Aiming at the serious noise pollution problems in sonar image

spectral clustering algorithm is introduced into denoising method based on morphological wavelet in order to realize image denoising with low SNR.Sonar image denoising method based on morphological midpoint wavelet is given.The concept of spectral clustering is introduced and used for the classification of high-frequency wavelet coefficients after morphological midpoint wavelet decomposition because of its fast data classification features.The wavelet coefficients including noise and detail signal can be separated.After being seperated

the two kinds of wavelet coefficients are respectively and corresponding processed.The denoised image can be obtained by the reconstruction of low-frequency wavelet coefficients.The simulation experiments show that the proposed method are better than other wavelet denoising methods and the feasibility and effectiveness of the proposed method are verified.