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FsFont: Few-Shot Font Generation by Learning Fine-Grained Local Styles (CVPR2022)

image
This is the official paddlepaddle implementation for "FsFont: Few-Shot Font Generation by Learning Fine-Grained Local Styles" by Licheng Tang, Yiyang Cai, Jiaming Liu, Zhibin Hong, Mingming Gong, Minhu Fan, Junyu Han, Jingtuo Liu, Errui Ding and Jingdong Wang.
Paper Link: arxiv | Bibtex

Dependencies

PaddlePaddle == 2.3.2
torch >= 1.10.0 (for grid plot)
torchvision >= 0.11.0 (for grid plot)
sconf >= 0.2.3
lmdb >= 1.2.1

How to start

Data Preparation

1. Images & Characters

Draw all font images first including training fonts, validation fonts and your own content font. Organize directories structure as below

Font Directory
|  --| font1
|  --| font2
|     --| ch1.png
|     --| ch2.png
|     --| ...
|  --| ...

You also need to split all characters into train characters and val characters with unicode format and save them into json files, you can convert the utf8 format to unicode by using hex(ord(ch))[2:].upper():

train_unis: ["4E00", "4E01", ...]
val_unis: ['8E21', ...]

2. Content-Reference mapping

It is a dict you have to create by yourself before start, you can find the full CR-mapping algorithm in appendix and using the decompose dictionary of LFFont. Elements in dict also need to be converted into unicode format. Please assure keys of CR mapping contain both of train_unis and val_unis.

{content1: [ref1, ref2, ref3, ...], content2: [ref1, ref2, ref3, ...], ...}

example(in utf-8 format):

{连: [转, 还], 剧: [呢, 别, 卖], 愫: [累, 快, 请],  ...}

PS: You have to make sure the number of refereces of all contents be same for purpose of batch training.
e.g. 连: [转, 转, 还]

3. Run scripts

python3 ./build_dataset/build_meta4train.py 
--saving_dir ./results/your_task_name/ 
--content_font path\to\content 
--train_font_dir path\to\training_font 
--val_font_dir path\to\validation_font 
--seen_unis_file path\to\train_unis.json 
--unseen_unis_file path\to\val_unis.json

Training

You can modify the configuration in the file cfgs/custom.yaml

1. keys

  • work_dir: the root directory for saved results. (keep same with the saving_dir above)
  • data_path: path to data lmdb environment. (saving_dir/lmdb)
  • data_meta: path to train meta file. (saving_dir/meta)
  • content_font: the name of font you want to use as source font.
  • content_reference_json: the json file which stores content_referece mapping.
  • other values are hyperparameters for training.

2. Run scripts

python3 train.py 
    task_name
    cfgs/custom.yaml
    --resume \path\to\your\pretrain_model.pdparams

Test

1. Run scripts

python3 inference.py ./cfgs/custom.yaml 
--weight path\to\saved_weight.pdparams
--content_font path\to\content 
--img_path path\to\reference 
--saving_root path\to\saving_folder

Acknowledgements

Our code is modified based on the LFFont.

Bibtex

@InProceedings{Tang_2022_CVPR, 
    author    = {Tang, Licheng and Cai, Yiyang and Liu, Jiaming and Hong, Zhibin and Gong, Mingming and Fan, Minhu and Han, Junyu and Liu, Jingtuo and Ding, Errui and Wang, Jingdong}, 
    title     = {Few-Shot Font Generation by Learning Fine-Grained Local Styles}, 
    booktitle = {Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR)}, 
    month     = {June}, 
    year      = {2022}, 
    pages     = {7895-7904} 
}

Contact

For any questions, please file an issue or contact me lichengtang121@gmail.com