Reference line extraction for automated data-entry system using wavelet transform

Sakreya Chitwong; Seksan Phonsri; Punya Thitimajshima

doi:10.1117/12.373483

22 December 1999 Reference line extraction for automated data-entry system using wavelet transform

Sakreya Chitwong, Seksan Phonsri, Punya Thitimajshima

Proceedings Volume 3967, Document Recognition and Retrieval VII; (1999) https://doi.org/10.1117/12.373483
Event: Electronic Imaging, 2000, San Jose, CA, United States

Abstract

It is common that most document forms opt for the use of straight line as a reference position for filled information. The automated data-entry systems of such documents require an ability to search these reference lines so that the location of information in the forms can be known. This paper proposes a wavelet-based algorithm for extracting these reference lines in business forms. Stationary wavelet transform is used to transform a gray-level document image into different frequency-band images. The horizontal detail subband is then selected and passed through a post-processing to produce a binary bitmap of reference lines. The experimental results on synthetic and real document images will be given to illustrate the usefulness of such an algorithm.

Citation Download Citation

Sakreya Chitwong, Seksan Phonsri, and Punya Thitimajshima "Reference line extraction for automated data-entry system using wavelet transform", Proc. SPIE 3967, Document Recognition and Retrieval VII, (22 December 1999); https://doi.org/10.1117/12.373483

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