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Reference line extraction for automated data-entry system using wavelet transform
Author(s)
Date Issued
January 1, 2000
Type
Conference Paper
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
Proceedings of SPIE the International Society for Optical Engineering, 3967, 110-114, 2000