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  • Research Article
  • Open Access

An Embedded Application for Degraded Text Recognition

EURASIP Journal on Advances in Signal Processing20052005:370317

  • Received: 24 December 2003
  • Published:


This paper describes a mobile device which tries to give the blind or visually impaired access to text information. Three key technologies are required for this system: text detection, optical character recognition, and speech synthesis. Blind users and the mobile environment imply two strong constraints. First, pictures will be taken without control on camera settings and a priori information on text (font or size) and background. The second issue is to link several techniques together with an optimal compromise between computational constraints and recognition efficiency. We will present the overall description of the system from text detection to OCR error correction.

Keywords and phrases

  • text detection
  • thresholding
  • character recognition
  • error correction

Authors’ Affiliations

Laboratoire de Théorie des Circuits et Traitement du Signal, Faculté Polytechnique de Mons, Bâtiment Multitel-Initialis, 1 avenue Copernic, Mons, 7000, Belgium


© Thillou et al. 2005