SPTS v2: Single-Point Scene Text Spotting

The official implementation of SPTS v2: Single-Point Text Spotting. The SPTSv2 which achieves 19× faster inference speed tackles scene text spotting as an end-to-end sequence prediction task and requires only extremely low-cost single-point annotations. Below is the overall architecture of SPTSv2.

Environment

We recommend using Anaconda to manage environments. Run the following commands to install dependencies.

conda create -n sptsv2 python=3.7 -y
conda activate sptsv2
conda install pytorch==1.8.1 torchvision==0.9.1 torchaudio==0.8.1 -c pytorch
git clone git@github.com:bytedance/SPTSv2.git
cd SPTSv2
pip install -r requirements.txt

Dataset

• CurvedSynText150k [paper]:

  • Part1 (94,723) Download (15.8G) (Origin, Google, BaiduNetDisk password: 4k3x)
  • Part2 (54,327) Download (9.7G) (Origin, Google, BaiduNetDisk password: a5f5)

• Totaltext [paper] [source].

  • Download (0.4G) (Google, BaiduNetDisk password: 5nhw)

• SCUT-CTW1500 [paper] [source].

  • Download (0.8G) (Google, BaiduNetDisk password: 82vs)

• MLT [paper].

  • Download (6.8G) (Origin, Google, BaiduNetDisk password: zqrm)

• ICDAR2013 [paper] [source].

  • Download (0.2G) (Google, BaiduNetDisk password: 5ddh)

• ICDAR2015 [paper] [source].

  • Download (0.1G) (Google, BaiduNetDisk password: wjrh)

• Inverse-Text (images): OneDrive, BaiduNetdisk(6a2n).

Please download and extract the above datasets into the data folder following the file structure below.

data
├─CTW1500
│  ├─annotations
│  │      test_ctw1500_maxlen25.json
│  │      train_ctw1500_maxlen25_v2.json
│  ├─ctwtest_text_image
│  └─ctwtrain_text_image
├─icdar2013
│  │  ic13_test.json
│  │  ic13_train.json
│  ├─test_images
│  └─train_images
├─icdar2015
│  │  ic15_test.json
│  │  ic15_train.json
│  ├─test_images
│  └─train_images
|- inversetext
|  |- test_images
|  └─ test_poly.json
├─mlt2017
│  │  train.json
│  └─MLT_train_images
├─syntext1
│  │  train.json
│  └─syntext_word_eng
├─syntext2
│  │  train.json
│  └─emcs_imgs
└─totaltext
    │  test.json
    │  train.json
    ├─test_images
    └─train_images

Train and finetune

The model training in the original paper uses 16 GPUs (2 nodes, 8 A100 GPUs per node). Below are the instructions for the training using a single machine with 8 GPUs, which can be simply modified to multi-node training following PyTorch Distributed Docs.

You can download our pretrained weight from Google Drive or BaiduNetDisk, password: 3pcu, or pretrain the model from scratch using the run.sh file. If finetuning, just set --resume and --finetune in run.sh.

Inference and visualization

The trained models can be obtained after finishing the above steps. You can also download the models for the Total-Text, SCUT-CTW1500, ICDAR2013, ICDAR2015 and inversetext datasets from GoogleDrive or BaiduNetDisk password: 2k2m. Then you can use test.sh or predict.py to output results and visualization.

Evaluation

First, download the ground-truth files (GoogleDrive, BaiduNetDisk password: 35tr) and lexicons (GoogleDrive, BaiduNetDisk password: 9eml), and extracted them into the evaluation folder.

evaluation
│  eval.py
├─gt
│  ├─gt_ctw1500
│  ├─gt_ic13
│  ├─gt_ic15
│  └─gt_totaltext
└─lexicons
    ├─ctw1500
    ├─ic13
    ├─ic15
    └─totaltext

We provide two evaluation scripts, including eval_ic15.py for evaluating icdar2015 dataset, and eval.py for other benchmarks. The command for evaluating the inference result of Total-Text is:

python evaluation/eval.py \
       --result_path ./output/totaltext_val.json \
       # --with_lexicon \ # uncomment this line if you want to evaluate with lexicons.
       # --lexicon_type 0 # used for ICDAR2013 and ICDAR2015. 0: Generic; 1: Weak; 2: Strong.

Performance

The end-to-end recognition performances of SPTSv2 on five public benchmarks are:

Dataset	Strong	Weak	Generic
ICDAR 2013	93.9	91.8	88.6
ICDAR 2015	82.3	77.7	72.6

Dataset	None	Full
Total-Text	75.5	84.0
inversetext	63.5	74.9
SCUT-CTW1500	63.6	84.3

Citation

@inproceedings{peng2022spts,
  title={SPTS: Single-Point Text Spotting},
  author={Peng, Dezhi and Wang, Xinyu and Liu, Yuliang and Zhang, Jiaxin and Huang, Mingxin and Lai, Songxuan and Zhu, Shenggao and Li, Jing and Lin, Dahua and Shen, Chunhua and Bai, Xiang and Jin, Lianwen},
  booktitle={Proceedings of the 30th ACM International Conference on Multimedia},
  year={2022}
}

@article{liu2023spts,
  title={SPTS v2: Single-Point Scene Text Spotting},
  author={Liu, Yuliang and Zhang, Jiaxin and Peng, Dezhi and Huang, Mingxin and Wang, Xinyu and Tang, Jingqun and Huang, Can and Lin, Dahua and Shen, Chunhua and Bai, Xiang and Jin, Lianwen},
  journal={arXiv preprint arXiv:2301.01635},
  year={2023}
}

Copyright

This repository can only be used for non-commercial research purpose.

For commercial use, please contact Jiaxin Zhang (zhangjiaxin.zjx1995@bytedance.com).

Acknowledgement

We sincerely thank Stable-Pix2Seq, Pix2Seq, DETR, Swin-Transformer, SPTS and ABCNet for their excellent works.