Detection and recognition of erasures in on-line captured paper forms

  • Authors:
  • Alain Wiart;Thierry Paquet;Laurent Heutte

  • Affiliations:
  • Laboratoire LITIS - EA 4051, UFR des Sciences, Université de Rouen, 76800 Saint-Etienne du Rouvray, France;Laboratoire LITIS - EA 4051, UFR des Sciences, Université de Rouen, 76800 Saint-Etienne du Rouvray, France;Laboratoire LITIS - EA 4051, UFR des Sciences, Université de Rouen, 76800 Saint-Etienne du Rouvray, France

  • Venue:
  • Pattern Recognition Letters
  • Year:
  • 2007

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Abstract

This paper presents a method to automatically locate and recognize erasures in on-line captured handwritten documents in order to avoid a subsequent misrecognition of characters and words. We offer a comprehensive definition of the ambiguous concept of erasure in handwriting that results in a more accurate characterization of the different types of erasures. Thanks to this characterization, a preprocessing step, placed upstream of the word recognition engine, enables to classify through an MLP each couple of connected strokes as being an erasure or not using a low-level feature set. We evaluate our system on a real handwritten document database and show how our system can be tuned to operate in accordance with various recognition engines thus leading to high performance in erasure detection and recognition.