs.sh and then download.sh.

The InLoc dataset (used for evaluation) an be downloaded by browsing to the datasets/inloc/ folder and running download.sh.

The trained models trained on PF-Pascal (ncnet_pfpascal.pth.tar) and IVD (ncnet_ivd.pth.tar) can be dowloaded by browsing to the trained_models/ folder and running download.sh.

The demo Jupyter notebook file point_transfer_demo.py illustrates how to evaluate the model and use it for keypoint transfer on the PF-Pascal dataset. For this, previously download the PF-Pascal dataset and trained model as indicated above.

To train a model, run train.py with the desired model architecture and the path to the training dataset.

Eg. For PF-Pascal:

python train.py --ncons_kernel_sizes 5 5 5 --ncons_channels 16 16 1 --dataset_image_path datasets/pf-pascal --dataset_csv_path datasets/pf-pascal/image_pairs/ 

Eg. For InLoc:

python train.py --ncons_kernel_sizes 3 3 --ncons_channels 16 1 --dataset_image_path datasets/ivd --dataset_csv_path datasets/ivd/image_pairs/ 

Evaluation for PF-Pascal is implemented in the eval_pf_pascal.py file. You can run the evaluation in the following way:

python eval_pf_pascal.py --checkpoint trained_models/[checkpoint name]

Evaluation for InLoc is implemented in the eval_inloc.py file. You can run the evaluation in the following way:

python eval_inloc.py --checkpoint trained_models/[checkpoint name]

This will generate a series of matches files in the matches/ folder that then need to be fed to the InLoc evaluation Matlab code. In order to run the Matlab evaluation, you first need to clone the InLoc demo repo, and download and compile all the required depedencies. Then you can modify the compute_densePE_NCNet.m file provided in this repo to indicate the path of the InLoc demo repo, and the name of the experiment (the particular folder name inside matches/), and run it to perform the evaluation.

If you use this code in your project, please cite our paper:

@InProceedings{Rocco18b,
        author       = "Rocco, I. and Cimpoi, M. and Arandjelovi\'c, R. and Torii, A. and Pajdla, T. and Sivic, J."
        title        = "Neighbourhood Consensus Networks",
        booktitle    = "Proceedings of the 32nd Conference on Neural Information Processing Systems",
        year         = "2018",
        }