| 多波束声呐图像条带中央和边缘残差处理方法 |
| Residuals processing method for central and edge of the band of multibeam sonar image |
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| DOI： |
| 中文关键词: 多波束 声呐图像 反向散射强度 残差 |
| 英文关键词:multibeam sonar image backscatter residual errors |
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| 中文摘要: |
| 多波束声呐图像是进行海底底质分类的主要数据源之一，由于受海洋噪声、声波散射和混响、仪器设备等因素影响，其经各项常规改正后仍存在明显残差，突出表现在中央波束区和条带重叠区，难以形成高质量的声呐图像。本文分析了多波束声呐图像残差的成因及影响，提出了一种基于多条带最小二乘拟合的多波束声呐图像残差处理方法。首先，得到相邻声脉冲()信号中央区域、重叠区域以及整体趋势的拟合函数；然后，通过拟合函数计算得到中央和重叠区域的残差改正系数；最后，通过改正系数进行残差改正。实验分析表明，该方法在保留原始细节的基础上，有效削弱了残差对声呐图像的影响，对多波束声呐图像处理具有参考和应用价值。 |
| 英文摘要: |
| Multibeam sonar image is one of the main data sources for sediments classification of seabed. Due to the influence of the ocean ambient noise, acoustic scattering, ) signals are obtained by least-square-fitting. Secondly, the residuals correction coefficients of the central and overlapping regions are calculated by fitting function. Finally, residuals are corrected by correction coefficient. The experimental results show that this method can effectively reduce the residual effects on sonar image while retaining the original details. It has reference and application value for image processing of multibeam sonar.reverberation, measuring equipment and other factors, there are still some residual errors in sonar images after each conventional correction. These residual errors are mainly reflected in the central beam area and band overlap area, which makes it difficult to obtain high quality sonar images. In this paper, the causes and effects of multibeam sonar image residual errors were analyzed. A method based on multiband-least-squares-fitting is proposed to deal with the residual errors of multibeam sonar images. Firstly, the fitting functions of the central region, the overlapping region and the overall trend of the adjacent acoustic pulse( |
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