TWO SIMPLE ALGORITHMS FOR DOCUMENT IMAGE PREPROCESSING - Making a document scanning application more user-friendly

Aleš Jaklič, Blaž Vrabec

Abstract

Automatic Document scanning is a useful part of an information system at personal identification checkpoints such as airports, border crossings, banks etc. Current applications usually require a great deal of carefulness of the scanner operators – the document has to be positioned horizontally and special care must be taken to detect corrupt scans that can occur. In this work we describe ideas for two independent algorithms for the document rotation correction and automatic detection of corrupt scans. One algorithm relies on the Hough transformation and the other on brightness gradient of the image. The output of each algorithm is a cropped image of the document in horizontal orientation, which can be used as input for further processing (such as OCR). Also the estimate of scan corruption is returned. Also shown are some testing results of the algorithm prototypes written in MATLAB environment.

References

  1. Duda, R.O., Hart, P.E., 1972. Use of the Hough Transformation to Detect Lines and Curves. In Communications of the ACM, Vol.15, No. 1 Gonzales, R.C., Woods, R.E., 1992. Digital Image Processing. Addison Wesley.
  2. Horn, B.K.P 1986. Robot Vision. MIT Press.
  3. Hough, V.C., 1962. Methods and Means of Recognising Complex Patterns. US Patent 3069654.
  4. Oppenheim, A.V., Schafer, R.W., 1999. Discrete-time Signal Processing. Prentice Hall, 2nd edition.
Download


Paper Citation


in Harvard Style

Jaklič A. and Vrabec B. (2005). TWO SIMPLE ALGORITHMS FOR DOCUMENT IMAGE PREPROCESSING - Making a document scanning application more user-friendly . In Proceedings of the Seventh International Conference on Enterprise Information Systems - Volume 5: ICEIS, ISBN 972-8865-19-8, pages 116-121. DOI: 10.5220/0002554501160121


in Bibtex Style

@conference{iceis05,
author={Aleš Jaklič and Blaž Vrabec},
title={TWO SIMPLE ALGORITHMS FOR DOCUMENT IMAGE PREPROCESSING - Making a document scanning application more user-friendly},
booktitle={Proceedings of the Seventh International Conference on Enterprise Information Systems - Volume 5: ICEIS,},
year={2005},
pages={116-121},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0002554501160121},
isbn={972-8865-19-8},
}


in EndNote Style

TY - CONF
JO - Proceedings of the Seventh International Conference on Enterprise Information Systems - Volume 5: ICEIS,
TI - TWO SIMPLE ALGORITHMS FOR DOCUMENT IMAGE PREPROCESSING - Making a document scanning application more user-friendly
SN - 972-8865-19-8
AU - Jaklič A.
AU - Vrabec B.
PY - 2005
SP - 116
EP - 121
DO - 10.5220/0002554501160121