摘要: Document image processing has become an increas- ingly important technology in the automation of office documentation tasks. Automatic document scanners such as text readers and op- tical character recognition (OCR) systems are essential compo- nent capable those One problems this field is that to be read not always placed correctly on a flat-bed scanner. This means may skewed scanner bed, resulting image. skew detrimental effect analysis, under- standing, segmentation recognition. Conse- quently, detecting correcting it issues realizing practical reader. We describe new algorithm for detection. then compare performance results detection other published methods from O'Gorman, Hinds, Le, Baird, Postl, Ak- iyama. Finally, we discuss theory different approaches taken solve problem docu- ments. The correction propose been shown extremely fast, with run times averaging under 0.25 CPU sec- onds calculate angle DEC 5000/20 workstation. © 1996 SPIE IS&T.
harvard.edu
sci-hub.se 参考文章(15)
Henry S. Baird, The skew angle of printed documents Document image analysis. pp. 204- 208 ,(1995)
Teruo Akiyama, Norihiro Hagita, Automated entry system for printed documents Pattern Recognition. ,vol. 23, pp. 1141- 1154 ,(1990) , 10.1016/0031-3203(90)90112-X
Sargur N. Srihari, Venugopal Govindaraju, Analysis of textual images using the Hough transform machine vision applications. ,vol. 2, pp. 141- 153 ,(1989) , 10.1007/BF01212455
Daniel S Le, George R Thoma, Harry Wechsler, Automated page orientation and skew angle detection for binary document images Pattern Recognition. ,vol. 27, pp. 1325- 1344 ,(1994) , 10.1016/0031-3203(94)90068-X
Akihide Hashizume, Pen-Shu Yeh, Azriel Rosenfeld, A method of detecting the orientation of aligned components Pattern Recognition Letters. ,vol. 4, pp. 125- 132 ,(1986) , 10.1016/0167-8655(86)90034-6
Richard O. Duda, Peter E. Hart, Use of the Hough transformation to detect lines and curves in pictures Communications of the ACM. ,vol. 15, pp. 11- 15 ,(1972) , 10.1145/361237.361242
R. Smith, A simple and efficient skew detection algorithm via text row accumulation international conference on document analysis and recognition. ,vol. 2, pp. 1145- 1148 ,(1995) , 10.1109/ICDAR.1995.602124
Y. Ishitani, Document skew detection based on local region complexity Proceedings of 2nd International Conference on Document Analysis and Recognition (ICDAR '93). pp. 49- 52 ,(1993) , 10.1109/ICDAR.1993.395784
K.S. Baird, Anatomy of a versatile page reader Proceedings of the IEEE. ,vol. 80, pp. 1059- 1065 ,(1992) , 10.1109/5.156469
J. Liu, C.-M. Lee, R.-B. Shu, An efficient method for the skew normalization of a document image international conference on pattern recognition. pp. 122- 125 ,(1992) , 10.1109/ICPR.1992.201942