Implementation of "Consensus-Driven Propagation in Massive Unlabeled Data for Face Recognition" (CDP)

Paper

Xiaohang Zhan, Ziwei Liu, Junjie Yan, Dahua Lin, Chen Change Loy, "Consensus-Driven Propagation in Massive Unlabeled Data for Face Recognition", ECCV 2018

Project Page: link

Dependency

Please use python3, as we cannot guarantee its compatibility with python2.
The version of PyTorch we use is 0.3.1.
Other depencencies:
```
pip install nmslib
```

Usage

Clone the repo.

git clone git@github.com:XiaohangZhan/cdp.git
cd cdp

Using ready-made data

Download the data here to the repo root, and uncompress it.
```
tar -xf data.tar.gz
```

Make sure the structure looks like the following:

cdp/data/
cdp/data/labeled/emore_l200k/
cdp/data/unlabeled/emore_u200k/
# ... other directories and files ...

Run CDP

Single model case:

python -u main.py --config experiments/emore_u200k_single/config.yaml

Multi-model voting case (committee size: 4):

python -u main.py --config experiments/emore_u200k_cmt4/config.yaml

Multi-model mediator case (committee size: 4):

# edit `experiments/emore_u200k_cmt4/config.yaml` as following:
# strategy: mediator
python -u main.py --config experiments/emore_u200k_cmt4/config.yaml

Collect the results

Take Multi-model mediator case for example, the results are stored in experiments/emore_u200k_cmt4/output/k15_mediator_111_th0.9915/sz600_step0.05/meta.txt. The order is the same as that in data/unlabeled/emore_u200k/list.txt. The samples labeled as -1 are discarded by CDP. You may assign them with new unique labels if you must use them.

Using your own data

Create your data directory, e.g. mydata
```
mkdir data/unlabeled/mydata
```
Prepare your data list as list.txt and copy it to the directory.
(optional) If you want to evaluate the performance on your data, prepare the meta file as meta.txt and copy it to the directory.
Prepare your feature files. Extract face features corresponding to the list.txt with your trained face models, and save it as binary files via feature.tofile("xxx.bin") in numpy. The features should satisfy Cosine Similarity condition. Finally link/copy them to data/unlabeled/mydata/features/. We recommand renaming the feature files using model names, e.g., resnet18.bin. CDP works for single model case, but we recommend you to use multiple models (i.e., preparing multiple feature files extracted from different models) with mediator for better results.

The structure should look like:

cdp/data/unlabeled/mydata/
cdp/data/unlabeled/mydata/list.txt
cdp/data/unlabeled/mydata/meta.txt (optional)
cdp/data/unlabeled/mydata/features/
cdp/data/unlabeled/mydata/features/*.bin

(You do not need to prepare knn files.)

Prepare the config file. Please refer to the examples in experiments/

mkdir experiments/myexp
cp experiments/emore_u200k_cmt4/config.yaml experiments/myexp/
# edit experiments/myexp/config.yaml to fit your case.
# you may need to change `base`, `committee`, `data_name`, etc.

Tips for paramters adjusting
- Modify threshold to obtain roughly closed precision and recall to achieve higher fscore.
- Higher threshold results in higher precision and lower recall.
- Larger max_sz results in lower precision and higher recall.

Run Baselines

We also implement several baseline clustering methods including: KMeans, MiniBatch-KMeans, Spectral, Hierarchical Agglomerative Clustering (HAC), FastHAC, DBSCAN, HDBSCAN, KNN DBSCAN, Approximate Rank-Order.
```
sh run_baselines.sh # results stored in `baseline_output/`
```

Evaluation Results

Data
- emore_u200k (images: 200K, identities: 2,577)
- emore_u600k (images: 600K, identities: 8,436)
- emore_u1.4m (images: 1.4M, identities: 21,433)
(These datasets are not the one in the paper which cannot be released, but the relative results are similar.)

Baselines

emore_u200k

method	#clusters	prec, recall, fscore	total time
* kmeans (ncluster=2577)	2577	94.24, 74.89, 83.45	618.1s
* MiniBatchKMeans (ncluster=2577)	2577	89.98, 87.86, 88.91	122.8s
* Spectral (ncluster=2577)	2577	97.42, 97.05, 97.24	12.1h
* HAC (ncluster=2577, knn=30)	2577	97.74, 88.02, 92.62	5.65h
FastHAC (distance=0.7, method=single)	46767	99.79, 53.18, 69.38	1.66h
DBSCAN (eps=0.75, nim_samples=10)	52813	99.52, 65.52, 79.02	6.87h
HDBSCAN (min_samples=10)	31354	99.35, 75.99, 86.11	4.87h
KNN DBSCAN (knn=80, min_samples=10)	39266	97.54, 74.42, 84.43	60.5s
ApproxRankOrder (knn=20, th=10)	85150	52.96, 16.93, 25.66	86.4s

emore_u600k

method	#clusters	prec, recall, fscore	total time
* kmeans (ncluster=8436)	8436	fail (out of memory)	-
* MiniBatchKMeans (ncluster=8436)	8436	81.64, 86.58, 84.04	2265.6s
* Spectral (ncluster=8436)	8436	fail (out of memory)	-
* HAC (ncluster=8436, knn=30)	8436	95.39, 86.28, 90.60	60.9h
FastHAC (distance=0.7, method=single)	94949	98.75, 68.49, 80.88	16.3h
DBSCAN (eps=0.75, nim_samples=10)	174886	99.02, 61.95, 76.22	79.6h
HDBSCAN (min_samples=10)	124279	99.01, 69.31, 81.54	47.9h
KNN DBSCAN (knn=80, min_samples=10)	133061	96.60, 70.97, 81.82	644.5s
ApproxRankOrder (knn=30, th=10)	304022	65.56, 8.139, 14.48	626.9s

Note: Methods marked * are reported with their theoretical upper bound results, since they need number of clusters as input. We use the values from the ground truth to obtain the results. For each method, we adjust the parameters to achieve the best performance.

CDP

emore_u200k

strategy	#model	setting	prec, recall, fscore	knn time	cluster time	total time
vote	1	k15_accept0_th0.66	89.35, 88.98, 89.16	14.8s	7.7s	22.5s
vote	5	k15_accept4_th0.605	93.36, 92.91, 93.13	78.7s	6.0s	84.7s
mediator	5	k15_110_th0.9938	94.06, 92.45, 93.25	78.7s	77.7s	156.4s
mediator	5	k15_111_th0.9925	96.66, 94.93, 95.79	78.7s	100.2s	178.9s

emore_u600k

strategy	#model	setting	prec, recall, fscore	knn time	cluster time	total time
vote	1	k15_accept0_th0.665	88.19, 85.33, 86.74	60.8s	24s	84.8s
vote	5	k15_accept4_th0.605	90.21, 89.9, 90.05	309.4s	18.3s	327.7s
mediator	5	k15_110_th0.985	90.43, 89.13, 89.78	309.4s	184.2s	493.6s
mediator	5	k15_111_th0.982	96.55, 91.98, 94.21	309.4s	246.3s	555.7s

emore_u1.4m

strategy	#model	setting	prec, recall, fscore	knn time	cluster time	total time
vote	1	k15_accept0_th0.68	89.49, 81.25, 85.17	187.5s	47.7s	235.2s
vote	5	k15_accept4_th0.62	90.63, 87.32, 88.95	967.0s	44.3s	1011.3s
mediator	5	k15_110_th0.99	93.67, 84.43, 88.81	967.0s	406.9s	1373.9s
mediator	5	k15_111_th0.982	95.29, 90.97, 93.08	967.0s	584.7s	1551.7s

Note:

For mediator, 110 means using relationship and affinity; 111 means using relationship, affinity and structure.

Bibtex

@inproceedings{zhan2018consensus,
  title={Consensus-Driven Propagation in Massive Unlabeled Data for Face Recognition},
  author={Zhan, Xiaohang and Liu, Ziwei and Yan, Junjie and Lin, Dahua and Change Loy, Chen},
  booktitle={Proceedings of the European Conference on Computer Vision (ECCV)},
  pages={568--583},
  year={2018}
}

jiashaoyong/cdp