中文说明：
常用的图像去噪算法，基于隐马尔可夫树模型的小波去噪，基于尺度空间和context模型相结合的自适应小波去噪，基于尺度和空间混合模型的小波图像去噪，Bayes估计阈值软门限去噪 。
English Description：
The commonly used image denoising algorithms are wavelet denoising based on Hidden Markov tree model, adaptive wavelet denoising based on scale space and context model, wavelet image denoising based on scale space mixed model, Bayes estimation threshold soft threshold denoising.