A novel Hough transform method for line detection by enhancing accumulator array

Authors:
Junhong Ji;Guodong Chen;Lining Sun
Affiliations:
State Key Laboratory of Robotics and System, Harbin Institute of Technology, No.2, Yikuang Str., Harbin 150080, PR China;State Key Laboratory of Robotics and System, Harbin Institute of Technology, No.2, Yikuang Str., Harbin 150080, PR China;State Key Laboratory of Robotics and System, Harbin Institute of Technology, No.2, Yikuang Str., Harbin 150080, PR China
Venue:
Pattern Recognition Letters
Year:
2011

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Abstract

In this paper, an improved Hough transform (HT) method is proposed to robustly detect line segments in images with complicated backgrounds. The work focuses on detecting line segments of distinct lengths, totally independent of prior knowledge of the original image. Based on the characteristics of accumulation distribution obtained by conventional HT, a local operator is implemented to enhance the difference between the accumulation peaks caused by line segments and noise. Through analysis of the effect of the operator, a global threshold is obtained in the histogram of the enhanced accumulator to detect peaks. Experimental results are provided to demonstrate the efficiency and robustness of the proposed method.