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Nandini N. and  Srikanta Murthy K. and  G. Hemantha Kumar,  Estimation of Skew Angle in Binary Document Images Using Hough Transform.   journal   = {International Journal of Computer, Electrical, Automation, Control and Information Engineering}, [online]. World Academy of Science, Engineering and Technology. June 2008, vol. 18(6). 1812 - 1817[viewed 18 December 2017]. Available from: http://waset.org/publications/8967.