International Journal on Document Analysis and Recognition

, Volume 3, Issue 1, pp 34–39

Pitch-based segmentation and recognition of dot-matrix text

  • Berrin A. Yanikoglu
Original papers

DOI: 10.1007/PL00013553

Cite this article as:
Yanikoglu, B. IJDAR (2000) 3: 34. doi:10.1007/PL00013553


Dot-matrix text recognition is a difficult problem, especially when characters are broken into several disconnected components. We present a dot-matrix text recognition system which uses the fact that dot-matrix fonts are fixed-pitch, in order to overcome the difficulty of the segmentation process. After finding the most likely pitch of the text, a decision is made as to whether the text is written in a fixed-pitch or proportional font. Fixed-pitch text is segmented using a pitch-based segmentation process that can successfully segment both touching and broken characters. We report performance results for the pitch estimation, fixed-pitch decision and segmentation, and recognition processes.

Key words: Dot-matrix – Fixed-pitch – Pitch estimation – Segmentation – OCR

Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • Berrin A. Yanikoglu
    • 1
  1. 1.Faculty of Engineering and Natural Sciences, Sabanci University, Orhanli 81474 Istanbul, Turkey; e-mail: TR