Blind Face Restoration via Deep Multi-scale Component Dictionaries

Note: This branch contains all the restoration results, including 512×512 face region and the final result by putting the enhanced face to the origial input. The former version that can only generate the face result is put in master branch

Overview of our proposed method. It mainly contains two parts: (a) the off-line generation of multi-scale component dictionaries from large amounts of high-quality images, which have diverse poses and expressions. K-means is adopted to generate K clusters for each component (i.e., left/right eyes, nose and mouth) on different feature scales. (b) The restoration process and dictionary feature transfer (DFT) block that are utilized to provide the reference details in a progressive manner. Here, DFT-i block takes the Scale-i component dictionaries for reference in the same feature level.

(a) Offline generation of multi-scale component dictionaries.

(b) Architecture of our DFDNet for dictionary feature transfer.

Pre-train Models and dictionaries

Downloading from the following url and put them into ./.

• BaiduNetDisk (s9ht)
• GoogleDrive

The folder structure should be:

.
├── checkpoints                    
│   ├── facefh_dictionary                  
│   │   └── latest_net_G.pth   
├── weights
│   └── vgg19.pth
├── DictionaryCenter512
│   ├── right_eye_256_center.npy
│   ├── right_eye_128_center.npy
│   ├── right_eye_64_center.npy
│   ├── right_eye_32_center.npy
│   └── ...
└── ...

Prerequisites

• Pytorch (≥1.1 is recommended)
• dlib
• face-alignment

  cd ./FaceLandmarkDetection
  python setup.py install
  cd ..

Testing

python test_FaceDict.py

Four parameters in test_FaceDict.py can be changed for flexible usage:

• Line 149: opt.gpu_ids = [0] # gpu id. if use cpu, set opt.gpu_ids = []
• Line 150: TestImgPath = './TestData/TestWhole' # test image path
• Line 151: ResultsDir = './Results/TestWhole' # save path
• Line 152: UpScaleWhole = 4 # the upsample scale factor for the final result

Note: our DFDNet can only generate 512×512 face result for any given face image.

Result path contains the following folder:

• Step0_Input: # Save the input image.
• Step1_AffineParam: # Save the crop and align parameters for copying the face result to the original input.
• Step1_CropImg: # Save the cropped face images and resize them to 512×512.
• Step2_Landmarks: # Save the facial landmarks for RoIAlign.
• Step3_RestoreCropFace: # Save the face restoration result (512×512).
• Step4_FinalResults: # Save the final restoration result by putting the enhanced face to the original input.

Some plausible restoration results on real low-quality images

Input	Crop and Align	Restore Face	Final Results (UpScaleWhole=4)

TO DO LIST (if possible)

• Enhance all the faces in one image.
• Enhance the background.

Citation

@InProceedings{Li_2020_ECCV,
author = {Li, Xiaoming and Chen, Chaofeng and Zhou, Shangchen and Lin, Xianhui, Zuo, Wangmeng and Zhang, Lei},
title = {Blind Face Restoration via Deep Multi-scale Component Dictionaries},
booktitle = {ECCV},
year = {2020}
}

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.