craft-text-detection

CRAFT: Character-Region Awareness For Text detection

Official Pytorch implementation of CRAFT text detector | Paper | Pretrained Model | Supplementary

Youngmin Baek, Bado Lee, Dongyoon Han, Sangdoo Yun, Hwalsuk Lee.

Clova AI Research, NAVER Corp.

Packaged by Ashish Jha

Sample Results

Overview

PyTorch implementation for CRAFT text detector that effectively detect text area by exploring each character region and affinity between characters. The bounding box of texts are obtained by simply finding minimum bounding rectangles on binary map after thresholding character region and affinity scores.

Updates

13 Jun, 2019: Initial update 20 Jul, 2019: Added post-processing for polygon result 28 Sep, 2019: Added the trained model on IC15 and the link refiner 25 Jan, 2020: Put it together as a PyPI package

Getting started

Use it straight from PyPI

Installation

pip install craft-text-detection

Usage

import craft
import cv2
img = cv2.imread('/path/to/image/file')

# run the detector
bboxes, polys, heatmap = craft.detect_text(img)

# view the image with bounding boxes
img_boxed = craft.show_bounding_boxes(img, bboxes)
cv2.imshow('fig', img_boxed)

# view detection heatmap
cv2.imshow('fig', heatmap)

Use from source - install dependencies

Requirements

• PyTorch>=0.4.1
• torchvision>=0.2.1
• opencv-python>=3.4.2
• check requiremetns.txt

pip install -r requirements.txt

Training

The code for training is not included in this repository, and we cannot release the full training code for IP reason.

Arguments for detect_text

• --text_threshold: text confidence threshold
• --low_text: text low-bound score
• --link_threshold: link confidence threshold
• --canvas_size: max image size for inference
• --mag_ratio: image magnification ratio
• --refine: use link refiner for sentence-level dataset
• --refiner_model: pretrained refiner model

Links

• WebDemo : https://demo.ocr.clova.ai/
• Repo of recognition : https://github.com/clovaai/deep-text-recognition-benchmark

Citation

@inproceedings{baek2019character,
  title={Character Region Awareness for Text Detection},
  author={Baek, Youngmin and Lee, Bado and Han, Dongyoon and Yun, Sangdoo and Lee, Hwalsuk},
  booktitle={Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition},
  pages={9365--9374},
  year={2019}
}

License

Copyright (c) 2019-present NAVER Corp.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.