说明：  图像的小波阈值去噪方法是众多图像去噪 方法中的佼佼者,它利用图像小波分解后,各个子带图像的不同特性,选取不同的阈值,从而达到较好的 去噪效果
(Wavelet Image Threshold Denoising Method is one of the many methods of image denoising leader, which uses image wavelet decomposition, each sub-band images of the different features, select a different threshold, so as to achieve better denoising effect)