关键词: 图像去噪, 模极大值, 阈值, 样条, 小波域

Abstract: Wavelet image denoising has been well acknowledged as an important method for denoising in Image Processing. The principles of several wavelet denoising methods including the Mallat forced denoising, the wavelet transform modulus maximum method, the nonlinear wavelet threshold denoising method and the denoising based on the interrelation of wavelet domain are described, and this paper compares these methods, and gives two improved methods. The results show that they are practicable and effective for image denoising.

Key words: image denoising, modulus maximum, threshold, spline, wavelet domain