In order to resolve the problem of speckle interference phase map noise interference, a phase denoising method of digital speckle pattern interferometry based on empirical wavelet transform (EWT) and cross correlation is proposed. First, the EWT is used to decompose the speckle phase map, and a series of components is obtained. Then the noise-free components containing phase information are extracted based on the cross correlation. After that, combined with the particle swarm optimization algorithm and sine–cosine denoising method, an improved sine–cosine denoising method is proposed to process the noise components. Finally, the noiseless components are reconstructed to obtain the denoised speckle phase map. Simulation and experimental results show that the proposed method can effectively reduce the noise interference and obtain accurate phase information.

中文翻译：

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基于经验小波变换和互相关的散斑相位图去噪

为解决散斑干涉相位图噪声干扰问题，提出了一种基于经验小波变换(EWT)和互相关的数字散斑干涉测量相位去噪方法。首先，利用EWT对散斑相位图进行分解，得到一系列分量。然后基于互相关提取包含相位信息的无噪声分量。之后，结合粒子群优化算法和正余弦去噪方法，提出了一种改进的正余弦去噪方法来处理噪声分量。最后，重构无噪声分量以获得去噪散斑相位图。