Document filters using morphological and geometrical features of characters

Image and Vision Computing

Volumn 19, Issue 12, 2001, Pages 847-855

  Ping, Zhang ^a,b   Lihui, Chen ^a,b  

^a NANYANG TECHNOLOGICAL UNIVERSITY   (Singapore)

^b NONE   (Singapore)

Author keywords

Binary document image filter; Image geometric structure filter; Mathematical morphology; Optical character recognition

Indexed keywords

EID: 0345977332     PISSN: 02628856     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0262-8856(01)00048-8     Document Type: Article

References (13)

1. M. Cumplido, P. Montolio, A. Gasull, Morphological preprocessing and binarization for OCR systems, Mathematical Morphology and Its Applications to Image and Signal Processing, Kluwer Academic Publishers, Dordrecht, 1996, pp. 393-400.
2. T. Taxt, O.D. Trier, Evaluation of binarization methods for document images, IEEE Trans. Pattern Analys. Mach. Intelligence 17 (3) (1995) 312-315.
3. J. Astola, T.G. Campbell, On computation of the running median, IEEE Trans. Acoust., Speech, Signal Process. 37 (4) (1989) 572-574.
4. V.V. Bapeswara Rao, K. Sankara Rao, A new algorithm for real-time median filtering, IEEE Trans. Acoust. Speech, Signal Process. 34 (11) (1986) 1674-1675.
5. Jaakko Astola, Lasse Koskinen, Yrjo Neuvo, Statistical properties of discrete morphological filters, chapter 3 of mathematical morphology, Image Processing, Marcel Dekker, New York, 1993, pp. 93-120.
6. Su, Liang, M. Ahmadi, M. Sheidhar, A morphological approach to text string extraction from regular periodic overlapping text/background images, Proceedings ICIP-94, Austin, TX, USA, 13th-16th, 1994, pp. 144-148.
7. Y. Liu, R. Fenrich, S.N. Shrihari, An object attribute threshold algorithm for document image binarization, Proceedings of the Second International Conference on Document Analysis and Recognition, Tsukuba, Japan, 1993, pp. 278-282.
8. H. Ozwa, T. Nakgawa, A character image enhancement method from characters with various background images, Proceedings of the Second International Conference on Document Analysis and Recognition, Tsukuba, Japan, 1993, pp. 58-61.
9. J.N. Said, M. Cherit, C.Y. Suen, Dynamical morphological processing: a fast method for base line extraction, Proceedings of the 13th International Conference on Pattern Recognition, Vienna, Austria, vol. 2, 1996, pp. 8-12.
10. G. Matheron, Random Sets and Integral Geometry, Wiley, New York, 1975.
11. J. Serra, Image Analysis and Mathematical Morphology, Academic Press, London, 1982.
12. E.R. Dougherty, Jaakko Astola, An Introduction to Nonlinear Image Processing, vol. TT16, SPIE optical engineering press, Bellingham, Wash, 1994.
13. G. Agam, I. Dinstein, Adaptive Directional Morphology with Application to Document Analysis, Kluwer Academic Publishers, Dordrecht, 1996, pp. 401-408.