三维FMF的HFCM水声数据分割

针对三维水声数据背景复杂、受噪声干扰严重等特点，提出一种结合三维FMF的HFCM水声数据分割算法，以提高水声数据分割的精度和效率。该算法首先选取三维滤波窗口，利用最大熵阈值法计算出模糊阈值；再结合半高斯模糊隶属度函数对水声数据进行模糊中值滤波；最后采用HFCM算法对滤波后的数据进行分割。对两组不同的三维水声数据进行分割处理的结果表明该算法能够有效地降低噪声干扰，分割效果要优于未滤波的HFCM以及均衡FMF的HFCM分割算法，并且在分割效率上要明显优于传统的模糊C均值算法。

Underwater acoustic data segmentation via HFCM with 3D FMF

The 3D underwater acoustic data usually contains complex background and serious noise pollution. With regard to these features, an underwater acoustic data segmentation algorithm via histogram fuzzy C-means (HFCM) with 3D fuzzy median filter (FMF) is presented to improve segmentation accuracy and efficiency. In this study, first, a 3D filter window was selected, and the fuzzy threshold was calculated by the maximum entropy threshold method in the filter window. Then the underwater acoustic data was filtered by the FMF with the semi-Gaussian fuzzy membership function. Finally, the HFCM segmentation algorithm was adopted to segment the filtered data. The results of segmentation of two different groups of 3D underwater acoustic data showed that the effect of the segmentation algorithm was better than the unfiltered HFCM segmentation algorithm and the HFCM segmentation algorithm with equilibrium FMF. And the operation time was shorter than the traditional FCM algorithm distinctly. The underwater acoustic data segmentation algorithm via HFCM with 3D FMF can reduce the noise effectively and obtain a better segmentation result.