hocr-detect-columns

Detects columns and indented lines in an hOCR file. This Python 3 script is used in the NYPL's NYC Space/Time Directory project to extract data from digitized city directories.

Most OCR tools can produce hOCR files — we are using OCRopus. See https://github.com/nypl-spacetime/ocr-scripts for more details.

Installation

hocr-detect-columns was built and tested using Python 3.5, and depends on the following packages:

• NumPy
• Pillow
• Jinja2

Usage

python3 detect_columns.py /path/to/hocr.html

hocr-detect-columns will parse hocr.html and create three files in path/to:

• bboxes.json
• lines.txt
• visualization.html

How does it work?

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