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An Improved Hough Transform Using Valid Features

유효 특징점을 이용한 개선된 허프변환

  • Oh, Jeong-Su (Department of Image Science & Engineering, Pukyong National University)
  • Received : 2014.05.16
  • Accepted : 2014.06.23
  • Published : 2014.09.30

Abstract

The Hough transform (HT), that is a typical algorithm for detecting lines in images, needs considerable computational costs and easily detects pseudo-lines on the real world images, because of the large amount of features generated by their complex background or noise. This paper proposes an improved HT that add a preprocessing to estimate the validity of features to the conventional HT. The feature estimation can remove a lot of inessential features for the line detection using a pattern of $3{\times}3$ block features. Experiments using various images show that the proposed algorithm saves computational costs by removing 14%~58% of features depending on images and besides it is superior to the conventional HT in valid line detection.

영상 내 직선을 검출하는 대표적인 알고리즘인 허프변환은 실세계 영상들에 적용할 때 그들의 복잡한 배경이나 잡음에 의해 생성되는 방대한 특징점들 때문에 상당한 계산량을 필요로 하고 쉽게 의사 직선을 검출한다. 본 논문은 기존 허프변환에 특징점의 유효성을 평가하는 전처리를 추가한 개선된 허프변환을 제안한다. 특징점 평가는 $3{\times}3$ 블록 특징점들의 패턴을 이용해 직선 검출에 필수적이지 않은 많은 특징점들을 제거할 수 있다. 다양한 영상을 대상으로 한 실험들에서 제안된 알고리즘은 영상에 따라 특징점들의 14%~58%를 제거하여 계산량을 줄여줄 뿐만 아니라 유효 직선 검출에서도 기존 알고리즘보다 우수함을 보여준다.

Keywords

References

  1. R.C. Gonzalez, and R.E. Wood, Digital Image Processing, Prentice Hall, 2008.
  2. A. McAndrew, Introduction to Digital Image Processing with MATLAB, Course Technology, 2004.
  3. V. Hardzeyeu and F. Klefenz, "On using the hough transform for driving assistance applications," in Proc. 4th Int. Conf. Intell. Comput. Commun. Process., pp.91-98, 2008.
  4. R.O. Duda, and P.E. Hart. "Use of the Hough transformation to detect lines and curves in pictures," Communications of the ACM Vol. 15, No. 1, pp. 11-15, 1972. https://doi.org/10.1145/361237.361242
  5. M.C. Yang, J.S. Lee, C.C. Lien, and C.L. Huang, "Hough transform modified by line connectivity and line thickness," IEEE Transactions on PAMI, Vol. 19, No. 8, pp. 905-910, 1997. https://doi.org/10.1109/34.608293
  6. Jeongtea Kim,"A Novel Line Detection Method Using Gradient Direction Based Hough Transform," The Transaction of The Koean Institute of Electrical Engineers, Vol. 56, No. 1, pp. 197-205, 2007.
  7. F. O'Gorman and M.B. Clowes, "Finding picture edges through collinearity of feature points. IEEE Trans. Comput. Vol. 25, No. 4, pp. 449-456, 1976.
  8. M. Atiquuaman, "Multiresolution Hough Transform-An Ef ficient Method of Detecting Patterns in Images." IEEE Transactions on PAMI, Vol. 14, No. 11, 1992.
  9. S. Guo, T. Pridmore, Y. Kong, and X. Zhang, "An improved Hough transform voting scheme utilizing surround suppression," Pattern Recognition Letters, Vol. 30, No. 13, pp. 1241-1252, 2009. https://doi.org/10.1016/j.patrec.2009.05.003