针对现有的前视声呐数据可视化算法存在的边缘模糊等问题,根据多波束前视声呐成像机理,提出一种将双立方插值应用到声呐数据可视化中的算法.确定插值点的16个邻近回波点,计算每个回波点的距离权值和角度权值,最终将16个回波点的加权像素值作为插值点对应的像素值.仿真数据与Gemini720i前视声呐现场数据可视化实验结果表明:较之现有的可视化算法,本算法具有更高的峰值信噪比和更好的边缘保持效果,能够更有效地提高可视化得到的图像质量.%To deal with edge blur and mosaic of current data visualization algorithmsa, a bi-cubic interpolation is incorporated into the sonar data visualization algorithm according to the imaging mechanism of niulti-beam forward looking sonar. The 16 near echo-points of the interpolation point are determined, and their distance weights and angle weights are calculated. Finally, the weighted pixel value of all the 16 near echo-points is used as the pixel value of the interpolation point. Experiments on both simulation data and real data obtained by Gemini 720i forward-looking sonar show that the proposed algorithm has the advantages over current algorithms in terms of peak signal to noise ratio and edge-preserving effect, and thus can effectively improve image quality of visualization.
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