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table-extract's Introduction

tesseract-tables

A tool for extracting tables, figures, maps, and pictures from PDFs using Tesseract

preprocess.sh

Script for prepping a PDF for table extraction. Converts each page of the PDF to a PNG with Ghostscript, then runs the PNGs through Tesseract. Also runs each page through annotate.py to assist in debugging. Assumes local installation of tesseract-ocr.

Example usage

./preprocess.sh ./my_document_processed my_document.pdf

This creates the file structure necessary for extraction:

document_name
  annotated (pngs of what tesseract sees)
  png (each page of the PDF as a PNG image)
  tables (extractions)
  tesseract (HTML for each page produced by tesseract)
  orig.pdf (The original document)
  text.txt (The extracted text layer)

do_extract.py

Script for processing the output of pdf2hocr.

Example usage

python do_extract.py ~/Documents/doc

annotate.py

Creates a PNG that shows the areas of a page identified by Tesseract. Useful for debugging.

helpers.py

Various functions for processing tables.

table_extractor.py

Entry script to table extraction.

extract_tables(document_path)

Process a document for tables. Pass it a path to a document that has been pre-processed with pdf2hocr

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