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22 December 1999 Reference line extraction for automated data-entry system using wavelet transform
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Proceedings Volume 3967, Document Recognition and Retrieval VII; (1999)
Event: Electronic Imaging, 2000, San Jose, CA, United States
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.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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);

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