说明：  图像去噪是指减少数字图像中噪声的过程称为图像去噪。现实中的数字图像在数字化和传输过程中常受到成像设备与外部环境噪声干扰等影响，称为含噪图像或噪声图像。
(Image denoising refers to the process of reducing noise in digital images, which is called image denoising. In the process of digitization and transmission, the digital image in reality is often affected by the interference of imaging equipment and external environment noise, which is called noise image or noise image.)