Joint Handwritten Text Recognition and Word Classification for Tabular Information Extraction

• In this paper, we present a system for extracting tabular information from loosely structured handwritten documents. The system consists of three parts, (i) a u-net like CNN-based method for text detection and segmentation, (ii) a new attention-based method for simultaneous text recognition and classification of word-parts, and (iii) a method for matching the word parts into a tabular structure for each entry. A key contribution is the observation that the new attention-based recognition and classification module makes it possible for improved spatial analysis of the tabular information. The method is evaluated on a unique historical document: The Swedish Wealth Tax of 1571, consisting of 11,453 pages of hand-written tax records. The evaluation shows that the system provides a significant improvement to the state-of-the-art to the problem of tabular extraction from loosely structured historical documents.

Ämnesord

NATURVETENSKAP  -- Data- och informationsvetenskap -- Datorseende och robotik (hsv//swe)

NATURAL SCIENCES  -- Computer and Information Sciences -- Computer Vision and Robotics (hsv//eng)

SAMHÄLLSVETENSKAP  -- Ekonomi och näringsliv -- Ekonomisk historia (hsv//swe)

SOCIAL SCIENCES  -- Economics and Business -- Economic History (hsv//eng)

Nyckelord

Histograms

Image segmentation

Text recognition

Finance

Writing

Information retrieval

Decoding

Publikations- och innehållstyp

kon (ämneskategori)

ref (ämneskategori)