Abstract

We propose a novel method which detects convex and concave corners using radial projection. The sum of two neighbors' differences at the local maxima or minima of the radial projection is compared with the angle threshold for detecting corners. In addition, the use of oriented bounding box trees and partial circles makes it possible to detect the corners of complex shapes. The experimental results show that the proposed method can separately detect the convex and concave corners, and that this method is scale invariant.

© 2011 Optical Society of Korea

PDF Article

References

  • View by:
  • |
  • |

  1. M. Zhenjiang, "Zernike moment-based image shape analysis and its application," Patt. Recogn. Lett. 21, 169-177 (2000).
    [CrossRef]
  2. D. Lee and J. H. Choi, "Precise detection of car license plates by locating main characters," J. Opt. Soc. Korea 14, 376-382 (2010).
    [CrossRef]
  3. M. K. Kim, "Adaptive thresholding technique for binarization of license plate image," J. Opt. Soc. Korea 14, 368-375 (2010).
    [CrossRef]
  4. S. Loncaric, "A survey of shape analysis techniques," Patt. Recogn. 31, 983-1001 (1998).
    [CrossRef]
  5. S. Pei and C. Lin, "The detection of dominant points on digital curves by scale-space filtering," Patt. Recogn. 25, 1307-1314 (1992).
    [CrossRef]
  6. C. Teh and R. T. Chin, "On the detection of dominant points on digital curves," IEEE Trans. Patt. Anal. Mach. Intell. 11, 859-872 (1989).
    [CrossRef]
  7. C. T. Zahn and R. Z. Roskies, "Fourier descriptors for plane closed curves," IEEE Trans. Comp. 21, 269-281 (1972).
    [CrossRef]
  8. G. H. Granlund, "Fourier preprocessing for hand print character recognition," IEEE Trans. Comp. 21, 195-201 (1972).
    [CrossRef]
  9. M. Hu, "Visual pattern recognition by moment invariants," IRE Trans. Inf. Theory 8, 179-187 (1962).
  10. Z. Zhou and X. Geng, "Projection functions for eye detection," Patt. Recogn. 37, 1049-1056 (2004).
    [CrossRef]
  11. D. Tsai and Y. Tsai, "Rotation-invariant pattern matching with color ring-projection," Patt. Recogn. 35, 131-141 (2002).
    [CrossRef]
  12. Y. Kwon, H. Park, J. Liu, and M. A. Nascimento, "Radial projection: a feature extraction method for topographical shapes," LNCS 3769, 582-593 (2005).
  13. S. Gottschalk, M. C. Lin, and D. Manocha, "OBB tree: a hierarchical structure for rapid interference detection," in Proc. Int. Conf. on Computer Graphics and Interactive Techniques (New Orleans, USA, Aug. 1996), pp. 171-180.

2010 (2)

D. Lee and J. H. Choi, "Precise detection of car license plates by locating main characters," J. Opt. Soc. Korea 14, 376-382 (2010).
[CrossRef]

M. K. Kim, "Adaptive thresholding technique for binarization of license plate image," J. Opt. Soc. Korea 14, 368-375 (2010).
[CrossRef]

2005 (1)

Y. Kwon, H. Park, J. Liu, and M. A. Nascimento, "Radial projection: a feature extraction method for topographical shapes," LNCS 3769, 582-593 (2005).

2004 (1)

Z. Zhou and X. Geng, "Projection functions for eye detection," Patt. Recogn. 37, 1049-1056 (2004).
[CrossRef]

2002 (1)

D. Tsai and Y. Tsai, "Rotation-invariant pattern matching with color ring-projection," Patt. Recogn. 35, 131-141 (2002).
[CrossRef]

2000 (1)

M. Zhenjiang, "Zernike moment-based image shape analysis and its application," Patt. Recogn. Lett. 21, 169-177 (2000).
[CrossRef]

1998 (1)

S. Loncaric, "A survey of shape analysis techniques," Patt. Recogn. 31, 983-1001 (1998).
[CrossRef]

1996 (1)

S. Gottschalk, M. C. Lin, and D. Manocha, "OBB tree: a hierarchical structure for rapid interference detection," in Proc. Int. Conf. on Computer Graphics and Interactive Techniques (New Orleans, USA, Aug. 1996), pp. 171-180.

1992 (1)

S. Pei and C. Lin, "The detection of dominant points on digital curves by scale-space filtering," Patt. Recogn. 25, 1307-1314 (1992).
[CrossRef]

1989 (1)

C. Teh and R. T. Chin, "On the detection of dominant points on digital curves," IEEE Trans. Patt. Anal. Mach. Intell. 11, 859-872 (1989).
[CrossRef]

1972 (2)

C. T. Zahn and R. Z. Roskies, "Fourier descriptors for plane closed curves," IEEE Trans. Comp. 21, 269-281 (1972).
[CrossRef]

G. H. Granlund, "Fourier preprocessing for hand print character recognition," IEEE Trans. Comp. 21, 195-201 (1972).
[CrossRef]

1962 (1)

M. Hu, "Visual pattern recognition by moment invariants," IRE Trans. Inf. Theory 8, 179-187 (1962).

IEEE Trans. Comp. (2)

C. T. Zahn and R. Z. Roskies, "Fourier descriptors for plane closed curves," IEEE Trans. Comp. 21, 269-281 (1972).
[CrossRef]

G. H. Granlund, "Fourier preprocessing for hand print character recognition," IEEE Trans. Comp. 21, 195-201 (1972).
[CrossRef]

IEEE Trans. Patt. Anal. Mach. Intell. (1)

C. Teh and R. T. Chin, "On the detection of dominant points on digital curves," IEEE Trans. Patt. Anal. Mach. Intell. 11, 859-872 (1989).
[CrossRef]

IRE Trans. Inf. Theory (1)

M. Hu, "Visual pattern recognition by moment invariants," IRE Trans. Inf. Theory 8, 179-187 (1962).

Journal of the Optical Society of Korea (2)

D. Lee and J. H. Choi, "Precise detection of car license plates by locating main characters," J. Opt. Soc. Korea 14, 376-382 (2010).
[CrossRef]

M. K. Kim, "Adaptive thresholding technique for binarization of license plate image," J. Opt. Soc. Korea 14, 368-375 (2010).
[CrossRef]

LNCS (1)

Y. Kwon, H. Park, J. Liu, and M. A. Nascimento, "Radial projection: a feature extraction method for topographical shapes," LNCS 3769, 582-593 (2005).

Patt. Recogn. (4)

S. Loncaric, "A survey of shape analysis techniques," Patt. Recogn. 31, 983-1001 (1998).
[CrossRef]

S. Pei and C. Lin, "The detection of dominant points on digital curves by scale-space filtering," Patt. Recogn. 25, 1307-1314 (1992).
[CrossRef]

Z. Zhou and X. Geng, "Projection functions for eye detection," Patt. Recogn. 37, 1049-1056 (2004).
[CrossRef]

D. Tsai and Y. Tsai, "Rotation-invariant pattern matching with color ring-projection," Patt. Recogn. 35, 131-141 (2002).
[CrossRef]

Patt. Recogn. Lett. (1)

M. Zhenjiang, "Zernike moment-based image shape analysis and its application," Patt. Recogn. Lett. 21, 169-177 (2000).
[CrossRef]

Proc. Int. Conf. on Computer Graphics and Interactive Techniques (1)

S. Gottschalk, M. C. Lin, and D. Manocha, "OBB tree: a hierarchical structure for rapid interference detection," in Proc. Int. Conf. on Computer Graphics and Interactive Techniques (New Orleans, USA, Aug. 1996), pp. 171-180.

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.