Radial Error Analysis and Compensation for Forward Looking Scanning Sonar Imaging [前视扫描声呐成像径向误差分析和补偿]

作者：Yang B.^*; Wang W.; Liu Y.; Li X.; Liang T.; Guo W.; Liao J.; Pan F.

来源：JOURNAL OF ELECTRONICS & INFORMATION TECHNOLOGY, 2021, 43(3): 796-802.

DOI：10.11999/JEIT200744

• Backward mapping
• Bilinear interpolation
• Forward-looking sonar
• Motion compensation
• Radial error
• Sonar imaging

Imaging method based on motion compensation for forward-looking scanning sonar is proposed. By using backward mapping, sector imaging region in the Cartesian coordinate system is converted into polar coordinates. Then two-dimension interpolation is employed in polar coordinates, and the amplitude is extracted and converted into image format. The vehicle motion model is established and analyzed, and vehicle motion is transformed into image domain motion. Real-time motion compensation for forward-looking sonar image is made eliminate radial errors. The forward-looking sonar data of the "Deep Sea Warrior" is analyzed. The maximum radial error of the single image is approximately 19% of the range. The simulation and experimental results show that this algorithm compensates the radial error of the image caused by the motion, which can represent the target information accurately.

• 单位
  中国科学院大学