Line target extraction of synthetic aperture sonar image based on Hough line detection and region growing

doi:10.13474/j.cnki.11-2246.2021.337

Bulletin of Surveying and Mapping ›› 2021, Vol. 0 ›› Issue (11): 48-53.doi: 10.13474/j.cnki.11-2246.2021.337

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Line target extraction of synthetic aperture sonar image based on Hough line detection and region growing

OUYANG Quanping^1,2, ZHOU Li², WANG Sheng², SONG Shilin³, LU Bin², FENG Junjun²

1. Wuhan Changjiang Waterway Rescue and Salvage Bureau, Wuhan 430014, China;
2. School of Marine Technology and Marine Technology and Geomatics, Jiangsu Ocean University, Lianyungang 222005, China;
3. North China Sea Marine Technical Support Center, State Oceanic Administration, Qingdao 266033, China

Received:2020-11-02 Online:2021-11-25 Published:2021-12-02

Abstract

Abstract: A line target extraction algorithm based on Hough line detection and region growing is proposed to solve the problem of small width (diameter) of line target and serious influence of speckle noise on the image in the process of synthetic aperture sonar image line target extraction. Firstly, Otsu algorithm is used to calculate the growth termination threshold of the region and preliminarily suppress the noise; Secondly, based on the Hough line roughness detection of the image, the detection results are divided unevenly, and then the fine detection is carried out to obtain the seed points growing in the region; Finally, region growing is used to restore the line target. Experimental results show that the algorithm can accurately extract line targets, and the number of seed points selected by the algorithm is increased by 5.37 times compared with the traditional region growth, and the line target extraction results have better continuity and integrity.

Key words: synthetic aperture sonar, line target extraction, Hough line detection, region growing, Otsu algorithm

CLC Number:

OUYANG Quanping, ZHOU Li, WANG Sheng, SONG Shilin, LU Bin, FENG Junjun. Line target extraction of synthetic aperture sonar image based on Hough line detection and region growing[J]. Bulletin of Surveying and Mapping, 2021, 0(11): 48-53.

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Line target extraction of synthetic aperture sonar image based on Hough line detection and region growing

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