benhoyle / patent-label

Detect and read figure labels in patent drawings.

GoFigure/patent-label

Read figure labels from patent drawings.

Installation

Packages needed:

• PIL or pillow
• scipy
• skimage
• pytesseract

Usage

Write an output.csv file with the name of the input image, list of bounding boxes, and list of OCR text results; with one entry line per image:

python label_recognition.py --image_path [path_to_images]

Full help message with options:

python label_recognition.py -h

Evaluating results

The regular expression parser and the python script to calculate the precision and recall is in find_only_label.py. All the .txt files in east_png_results_new.zip is used together with find_only_label.py.

Acknowledgements

If you find this code useful, please cite:

• Ming Gong, Xin Wei, Diane Oyen, Jian Wu, Martin Gryder, and Liping Yang. Recognizing Figure Labels in Patents. In AAAI Workshop on Scientific Document Understanding. 2021.

License

BSD-3. See LICENSE.