Scatter noise is prominent in sonar images,and the presence of scatter noise greatly affects the quality of the image,adding a lot of negative impact on the subsequent segmentation,enhancement,edge detection and other processing of the image.To address this problem,an NL-Means algorithm incorporating Lee filtering is proposed,which first uses Lee filtering algorithm to filter the sonar image once,and then uses the filtered image to calculate the weights of the weights in the NL-Means algorithm,and then finally combines this weight with the NL-Means algorithm to perform filtering.This method avoids the problem of small weights due to the influence of noise in the weight calculation process and accurately assigns the weights in the NL-Means algorithm.Experiments have proved that the method has better suppression effect on the scattering noise of sonar image and improves the quality of the image.
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