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Multi-Object Matching

This repository contains code for the following methods of multi-object matching:

  1. The proposed method: Multi-Image Semantic Matching by Mining Consistent Features, CVPR 2018 by Qianqian Wang, Xiaowei Zhou and Kostas Daniilidis.
  2. Spectral method: "Solving the multi-way matching problem by permutation synchronization", NIPS 2013.
  3. MatchLift: "Near-optimal joint object matching via convex relaxation", ICML 2014.
  4. MatchALS: "Multi-Image Matching via Fast Alternating Minimization", CVPR 2015.

Tutorial slides

To learn more about multi-object matching, please refer to multiway-slides

Usage

  1. Download WILLOW-ObjectClass Dataset at dataset/
cd dataset/
wget http://www.di.ens.fr/willow/research/graphlearning/WILLOW-ObjectClass_dataset.zip
unzip WILLOW-ObjectClass_dataset.zip
# remove problematic image and annotation
rm -f WILLOW-ObjectClass/Face/image_0160.*
# there is an annotation error in Cars_030a.mat (coordinate swap between 6th and 7th keypoint), replace it with the correct one
mv Cars_030a.mat WILLOW-ObjectClass/Car/
  1. Download Alexnet Weights at hypercols/, and then extract feature descriptor hypercolumn from AlexNet.
cd ../hypercols/
wget http://www.cs.toronto.edu/~guerzhoy/tf_alexnet/bvlc_alexnet.npy
python run_willow.py
  1. run testWillow.m to test the code on WILLOW-ObjectClass dataset.

Citation

If you find this code useful for your research, please cite the following paper:

@inproceedings{zhou2015multi,
  title={Multi-image matching via fast alternating minimization},
  author={Zhou, Xiaowei and Zhu, Menglong and Daniilidis, Kostas},
  booktitle={ICCV},
  year={2015}
}
@inproceedings{wang2018multi,
  title={Multi-Image Semantic Matching by Mining Consistent Features},
  author={Wang, Qianqian and Zhou, Xiaowei and Daniilidis, Kostas},
  booktitle={CVPR},
  year={2018}
}

If you have any questions, please contact qw246@cornell.edu

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