ZHAO Xiao-Chuan, LUO Qing-sheng, CHEN Shao-bo. Improved fast line detection method in images[J]. 光学精密工程, 2010,18(7): 1654-1660 DOI: 10.3788/OPE.20101807.1654.
In order to improve the detection speed for lines in digital images
an improved detection method was proposed by combining the time-frequency domain transform and the spatial domain transform. Firstly
the wavelet lifting was used to extract the low frequency profile information and to restrain high frequency noises. Then
the gradient of a image was computed to obtain a binary image. On the basis of the principles that a line can be determined by two points and a line in the image is mapped to a point in the Hough Transform
the non-zero pixels were mapped into the accumulator cells with great probability instead of all accumulator cells following the detection sequence from the local to the global. Finally
the accumulator cells were counted to determine the parameters of lines in the image. It costs 213 ms to detect lines in the image with pixels of 128128 by using the method proposed in this paper
which increases the detection speed for lines in images effectively.
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references
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