etos-mtcnn

train mtcnn from scratch.

MTCNN is widely used face detector for mobile devices. to train mtcnn model is a bit complex, enjoy it.

This work is used for reproduce MTCNN,a Joint Face Detection and Alignment using Multi-task Cascaded Convolutional Networks.

Prerequisites

1. You need CUDA-compatible GPUs to train the model.
2. You should first download WIDER Face,WIDER Face for face detection . The original paper needs Celeba for landmark detection,but some labels were wrong in Celeba. So this repo use this dataset for landmark detection).

Dependencies

• Tensorflow-GPU

Prepare For Training Data

1. Download Wider Face Training part only from Official Website , unzip to replace WIDER_train and put it into prepare_data folder.
2. Download landmark training data from here,unzip and put them into prepare_data folder.
3. Run prepare_data/gen_12net_data.py to generate training data(Face Detection Part) for PNet.
4. Run gen_landmark_aug_12.py to generate training data(Face Landmark Detection Part) for PNet.
5. Run gen_imglist_pnet.py to merge two parts of training data.
6. Run gen_PNet_tfrecords.py to generate tfrecord for PNet.
7. After training PNet, run gen_hard_example to generate training data(Face Detection Part) for RNet.
8. Run gen_landmark_aug_24.py to generate training data(Face Landmark Detection Part) for RNet.
9. Run gen_imglist_rnet.py to merge two parts of training data.
10. Run gen_RNet_tfrecords.py to generate tfrecords for RNet.(you should run this script four times to generate tfrecords of neg,pos,part and landmark respectively)
11. After training RNet, run gen_hard_example to generate training data(Face Detection Part) for ONet.
12. Run gen_landmark_aug_48.py to generate training data(Face Landmark Detection Part) for ONet.
13. Run gen_imglist_onet.py to merge two parts of training data.
14. Run gen_ONet_tfrecords.py to generate tfrecords for ONet.(you should run this script four times to generate tfrecords of neg,pos,part and landmark respectively)

Some Details

• When training PNet, merge four parts of data(pos,part,landmark,neg) into one tfrecord,since their total number radio is almost 1:1:1:3.But when training RNet and ONet, generate four tfrecords,since their total number is not balanced.During training, read 64 samples from pos,part and landmark tfrecord and read 192 samples from neg tfrecord to construct mini-batch.

• It's important for PNet and RNet to keep high recall radio.When using well-trained PNet to generate training data for RNet, can get 14w+ pos samples.When using well-trained RNet to generate training data for ONet, can get 19w+ pos samples.

• Since MTCNN is a Multi-task Network,we should pay attention to the format of training data.The format is:

  [path to image][cls_label][bbox_label][landmark_label]

  For pos sample,cls_label=1,bbox_label(calculate),landmark_label=[0,0,0,0,0,0,0,0,0,0].

  For part sample,cls_label=-1,bbox_label(calculate),landmark_label=[0,0,0,0,0,0,0,0,0,0].

  For landmark sample,cls_label=-2,bbox_label=[0,0,0,0],landmark_label(calculate).

  For neg sample,cls_label=0,bbox_label=[0,0,0,0],landmark_label=[0,0,0,0,0,0,0,0,0,0].

• Since the training data for landmark is less. use transform,random rotate and random flip to conduct data augment(the result of landmark detection is not that good).

Result

References

1. Kaipeng Zhang, Zhanpeng Zhang, Zhifeng Li, Yu Qiao , " Joint Face Detection and Alignment using Multi-task Cascaded Convolutional Networks," IEEE Signal Processing Letter
2. MTCNN-MXNET
3. MTCNN-CAFFE
4. deep-landmark
5. MTCNN-Tensorflow