Deletion of Ellipse Enclosing Characters

In this paper, we introduce a new simple proposal for deletion of ellipse enclosing character in documentary images. In this proposal, ellipse enclosing character is labeled, parameters for the center point of an ellipse are found using circumscribing rectangle of the labeled ellipse, the parameters for half-lengths of the major axis and minor axis are determined by finding the farthest point and the nearest point on labeled ellipse from the center point, the ellipse orientation is determined by finding the angle between major axis and horizontal direction, then the ellipse is modeled using these parameters. Ellipse detection is conducted counting the number of black pixels on the ellipse model. Finally, ellipse enclosing characters are distinguished from characters having an ellipse shape. Results of the experiments using appropriate images showed the effectiveness of our proposal. The sections that follow detail problems overcome and our projected work.

[1]  N. Otsu A threshold selection method from gray level histograms , 1979 .

[2]  Shinichiro Omachi,et al.  Isolated Character Recognition by Searching Feature Points and Voting , 2005 .

[3]  Ling-Hwei Chen,et al.  A fast ellipse/circle detector using geometric symmetry , 1995, Pattern Recognit..

[4]  Edward Roy Davies Finding ellipses using the generalised Hough transform , 1989, Pattern Recognit. Lett..

[5]  川中 普晴 Document recognition and XML generation of tabular form discharge summaries for analogous case search system , 2009 .

[6]  Mark S. Nixon,et al.  On using directional information for parameter space decomposition in ellipse detection , 1996, Pattern Recognit..

[7]  Saburo Tsuji,et al.  Detection of Ellipses by a Modified Hough Transformation , 1978, IEEE Transactions on Computers.

[8]  Peter Kwong-Shun Tam,et al.  Modification of hough transform for circles and ellipses detection using a 2-dimensional array , 1992, Pattern Recognit..

[9]  H Kawanaka,et al.  Document recognition and XML generation of tabular form discharge summaries for analogous case search system. , 2007, Methods of information in medicine.

[10]  Qiang Ji,et al.  A new efficient ellipse detection method , 2002, Object recognition supported by user interaction for service robots.

[11]  Qiang Ji,et al.  A statistically efficient method for ellipse detection , 1999, Proceedings 1999 International Conference on Image Processing (Cat. 99CH36348).

[12]  Tomokazu Takahashi,et al.  A recognition method for camera-captured low-quality characters using blur information , 2006 .

[13]  Hiroshi Tanaka,et al.  Online handwriting recognition technology and its applications , 2004 .